Integrated control of wheat blossom midge - HGCA

More documents

Recommendations

Info

• Samples were collected in weeks of 24 June or 1 July when the larvae were large enough to see under alow power microscope.• Samples were stored in individual polythene bags. Samples were kept for up to a week in a refrigeratorprior to examination, samples from some replicates were frozen for later examination.Examination• Each ear was examined under a low power microscope.• Working from the bottom of the ear the glume and lema were pulled back to reveal each grain which waschecked on both sides for the presence of wheat blossom midge larvae.• Records were made of viable grain sites as clear (C) or the numbers of larvae found. Numbers found perear were totalled to give1. Total grain2. Damaged grain3. Total larvae4. Total larvae per 100 grain sitesObservations were made of the start of ear emergence (GS51) and the beginning of flowering (GS61). Twoyellow sticky traps in 2002, or pheromone traps in 2003 and 2004, were located at each site prior to earemergence and observed weekly to monitor wbm activity.Yield assessmentsThe plots were harvested in 2003 and 2004 and yields and various quality parameters assessed. Relativeyield figures were calculated as a percentage of three resistant varieties grown in both years, Welford,Brompton and Welland, to give an estimate of the yield potential at each site in the absence of wbm damage.14
Table 4. Varieties tested in each harvest year and lateness of ear emergence as days after Soissons.2002 2003 2004 LatenessArran y Y 13Beaver y 14Cadenza y 9Carlton y 13Chardonnay y 13Charger y 6Claire y Y y 13Consort y Y y 14Deben y 12ECO 22 y Y y 14Einstein y Y y 9Exsept y 14Hereward y 12Hussar y 11Lynx y 14Malacca y Y y 10Napier y 11Option y Y y 10Pennant y Y y 11Rialto y 10Riband y 11Savannah y Y 13Scorpion 25 y Y 12Soissons y 0Solstice y Y y 11Spark y 14Tanker y Y y 13Warlock 24 y 11Welford y Y y 13Xi19 y Y y 12Brompton Y y 13Istabraq Y y 12Nijinsky Y y 13Smuggler Y y 13Vector Y y 15Welland Y y 12A42-02 y 11A45-02 y 12ELS 03-34 y 13FD00039 y 13Exeter y 9NSL WW60 y 14NSL WW61 y 12NSL WW65 y 1115
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 and 10: 987treatedcontrol6Time (min)5432103
Page 11 and 12: AcknowledgementsFunding for this pr
Page 13 and 14: Table 1. Genotype : wbm interaction
Page 15: MATERIALS AND METHODSVarietiesExper
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,
show all

Integrated control of wheat blossom midge - HGCA

Create successful ePaper yourself

Delete template?

Save as template?