For a long time, the main pests of wheat that caused damages in our province were crickets, golden worms and cockroaches. The number of larvae was mostly pupa, followed by larvae, and less pupa. Insect pests are concentrated in the pre-wintering period and returning to the filling stage. Before wintering, the wheat will be deficient in seedlings, and returning to the filling stage will result in wilting and dead trees. It is recommended to adopt the strategy of “prevention + spring supplementation†before sowing, and prevention before sowing is the most important issue.
The first is agricultural control. Weedy, extensive management will provide more food and habitat for the underground pests; the application of organic fertilizer without maturity will import more exotic insect resources into the farmland. Therefore, the removal of weeds in roadside fields, deep ploughing and deep turning, rational irrigation, and the application of decomposed qualified organic fertilizers can effectively kill and prevent underground pests.
Followed by pre-battle prevention. For soil treatment, it is recommended to use 5% methylisothiphos granules 1.5 to 2kg/mu or 3% phoxim granules 2 to 2.5kg/mu for the pest soil; 40% methyl iso Phosphorus EC or 50% phoxim EC, 250 ml water 1 to 2 kg/mu. To reduce soil pollution and kill natural enemies, it is recommended that granules be applied to the surface before or during irrigation. Chemical seed dressing, can use 20% butyl sulfide Kebuwei EC 100 ~ 150 ml water 3 ~ 4 kg mixed wheat seed 50 kg, heap stuffy 12 to 24 hours after the dry seeding, or with 50% phoxim EC 100 ml water 2 to 3 kilograms of mixed wheat seed 50 kilograms, heap stuffy 2 to 3 hours after the dry seeding.
Finally, post-emergence treatment. In the case of severe field crops with wheat soil pests, after the temperature rises in the spring, a representative field survey is selected. When the rate of dead seedlings reaches 3%, pesticide application is immediately prevented. Each acre with 50% phoxim EC 20 ~ 50 grams plus appropriate amount of water, mix in 30 to 75 kg of crushed rice bran or bran made bait in the evening to spread the field. If the wheat seedlings are seriously damaged by the underground pests, they can use 50% phoxim EC or 48% chlorpyrifos EC 1000 to 1500 times to spray crude fog, and 40 kg per mu.
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