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Green food corn adopts biological measures to prevent corn borer
First, high-pressure mercury lamp prevention and control: This method is mainly used to prevent and treat corn borer. The specific method is to set up a high-pressure mercury lamp around the village center to trap and kill adults that have not yet landed in the field, so as to reduce field pests and reduce damage. The main method is to use a 400-watt special inner town high-pressure mercury lamp as a unit in townships for joint defense. Set the lights to choose an open place, the light from the 150 meters, the light is fixed on the wooden frame, set up under the fluttering pool, with a brick to wipe a layer of cement. Starting in late June, the lights will be switched on. The lights will be turned on at the end of July. The light will be turned on at 9:00 each evening. The light will be turned off at 3 o'clock the next day. Each morning, the killing cocoon moth will be removed and the pool water will be changed. II. Trichogramma control: Trichogramma is safe, non-toxic, non-polluting, and non-polluting. It is easy to use and has good anti-smelting effect. Prevention time: In the field generation egg generation (15% adult emergence rate) and the peak period (usually from the first quarter put the bee about 7 days), each one. Put the bee method: put 2 bees per acre, place 7000 heads for the first time, put 8000 heads for the second time, put 3 points per acre, and select robust corn plants on the point, on one leaf surface in the middle, along the main The pulse is torn into two halves, half of which is placed on the bee card, gently rolled into a tube along the direction of the stem, and then secured with a wire. However, three problems need to be addressed when using the eye bee to prevent corn borer: First, the bee card on the day. , The same day, second, the tearing of the card, the eggs fall off to concentrate, the third is hanging cards, leaves do not roll too tight, so as not to affect the bees. Third, Beauveria bassiana or Bt powder prevention and control, mainly sealing and killing cocoon moths, the method is from April to May before the corn cocoon awakening with Beauveria powder or Bt powder containing 5-10 billion spores per gram, per cubic meter 100 grams of stalks are sprayed, and the overwintering larvae can also be killed by returning the straw to the field, and the corn straw can also be fermented before the emergence of the corn mash. Fourth, the use of bacteria to cure earthworms: In the corn leaf stage, each plant corn is usually applied 2 grams of Beauveria bassiana granules, or Bt WP, per hectare of the amount of 1200 grams -1500 grams, made of granules, applied to the heart of corn leaves In the treatment of maggots with bacteria. (Sun Yansheng)