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一、观测依据: 1.麦水蝇成虫要取食补充营养,因此,春季油菜花蜜是麦水蝇成虫的最佳食料,通过取食后才开始产卵。其补偿期约需10—14天。油菜达到盛花期,麦水蝇成虫进入取食盛期。油菜终花期,发水蝇卵粒达到孵化高蜂期,孵化率50％以上。 2.靠近油菜的麦田着卵密度大。从麦田与油菜田相隔不同的距离卵粒密度调查结果是:卵粒密度由近至远依次下降。我站1978年调查。小麦距油莱田50米、80米、100米,500米时,其百株卵量分别为3142、582、250、102、47粒。
First, the observation is based on: 1. Aphis gossypii adults to take nutritional supplements, therefore, the spring rape nectar is the best food ingredients adult schizonts, feeding began after the spawning. The compensation period takes about 10-14 days. Rape reaches the full flowering stage, and the adult of the water fly enters the feeding period. The final flowering of rape, hydatidhead egg hatch reached high bee hatch, hatching rate of 50%. Close to the rapeseed wheat field ovulation density. From the wheat and rape fields separated by different distances Egg density survey results are: egg density in turn decreased from near to far. I stood 1978 investigation. When the wheat is 50 meters, 80 meters, 100 meters and 500 meters away from the oilleaf field, the eggs of one hundred plants are 3142, 582, 250, 102 and 47 respectively.