Integrated control of wheat blossom midge - HGCA

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Implications for integrated control1. Resistant varieties have a valuable role in reducing the area of crop at risk and, over time, the number oflarvae dormant in the soil.2. Pheromone traps may be used to monitor for the hatch of wbm and identify which crops are mostexposed to egg-laying due to coincidence with their ear emergence period.3. Vulnerable group 1 and 2 wheat and seed crops should be treated with chlorpyrifos as the highestpriority.4. Should time permit, the most vulnerable group 3 and 4 wheat varieties should be treated as a secondpriority.5. Temperatures should be monitored during the period of treatment to calculate when eggs are likely tohatch. Treatment should cease at this stage and when crops reach GS 59, after which their naturalresistance to wbm increases.8
AcknowledgementsFunding for this project was provided through the Defra Sustainable Arable LINK programme (ProjectLK0924) and by the Home-Grown Cereals Authority (Project 2473). Variety comparison experiments wereconducted by Avanta UK Ltd, Elsoms Seeds Ltd and Nickersons UK Ltd, who also provided seed for theother sites. Pheromone traps were provided by Agrisense Ltd. Chlorpyrifos and technical advice wereprovided by Dow AgroSciences. We thank all of project management committee and the technical staffinvolved for assistance with the project.9
Page 1 and 2: Project Report No. 363March 2005Pri
Page 3 and 4: AbstractThe orange wheat blossom mi
Page 5 and 6: and 14 days after Soissons for the
Page 7 and 8: 1210Time (min)86420treatedcontrol m
Page 9: 987treatedcontrol6Time (min)5432103
Page 13 and 14: Table 1. Genotype : wbm interaction
Page 15 and 16: MATERIALS AND METHODSVarietiesExper
Page 17 and 18: Table 4. Varieties tested in each h
Page 19 and 20: varieties. For example at Boxworth
Page 21 and 22: Table 7. Larvae per 100 grains on u
Page 23 and 24: Table 9. Numbers of larvae on chlor
Page 25 and 26: Table 11. Numbers of larvae on chlo
Page 27 and 28: Table 13 Untreated yields in 2002/0
Page 29 and 30: Table 15. Untreated yields (t/ha) i
Page 31 and 32: Table 14. Chlorpyrifos treated yiel
Page 33 and 34: analysed by ANOVA and by a Friedman
Page 35 and 36: To this end we would recommend:1. U
Page 37 and 38: Technical detail 2.Genetic Analysis
Page 39 and 40: Marker AnalysisA molecular genetic
Page 41 and 42: escape, it is not independent of ot
Page 43 and 44: Figure 1 : Levels of range blossom
Page 45 and 46: Figure 3 : Levels of orange blossom
Page 47 and 48: Figure 5: Marker analysis of a samp
Page 49 and 50: 2. MATERIALS & METHODS2.1. Synthesi
Page 51 and 52: GC column is simultaneously directe
Page 53 and 54: In 2003 field experiments were carr
Page 55 and 56: Table 2 Field Trapping Experiments
Page 57 and 58: 3.1.3. Field Trapping Experiments3.
Page 59 and 60: Fig. 6. Expt 1A 2003: pheromone dos
Page 61 and 62:
3.1.3.3. 2004 Pheromone Trap Experi
Page 63 and 64:
Fig. 13. Summary of Expt 2 20046005
Page 65 and 66:
attractive (Fig. 16). In addition,
Page 67:
5. REFERENCESBirkett, M. A., Bruce,
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Integrated control of wheat blossom midge - HGCA

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