Integrated control of wheat blossom midge - HGCA
Integrated control of wheat blossom midge - HGCA
Integrated control of wheat blossom midge - HGCA
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Fig. 13. Summary <strong>of</strong> Expt 2 2004600500Peak Pheromone Trap CatchPeak Yellow Sticky Trap Catch% Attacked Grain45.040.035.0No. <strong>midge</strong>s / week40030020010030.025.020.015.010.05.0% attacked grain0Great Knott Bones Close Summerdells Little Hoos Hoosfield0.0It should be noted that the yellow sticky traps were very unselective and caught many other non-targetinsects as well as S. mosellana making scoring <strong>of</strong> trap catches difficult whereas the pheromone traps caughtat least five times more S. mosellana and few other insects (Fig 14).Fig. 14 Yellow sticky and pheromone trap catches at one site in Expt 2 2004600500yellow sticky (females)pheromone (males)trap catch (no./week)400300200100001/06/2004 08/06/2004 15/06/2004 22/06/2004booting early anthesis anthesis late anthesisThe site at Great Knott field was atypical in that the ratio <strong>of</strong> females caught on yellow sticky traps to malescaught on pheromone traps was higher than at the other sites (Fig. 15) suggesting immigration <strong>of</strong> femalesfrom emergence sites to this field.61
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