The corn stickworm prefers a warm and humid environment and is prone to outbreak under meteorological conditions with high precipitation, high soil and air humidity. Do not ignore this tiny corn stickworm. When the big pests happen, they often eat up all the leaves, leaving only light stalks, causing a serious reduction in corn production. How to prevent it?
The use of chemical drugs, the prevention and treatment period before the third larvae is better, the amount of liquid used per mu according to the size of the corn plant, before jointing with 30 to 40 kilograms per mu, after jointing with 50 to 60 kilograms of mu, spray uniform, leaves The front side is balanced, and it does not leak, and the heavy rain is sprayed for 8 hours. When the maize field has 100 to 20 strains of 30 insects, and 100 to 100 strains of insects in the middle and late stages of growth, it will be treated with pesticides. Available 2.5% trichlorfon powder, spray 2 to 2.5 kg per acre, or 2.5% dipterex 1000 to 2000 times liquid spray, or 2.5% deltamethrin EC, 20% quick phase EC 1500 to 2000 times liquid .
Using biological control, young urea can be sprayed with 200ppm of Diflubenzuron No. 1～3 at the young instar stage, and its efficacy is above 94.5%. It does not kill natural enemies and is safe for crops. You can also use adult spawning habits. From the beginning of your spawning period to the end of the progeny period, you can trap and kill the sweetgrass in the field. The sweet and sour sauce is seduce by the ratio of sugar 3 : liquor 1 : vinegar 4 : water 2 and mix thoroughly. production.
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