Practice has proved that Trichogramma is a biocontrol technology that is simple to use, saves labor, has low cost of prevention, is safe, non-toxic and does not pollute the environment, and has good control effect on corn bran. However, there are several aspects to be aware of when using this technology:
1. In order to achieve the expected control effect, we must do a good job of monitoring, master the best prevention time, and timely control the beekeeping to ensure the prevention and control effect.
2. After the farmer receives the bee card, the bee card should be released to the field in time and stored for a long time. It can be released in the event of light rain. In case of heavy rain, you should choose a cool place to disperse the bee card. Do not put it together with pesticides.
3, put the bee corn field, put the bee 4 days before the bee, do not allow pesticides within 20 days after the bee.
4. When releasing, set the position according to the wind direction and wind speed. If the wind is large, the distribution point or release amount should be appropriately increased in the upper air head, and the lower air head can be appropriately reduced.
5. When releasing, if the dew on the corn leaves is too large, it should be dried and then rolled. When hanging the card, the blade should not be rolled too tightly to avoid affecting the bee. It should not be placed in the corn leaf or randomly placed on the leafhopper to avoid the bee card failure.
6, can not use a pin, toothpick and other things bee card, in order to prevent the harvesting of corn harvesters when harvesting or when the feed is tied to the cattle stomach, an accident.
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