Myzus persicae is a polyphagous pest, winter host plants mainly include pears, peaches, plums, plums, cherries and other Rosaceae fruit trees; summer host crops mainly include cabbage, cabbage, radish, mustard, brassica, turnip, pepper, spinach, etc. A variety of crops. I. Harmful characteristics Adults and nymphs suck sap on the leaves, resulting in curling and deformation of the leaves, poor plant growth, affecting the package heart; harming tender stems, young leaves, peduncles, and tender pods to the remaining seedlings, causing stalk distortion. , can not be normal pumping, flowering, fruitful. In addition, peach aphid spread a variety of viruses, causing greater harm. Second, the morphological characteristics of wingless orphan female, body length of about 2 mm, yellow-green and yellow, the latter is between the two colors between red and blue; abdominal tube length is 2.4 times the tail piece, Light color; three hairs on each side of the tail piece. Third, the prevention and control methods 1, to strengthen forecasting. The harm caused by passer poisoning caused by the disease is far higher than the damage caused by its own use. Therefore, it is very important to detect the migration of winged mantis to the vegetable field. 2, pharmaceutical control. Due to the rapid propagation of Myzus persicae, chemicals are generally used to prevent and control, but should be born in the heart of the leaves and the back of the leaves shrinkage, difficult to fully spray. Therefore, in addition to requiring thorough and careful spraying, pesticides should be selected to have the triple effect of killing, absorption, and fumigation. For example, anti-Huwei 50% WP 2000-3000 times solution has special effects. It is effective only for Myzus persicae and is harmless to natural enemies, insects, sericulture, bees, and other beneficial insects, and contributes to the ecological balance in the field. Other options can be used to kill crickets. And 21% of cyanomethoxazole 3000 times, 50% of malathion 1500 times, 40% of dimethoate 1000-2000 times and so on. 3, silver film drive flooding. The silver ash strips shall be laid at the intervals of the vegetables to be protected, and they shall be set before sowing or customizing, which can effectively prevent poisonous lice from migrating into the vegetable field.
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