When there are more than three leaves in summer corn at the end of June and early July, there are often yellow and distorted heart leaves. Sometimes there are irregular yellow-white transparent spots on the newly unfolded heart, and when the plants are severe, they are not stunted. After the trumpet period, the base of the heart leaves rot. After careful inspection, the corn is suffering from the damage of yellow stagnant horses, poke the leaves along the heart to observe, you can see a small dark brown or yellow-brown insects, which is Huangtunjima.
The worms of the larvae of the larvae of the larvae live in the grass roots and leaves of the weeds in the winter and move into the corn fields in the middle and late May of the following year. They breed on the corn for two generations, parthenogenesis, and the first nymphs in late May. In early June, it occurred on spring corn or wheat crops. In mid June, it entered the period of adult emergence. On June 20, it was the peak of egg hatching. In late June, it was the second generation of nymphs. In early July, adults occurred in Summer corn. Drought and wheat stubble coverage are the main factors for the occurrence of heavy thrips in yellow corn in the summer corn field. The shortage of water and fertilizer blocks and the weight of corn on roadsides and ditches are heavy.
Drought and watering and fertilization are practical agricultural measures for preventing and controlling corn yellow peony. When it was found that the occurrence of severe jaundice occurred, it should be sprayed as soon as possible. Imidacloprid, thiamethoxam, avermectin, acetamiprid, pyrethroids and other insecticides can be used. Apply medicine in the morning and evening, spray the liquid into the heart of the corn with a straight nozzle, and add foliar fertilizer containing zinc to promote the healthy growth of corn.
The worms of the larvae of the larvae of the larvae live in the grass roots and leaves of the weeds in the winter and move into the corn fields in the middle and late May of the following year. They breed on the corn for two generations, parthenogenesis, and the first nymphs in late May. In early June, it occurred on spring corn or wheat crops. In mid June, it entered the period of adult emergence. On June 20, it was the peak of egg hatching. In late June, it was the second generation of nymphs. In early July, adults occurred in Summer corn. Drought and wheat stubble coverage are the main factors for the occurrence of heavy thrips in yellow corn in the summer corn field. The shortage of water and fertilizer blocks and the weight of corn on roadsides and ditches are heavy.
Drought and watering and fertilization are practical agricultural measures for preventing and controlling corn yellow peony. When it was found that the occurrence of severe jaundice occurred, it should be sprayed as soon as possible. Imidacloprid, thiamethoxam, avermectin, acetamiprid, pyrethroids and other insecticides can be used. Apply medicine in the morning and evening, spray the liquid into the heart of the corn with a straight nozzle, and add foliar fertilizer containing zinc to promote the healthy growth of corn.
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