Control technology of summer corn corn borer

Corn (2313, -7.00, -0.30%), such as the heartworm, belongs to the family Lepidoptera. Corn borer is a world-class pest, with more than 150 species of host damage , of which corn is the most harmful. Especially the damage to summer corn is very serious.

First, the characteristics of the hazard:

Corn borer is harmed by larvae, which can cause corn leaf, cockroach, stalk, ear dysplasia, and mildew of the grain, resulting in reduced yield. When the corn is packaged, the larvae are concentrated in the eucalyptus or tassel to bite the tassel; after the tassels are taken out, they are plunged into the stems, and the wind blows easily to cause the males; after the females grow, the larvae are old and the larvae are large. When the seeds are damaged on the ears or into the ears and their surrounding sections, the damage to the pith destroys the tissue, affecting the nutrient transport, causing the ear to develop poorly, reducing the 1000-grain weight, and being easily blown off by the wind at the insects, forming early dryness and cockroaches. Grain, the yield is greatly reduced.

Second, prevention measures:

   1. Extinguishing adults: Because adult corn borer is active at night, it has a strong phototaxis.

Therefore, frequency-vibration insecticidal lamps, black light lamps, high-pressure mercury lamps, etc. are used to trap corn pupa adults. Generally, they start to lure at the end of July in late May . At night, the sun sets and turns on the lights, and the morning sun comes out to turn off the lights. It not only traps corn pupa adults, but also traps all phototaxis pests.

   2 , larvae: granules can be used to kill corn pupa larvae by spraying the corn heart or using a spray of homemade granules.

First, in the heart leaf stage, the liquid is sprayed on the upper leaves of the corn plant with an ultra-low-volume electric sprayer to kill the corn borer larvae that are harmful to the heart. You can choose 20% DuPont Kangkuan with a systemic absorption of 1 : 3000 times for prevention and control. It has a long- lasting effect and can achieve twice the result with half the effort .

In the middle of the heart, in the middle of the heart, 5 kg of fine sand mixed with 0.5 kg of Beauveria bassiana powder is used to make granules. In the corn heart, the Beauveria bassiana is parasitic on the larvae of the corn borer that is harmful to the heart. Dead field larvae.

The third stage heart leaves, phoxim 1 kg of 50%, mixed with a fine sand 50 75 kg sieved into granules, administered the leaf sprinkle corn kill the larvae, a one hectare 1.5 2 kg phoxim Just fine.

 

 

 

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