Wheat bran is a major pest in the late growth of wheat. When wheat heading, the aphids are mainly clustered in wheat leaves, stems and panicles and draw juice. When the larvae are dense, the leaves are yellow and the plants grow poorly. After the ears of wheat are damaged, the grains are not full. When they are serious, the ears are white and can not be strong, or even the whole plant withered and lost a lot. It has become wheat in our area. Important obstacles to high and stable yields. The control of wheat bran and wheat fields that do not control wheat stubble, under the same conditions, a difference of 7-10 g in the weight of a thousand grains, and a severe plot can reduce production by up to 30%. Therefore, timely prevention and control of wheat aphids should be done.
Control methods: When there is a spike rate of 15% or more, when 100 strains of maggots reach 800-1000 heads, it is a critical period of prevention and control, and medication should be immediately used for prevention and control. Per acre can choose 5% of worms net 25-30 ml or 10% yttrium net powder 20 grams, spray 40 kilograms of water. Or use 50% anti-inferiority WP 5-7 grams per 666.7 square meters, or 40% dimethoate or omethoate emulsion 50 ml, or 2.5% dichlorm emulsion 10-15 ml, water 50- 60 kg spray.
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