Since the beginning of summer, the scarce rainfall temperature in Anhui, Shandong, and Henan has been rising all the way, and summer sowing maize has been plagued by drought, and it has also been plagued by various insect pests.
Hummer has been a very devastating pest on corn this year. If it is not timely controlled by this seemingly insignificant pest, the corn's top lobe is not well developed and curled up or curled up, and heavy causes leading rot; The Aetna coleoptera, this year, is heavier to attack, from the maize stem base close to the ground into the corn plants, ranging from long corn stubble, weight is dry heart; beet armyworm, yellow-green or dark green body, in The heart of corn eats the leaf while excreting the feces, and the corn is very injured; while the leafhopper is different, the adults feed on the leaves to form a white hole. The larvae drilled into the corn seedlings from the base of the stem near the ground to form dead heart seedlings. The wheat roots and stink bugs sucked corn nutrition with nymphs. The seedlings above the seedlings appeared seedling blue, plant dwarf, and green and dry without cuttings, and the yield was reduced by 20%-30. % or spot loss.
For the above pests, if it is found that the damage is serious, we must pay close attention to spraying pesticides. When spraying, it is necessary to pay attention to the selection and use of drugs.
For thrips, focus on the use of thiamethoxam or acetamiprid for the reconstitution of pyrethroids and zinc fertilizers; for Lepidoptera pests such as beet armyworm and cotton bollworm, select the Dimensional salts or Chlorprobenzuron plus The upper pyrethroids or organophosphates are also the focus of attention. As for the two pointworms, the selected agent is the same as the above, but the method of administration is not the same. The wheat field around the seedlings should be pulled to the middle of the row and the nozzles should be aligned. The seedlings sprayed the liquid on the base of the stem; for the different leafhoppers of G. lucidum and G. lucidum, thiamethoxam or imidacloprid was used as a mixture of chlorpyrifos and avermectin, and the sprayer was used to fill the roots. In addition, it should be noted that if organic phosphorus pesticides are included in the formulation, the herbicide should be sprayed after a minimum of one week, or sprayed with a post-emergence herbicide for one week.
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