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Very close up shot of wheat crop ears in field

CropMonitor Headlines

Reports and news items from the 2009 season

Reports

Live-Monitoring report 04/07/2009. The report for the week beginning 29 June is now available.

Live-Monitoring report 26/06/2009. The report for the week beginning 22 June is now available.

Latest News from the regions 19/06/2009. The report for the week beginning 22 June is now available.

Live-Monitoring report 20/06/2009. The report for the week beginning 15 June is now available.

Live-Monitoring report 12/06/2009. The report for the week beginning 08 June is now available.

Live-Monitoring report 05/06/2009. The report for the week beginning 01 June is now available.

Latest News from the regions 05/06/2009. The report for the week beginning 01 June is now available.

Live-Monitoring report 29/05/2009. The report for the week beginning 25 May is now available.

Latest News from the regions 29/05/2009. The report for the week beginning 25 May is now available.

Live-Monitoring report 22/05/2009. The report for the week beginning 18 May is now available.

Latest News from the regions 22/05/2009. The report for the week beginning 18 May is now available.

Live-Monitoring report 14/05/2009. The report for the week beginning 11 May is now available.

Latest News from the regions 15/05/2009. The report for the week beginning 11 May is now available.

Live-Monitoring report 07/05/2009. The report for the week beginning 04 May is now available.

Latest News from the regions 08/05/2009. The report for the week beginning 04 May is now available.

Live-Monitoring report 01/05/2009. The report for the week beginning 27 April is now available.

Latest News from the regions 01/05/2009. The report for the week beginning 27 April is now available.

Live-Monitoring report 24/04/2009. The report for the week beginning 20 April is now available.

Latest News from the regions 24/04/2009. The report for the week beginning 20 April is now available.

Live-Monitoring report 17/04/2009. The report for the week beginning 13 April is now available.

Latest News from the regions 17/04/2009. The report for the week beginning 13 April is now available.

Latest News from the regions 14/04/2009. The report for the week beginning 06 April is now available.

Latest News from the regions 03/04/2009. The report for the week beginning 30 March is now available.

Latest News from the regions 27/03/2009. The report for the week beginning 23 March is now available.

Latest News from the regions 19/03/2009. The report for the week beginning 16 March is now available.

Latest News from the regions 13/03/2009. The report for the week beginning 09 March is now available.

Latest News from the regions 02/03/2009. The report for the week beginning 23 February is now available.

Latest News from the regions 30/01/2009. The report for the week beginning 26 January is now available.

Latest News from the regions 16/01/2009. The report for the week beginning 12 January is now available.

Headlines

Fusarium head blight - national monitoring 13/08/2009

All the survey samples have now been assessed, with 79% showing symptoms caused by Fusarium head blight pathogens. The vast majority of symptoms were still glume blotches, which are not associated with the deoxynivalenol or zearalenone producing species.
All isolations are now complete. The levels of F. graminearum isolated are lower than those seen at a similar stage in 2007 and 2008 (13% in 2009 compared to 26% in 2007 and 2008). In addition the incidence in crop infected by F. graminearum was also lower (0.6 in 2009 compared to 2.1 and 1.5 in 2008 and 2009 respectively). This suggests that toxin levels are still likely to be low, although, as highlighted previously, the final toxin level/profile will depend on the amount of rain between now and harvest. Even so toxin levels should not reach those seen in 2008. 


Fusarium head blight - national monitoring 29/07/2009

To date, all samples from the national winter wheat survey have been sampled and assessed. Of these, 236 (79%) have visual symptoms of fusarium head blight. The vast majority of the symptoms are the blotch type, commonly associated with F. poae and F. langsethiae. Two-thirds of isolations are now complete and have confirmed that F. poae is currently the predominant species. F. graminearum has been isolated in most regions but currently levels are lower than those seen for the past two years. At this stage of the survey, based on current levels of F. graminearum, it would appear that levels of deoxynivalenol and zearalenone at harvest are still likely to be low; although, as highlighted last year, the final toxin level/profile will depend on rainfall between now and harvest. 


Fusarium head blight - national monitoring 14/07/2009

To date (14/7/09), approximately 140 of the 300 samples for the national winter wheat survey have been sampled and assessed. Of these, 104 (74%) have visual symptoms of fusarium head blight. The vast majority of the symptoms are the blotch type, commonly associated with F. poae and F. langsethiae. Early results from isolations (25 samples) have confirmed that F. poae is currently the predominant species (23/25 samples). F. graminearum has been isolated at low levels from 5/25 samples. At this early stage of the survey, it would appear that levels of deoxynivalenol and zearalenone at harvest are likely to be low; although, as highlighted last year, the final toxin level/profile will depend on rainfall between now and harvest. 


Live monitoring - final update from sites (GS75) 07/07/2009

By the beginning of the week (29 June . 3 July), crops at most locations (8/10 sites) had reached GS73-75 (grain milky ripe). Levels of S. tritici are generally lower than those seen previously at the end of the Live Monitoring period, probably due to the cold winter and lack of rainfall in April/May. 2009 has seen the highest incidence of yellow rust in the Live Monitoring trials since they started in 2004. Mildew pressure has been low in many of the Live Monitoring trials, although it threatened to become more severe on a couple of occasions. For most of the season, brown rust pressure has been very low and the threat to most treated commercial crops has been negligible. However, the staggering increase in disease levels at Terrington in the final seven days is a reminder that, even where levels are extremely low earlier in the season, the disease can still present a significant risk later on in unprotected crops. 


Tan spot found 02/07/2009

Tan spot has been confirmed in two fields sampled from Wiltshire for the national wheat survey. Plants from one field have severe symptoms of the disease, with lesions present on leaves and leaf sheaths. The disease is easily confused with Stagonospora leaf blotch (formerly Septoria nodorum). 


Monitoring update 29/06/2009

Growth stages ranged from the end of flowering (GS69) to grain milky ripe (GS73-75) in CropMonitor trials. Visible septoria had increased significantly at some sites, but levels are typically still below those seen at about the same stage in previous years. Levels of yellow rust continue to rise on Solstice and Robigus and, in recent years, the disease has shown little signs of slowing down through June. While the disease pressure is expected to stay high, the majority of promptly and appropriately protected farm crops are likely to remain unaffected. Mildew levels have barely changed after last week's increases and the threat from the disease at most of the Live Monitoring sites remains low. The warm and humid conditions in the last few days have been favourable for further development of brown rust on susceptible varieties such as Solstice. However, inoculum levels in most crops are now so low that the risk of a significant outbreak of the disease is minimal. 


New race of yellow rust 29/06/2009

The Fera/HGCA-funded UK Cereal Pathogen Virulence survey (UKCPVS) conducted by NIAB has verified the presence of a new race of yellow rust on UK winter wheat. The new pathotype was isolated from Solstice in 2008. Subsequent tests showed that Solstice became heavily infected when inoculated with the new race whilst two other previously resistant varieties, Ketchum and QPlus, (both related to Solstice) also suffered moderate to high infection. Humber and Viscount (also resistant but not related to Solstice) also showed susceptibility. Oakley, already known to be susceptible to existing pathotypes, was also more susceptible to the new race. 


Monitoring update 22/06/2009

At the beginning of the week growth stages varied from mid flowering (GS65) to watery ripe (GS71). Crops in flower continue to be at risk from fusarium head blight. Symptoms of septoria have increased but levels remain lower than in previous years. Further spread may occur due to heavy showers but the threat to yield continues to be below average in many areas. Yellow rust levels have increased again since last week, and the disease progress continues to follow a similar track to 2008. The threat to crops which have received adequate treatment will be much reduced. Mildew has increased significantly, with disease pressure now higher than in recent years but with absolute disease levels still low in the majority of cases the overall threat to yield is not significant. The incidence of brown rust has increased this week and the conditions are likely to remain favourable for further development. However, the threat this year remains low, particularly in treated crops. 


Monitoring update 15/06/2009

Growth stages mostly varied from early to late flowering last week. Recent rain will have favoured infection by Fusarium head blight pathogens and risks will increase if the rain continues. The overall threat from Septoria tritici this year is still relatively low although the recent rain is likely to mean that new septoria lesions will appear shortly. Despite forecasts of further rain, it is unlikely that the septoria risk is going to change significantly for rest of the season. Yellow rust pressure has been high in many areas this year, and the confirmation of a new race affecting varieties like Solstice, has added to the threat. With the risk already medium or high in many varieties across the country, it is not expected that this will increase much more this season, although disease levels themselves are likely to rise for a few more weeks. The incidence and risk of brown rust and mildew remain very low. 


Cereals 2009 08/06/2009

CropMonitor will be at Cereals 2009 at Royston in Cambridgeshire. Come along and see us on Stand 430 (The Food and Environment Research Agency (Fera formerly CSL)) on Wednesday or Thursday. 


Monitoring update 07/06/2009

Growth stages now range from mid ear emergence (GS55) to mid flowering (GS65) at most locations. Overall, the septoria risk did not increase last week, and it continues to be relatively low in many areas (disease levels on leaf 3 are typically below those seen in the past five seasons). Yellow rust is continuing to increase, and rapidly in some varieties. Recent experience suggests that the higher temperatures and dry conditions this week cannot be relied upon to halt disease progress where it is already present. Crops at risk will justify continuing protection. The mildew risk remains low. Where the disease is active in the most vulnerable crops it is spreading quite quickly and there is a risk of it developing on the upper leaves and ears if unprotected. High temperatures earlier this week were favourable for brown rust. However, the risk in fungicide treated situations remains low due to the very dry conditions and the current lack of inoculum in most crops. 


New race of yellow rust 07/06/2009

The Fera/HGCA-funded UK Cereal Pathogen Virulence survey (UKCPVS) conducted by NIAB has verified the presence of a new race of yellow rust on UK winter wheat. The new pathotype was isolated from Solstice in 2008. Subsequent tests showed that Solstice became heavily infected when inoculated with the new race whilst two other previously resistant varieties, Ketchum and QPlus, (both related to Solstice) also suffered moderate to high infection. Humber and Viscount (also resistant but not related to Solstice) also showed susceptibility. Oakley, already known to be susceptible to existing pathotypes, was also more susceptible to the new race. CropMonitor has detected yellow rust on Solstice at Boxworth, Caythorpe, Morley, Terrington and Callow. The highest levels are at Caythorpe (4.5% leaf 2) and Boxworth (2.3% leaf2) - the races present will be identified. Yellow rust continues to increase on other susceptible varieties and crops at risk justify continuing protection. 


Update on fusarium stem base disease 05/06/2009

Crops are currently at flowering and are therefore at a highly susceptible stage for infection by fusarium head blight pathogens. Monitoring work shows that Fusarium species (F. graminearum & F. culmorum) have been frequently isolated from the upper leaves at all but the York site, whereas Microdochium species are much less common. Their presence and the predicted unsettled weather indicate that risks of crop infection by a mycotoxin-producing species of fusarium are increased. 


Ear emergence - Monitoring update 29/05/2009

Ears are now emerging at most of the Live Monitoring sites, with crops ranging from GS45 to GS59. Septoria continues to be the main disease present. Levels are generally still equivalent or lower compared to the same stage in previous seasons (except at Morley (sown earlier)). However, symptoms now appear to be increasing most rapidly at sites where the risk would be expected to be highest. Most areas had enough recent rainfall to facilitate further spread of septoria onto the top two leaf layers. The yellow rust risk remains high in many areas this season. However, with warmer temperatures and most commercial crops now treated, crops or areas that are currently free from the disease should not be at undue risk. Mildew risks remain low at most of the sites although observations from elsewhere suggest that mildew is more prevalent in commercial winter wheat crops, especially in later sown crops or in fertile situations. The threat from brown rust remains relatively low this year. 


Spring bean downy mildew 29/05/2009

Risks from downy mildew on spring beans are now reducing but to the drier warmer conditions and advancing growth stages 


Update on fusarium stem base disease 22/05/2009

Levels of fusarium stem base diseases are still very low at most sites (<10%) with symptoms being caused in equal proportion by Microdochium or Fusarium species. The exception is the site at Sutton Scotney where 50% of plants are showing syptoms, all of which are caused by Microdochium species. Limited splash dispersal of inoculum onto the leaves has been detected at any site except Sutton Scotney where both Fusarium (including F. graminearum) and Microdochium species have been detected on the leaves. This shows that inoculum is dispersing early in the season at this site and indicates heightened risk of ear disease later in the season at this location. 


Spring bean downy mildew 22/05/2009

Spring bean crops are now at the 4-6 leaf pair stage. Downy mildew symptoms have been reported in the South and East of England. Current risk levels are moderate to high across the country with highest risks in the west. 


Live monitoring update 22/05/2009

Live Monitoring crops have reached GS37, with most at GS39-45. Rain in many areas will have increased the risk of septoria spreading onto the flag leaf (and leaf 2). However, the general threat from septoria is not unusually high in any area this year, and the risk level is medium or low in many cases. Mildew was found at one new location this week but the disease risk this year remains low at most locations (data from the York site continues to highlight this as the highest risk area). Yellow rust was recorded at the Cirencester site on Robigus (making four sites affected in total). The yellow rust risk on unprotected susceptible varieties such as Robigus and Oakley remains high in many areas. Predicted increases in temperature will decrease the risk of fresh outbreaks in crops or areas currently free from disease (but will favour brown rust). No symptoms of brown rust were found this week and the risk in most farm crops remains relatively low this year. 


Winter oilseed rape crops at late flower/petal fall 15/05/2009

Winter oilseed rape crops have now reached late flowering with advanced crops at petal fall. Sclerotinia risk remains a concern. 


Live monitoring latest - 15/05/2009 15/05/2009

Septoria levels are currently very variable between locations. Many areas have remained dry and risk of exposure of emerging leaf layers to significant septoria infection is low. The current threat at many of the Live Monitoring sites is therefore lower than that indicated by the historic risk. Forecasts of imminent heavy rain for some areas will increase risks. Although yellow rust has only been reported at three of the Live Monitoring sites in the east, the risk on unprotected susceptible varieties such as Robigus (and Oakley) remains medium or high in many areas. This week's cool, damp weather is likely to favour further development, especially in central and eastern England. Mildew levels are increasing, but this is mainly on the lower leaves. Overall though the threat to most crops remains relatively low. Traces of brown rust were recorded this week for the first time at Boxworth and York. However, the risk to most treated crops remains relatively low this year. 


Fusarium stem base disease 15/05/2009

Isolation work indicates that levels of stem base infection, in particular symptoms caused by Microdochium spp. are lower than at the equivalent point in 2007 and 2008. 


Live monitoring latest 08/05/2009

Crops at the live monitoring sites now range from GS32 to GS37. With the exception perhaps of Morley (partly due to earlier sowing), visible septoria levels at each site are generally at or below the levels seen in previous years for the same date or growth stage. Levels of yellow rust have increased again at Boxworth and Terrington and symptoms are now present at Caythorpe. The yellow rust risk on Robigus and other susceptible varieties remains relatively high, especially in central and eastern England. Mildew levels continue to fluctuate. However, at York and Callow the disease incidence has increased and is also now present on all varieties at the Somerset site. With mildew still absent from most sites, the overall disease risk is largely unchanged. There were no reports of brown rust from any of the Live Monitoring sites again this week. 


Winter oilseed rape crops in full flower 08/05/2009

Sclerotinia remains a concern for growers as crops across the country range in growth stage from early flower to petal fall. Extended flowering will increase risks from sclerotinia. 


Downy mildew on spring beans 08/05/2009

Spring bean crops are beginning to flower. Crops in some parts of the country are currently at high risk due to the current growth stage and recent rainfall. Bean downy mildew symptoms have been reported in isolated crops in the east of England but several crops in the south west are also reported to be showing infection. 


Wheat Live-monitoring 2009 17/04/2009

An updated version of our live-monitoring is now available for this season. As a result of the new collaboration on CropMonitor, an updated version has been developed with the aim of improving the presentation of the weekly disease progress and regional risk assessment. We hope you will try our new live-monitoring and provide feedback. 


Light Leaf Spot 06/04/2009

Image ID: 46 Assessment of oilseed rape crops at stem extension, as part of the Defra-funded national survey, is almost complete. Approximately 95% of samples have been assessed, and results show that light leaf spot is being found at similar high levels to this time last year. Crops with the highest incidence of symptoms are those in the Midlands &amp; West, North and South East regions.
Reports from around the regions by the AICC also highlight that Light leaf spot is particularly evident in the East and Northern regions.  Click for further images .


Wheat Live-monitoring 2009 06/04/2009

Coming soon, an updated version of our live-monitoring for this season. As a result of the new collaboration on CropMonitor, an updated version has been developed with the aim of improving the presentation of the weekly disease progress and regional risk assessment. When assessments have begun at all sites, the new version of live-monitoring will be available - we will let you know, via email alert and via this page, when the pages are released. We hope you will try our new live-monitoring and provide feedback. 


Oilseed rape commercial survey: Light leaf spot 20/02/2009

Image ID: 46 Assessment of autumn disease levels show that, in contrast to last autumn when no light leaf spot was recorded on surveyed plants, this year light leaf spot was found on 1.8% of plants assessed, which represented 8% of crops surveyed. This was also higher than the long-term mean of 3.3% crops affected.
For further details of light leaf spot levels click here.
For full autumn survey results click here Click for further images .


Oilseed rape commercial survey: autumn disease levels 19/01/2009

Image ID: 46 Results of autumn disease levels, visually assessed at mid-leaf production, are now available. To view click here.. In contrast to last autumn when no light leaf spot was recorded on surveyed plants, this year light leaf spot was found on 1.8% of plants assessed, which represented 8% of crops surveyed. This was also higher than the long-term mean of 3.3% crops affected.  Click for further images .


Phoma 13/11/2008

Image ID: 47 In the South East most crops are now at or approaching threshold levels, particularly crops of Castille, although symptoms are still hard to find on more resistant varieties. In the South West however, even resistant varieties are approaching threshold. In other regions, Phoma is also active - in the North East lesions are now easy to find in earlier sown crops. Threshold = 10-20% plants affected (10% for small plants) Click for further images .


News from the regions 13/11/2008

The CropMonitor 'News from the Regions' reports will now be available every fortnight. The next report will be available on 21 November. 


Phoma 27/10/2008

Image ID: 47 In the South West and Eastern counties, the AICC report that crops have reached, or are reaching threshold levels. In the South West, even cultivars with high resistance are now approaching threshold. Threshold = 10-20% plants affected (10% for small plants). Vigilance is required.  Click for further images .


Aphids 27/10/2008

The bird cherry-oat aphid (Rhopalosiphum padi) is flying at this time of year and is a significant vector of BYDV once established in crops of wheat and barley. The latest information on the flights of this (and many other) aphids can be seen on the Rothamsted insect survey website


Phoma 17/10/2008

Image ID: 47 In the Eastern Counties, the AICC report that earlier drilled crops are reaching threshold levels of Phoma. Threshold = 10-20% plants affected (10% for small plants). Vigilance is required.  Click for further images .


Gout Fly 17/10/2008

Image ID: 120 The AICC report high numbers of Gout Fly eggs in the East Counties and the South East. In the Eastern counties it has been noted that eggs are even appearing on crops which have only just emerged.  Click for further images .


Slugs 10/10/2008

AICC members have reported that slugs are active in oilseed rape crops and that large populations have been reported in wheat crops that have followed oilseed rape. 


Reporting begins for 2008/2009 season 02/10/2008

The CropMonitor Latest News from the Regions reports begin in October. The first report is now available. 


Phoma 02/10/2008

Image ID: 47 AICC members from around the regions have reported that Phoma is now present in Oilseed Rape. In the South West, levels of up to 10% have been seen in early-sown treated crops, while in the Eastern Counties first spotting has been noted. Vigilance is required. Update 10/10/2008: First spots also noted in the West Midlands.  Click for further images .


Turnip Sawfly 02/10/2008

Turnip Sawfly caterpillars have been found in early sown crops in both the South and the East, although the risk is low elsewhere. Their presence is sporadic, but foliar damage can be significant if present. It is worth checking crops in the South and East. 


Cabbage Stem Flea Beetle 02/10/2008

CSFB larvae AICC members have reported Cabbage Stem Flea Beetle damage specifically in the East Midlands on crops that have not received a seed treatment, and also some shotholing in other regions. Adult flea beetle damage can be a problem at the cotyledon stage of the crop - therefore vigilance is required in crops at this stage. HGCA Topic Sheet  Click for further images .