Different ways corn insect pests

Since the beginning of summer, temperatures have risen all the way, and summer sowing maize has been plagued by various insect pests.

Hummer has been a very devastating pest on corn this year. If this seemingly insignificant pest is not controlled in time, the top leaves may be curled or curled, which in turn will lead to the occurrence of top rot; This year, the damage was heavier. Corn plants were drilled from the base of corn stems close to the ground. The plants were long and heavy; the beet armyworms were yellow-green or dark green, while eating the mesophyll inside the corn heart. Excretion of feces, corn injury is very heavy; Iridium leafhopper, adults on the leaves on the epidermis, the formation of a white hole, larvae drilled into the corn seedlings from the base of the stem near the ground, the formation of dry heart seedlings; The nymphs sucked on the nutrition of corn. The seedlings on the aboveground part of the seedlings showed seedling blue, plant dwarf and blue and dry, and no heading, and the output was reduced by 20%-30% or spotted.

For the above pests, if it is found that the damage is serious, we must pay close attention to spraying pesticides. Pay attention to the choice of drugs and methods when spraying.

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 selected to compound chlorpyrifos or avermectin, and the sprayer was used to fill the roots. In addition, it should be noted that if there are organic phosphorus pesticides in the formulation, the herbicide should be sprayed at least once a week, or sprayed with a post-emergence herbicide for a week before spraying the insecticide.

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