Unfavorable weather conditions to prevent the occurrence of corn borer
2023-02-13 21:05:57
This year, Heilongjiang corn borer will generally appear moderately heavier, with the southern part being more prominent than the northern part. The period of occurrence is close to normal, and the adult emergence period is relatively concentrated. There is little difference between the north and the south, and most areas occur around mid-July.
In May, the rainfall was high and the temperature was low, but after entering June, the temperature was higher, which accelerated the growth of corn and the emergence of corn pupa and pupa. On the whole, the development of corn borer in most parts of our province is close to normal, which is beneficial to corn borer damage. Another meteorological department predicts that the average precipitation in Heilongjiang Province in summer is slightly more than the average in the summer, precipitation is concentrated in midsummer, and the temperature is slightly lower, which has no adverse effect on emergence of corn borer and hatching of larvae.
To this end, plant protection experts put forward prevention and control suggestions for farmers' friends: 1. Light trapping and killing adults. In the vicinity of the corn stalks, a projection insecticidal lamp or a projectile insecticide lamp is provided with a hanging lure, which can trap and kill adult corn borer. At the peak of the local corn borer, turn on the light and seduce, and turn on the light every day from 9:00 pm to 4 am the next day. 2. Release Trichogramma to cure eggs. According to the survey results of emergence and field oviposition of corn borers, the bees were placed 2-3 times during the peak period of corn fall, with intervals of about 10 days, two points per acre, and the total number of bees was 15,000. 3. Field spraying control larvae. At the end of the corn leaf stage, larvae are controlled by field spraying using a self-propelled high pole crop sprayer. Spraying agent can be selected BT (Bacillus thuringiensis) powder, 25 grams per acre (50000UI/mg) water spray; or use 4.5% beta cypermethrin EC 40ml/mu spray control. In strict accordance with the "Pesticide Safety Code of Practice" application.
In May, the rainfall was high and the temperature was low, but after entering June, the temperature was higher, which accelerated the growth of corn and the emergence of corn pupa and pupa. On the whole, the development of corn borer in most parts of our province is close to normal, which is beneficial to corn borer damage. Another meteorological department predicts that the average precipitation in Heilongjiang Province in summer is slightly more than the average in the summer, precipitation is concentrated in midsummer, and the temperature is slightly lower, which has no adverse effect on emergence of corn borer and hatching of larvae.
To this end, plant protection experts put forward prevention and control suggestions for farmers' friends: 1. Light trapping and killing adults. In the vicinity of the corn stalks, a projection insecticidal lamp or a projectile insecticide lamp is provided with a hanging lure, which can trap and kill adult corn borer. At the peak of the local corn borer, turn on the light and seduce, and turn on the light every day from 9:00 pm to 4 am the next day. 2. Release Trichogramma to cure eggs. According to the survey results of emergence and field oviposition of corn borers, the bees were placed 2-3 times during the peak period of corn fall, with intervals of about 10 days, two points per acre, and the total number of bees was 15,000. 3. Field spraying control larvae. At the end of the corn leaf stage, larvae are controlled by field spraying using a self-propelled high pole crop sprayer. Spraying agent can be selected BT (Bacillus thuringiensis) powder, 25 grams per acre (50000UI/mg) water spray; or use 4.5% beta cypermethrin EC 40ml/mu spray control. In strict accordance with the "Pesticide Safety Code of Practice" application.
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