Different methods for controlling different pests in corn
Since the beginning of summer, the temperature of rare rains in Lulu and Henan has been rising all the way. The summer sowing corn is also suffering from various pests while suffering from drought.
Hummer has always been a very awkward pest on this year's corn. If this seemingly inconspicuous pest is not controlled in time, the top leaf of the corn is not well developed and curled or curled, which leads to the occurrence of top rot; Point moth, this year is a serious damage, from the corn stem base close to the ground to drill corn plants, light corn long, heavy but heartless; beet armyworm, yellow-green or dark green insect body, in In the heart of the corn, while eating the mesophyll, the feces are excreted, and the corn is seriously injured; the cockroach is the cockroach, and the adult licks the epidermis 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 a dead seedling; the roots of the wheat roots were sucked by the nymphs to suck the corn nutrients, and the upper part of the seedlings showed green, short and green and no panicles, and the yield was reduced by 20%~30. % or spots are not included.
For the above pests, if it is found to be serious, it is necessary to take time to spray control. You need to pay attention to the choice and use of the medicine when spraying.
For the thrips, use thiamethoxam or acetamiprid to match the pyrethroids and zinc fertilizers. For lepidopteran pests such as beet armyworm and cotton bollworm, choose a vitamin salt or chlorantraniliprole. On the pyrethroids or organophosphorus, it is also the focus of the heart; as for the two-pointed moth, the choice of the same agent as above, but the medication is not the same, you should first pull the wheat bran around the seedlings, the nozzle is aligned The seedlings spray the liquid to the base of the stem; for the scutellaria and the wheat roots, the thiamethoxam or imidacloprid is selected to chlorpyrifos or avermectin, and the roots are removed. In addition, it should be noted that if there is an organophosphorus pesticide in the formula, the herbicide should be sprayed at least one week apart, or the insecticide should be sprayed after spraying the herbicide for one week.
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