Affected by meteorological conditions, this year's corn borer is 4-5 days ahead of the previous year's emergence time. It is expected that the first generation of corn borer will be in the early stage of July and will be biased.
From December 1st, 2011 to February 21st, 2012, the rainfall in the city is extremely low, and the meteorological conditions are not conducive to the survival of the corn borer. However, due to the high winter base, the survival rate after the spring recovery is still high; 2012 4 From the 17th of the month to the 31st of May, 2012, the rainfall is slightly higher than the temperature. The hydrothermal conditions are more suitable for the larvae of corn borer larvae; since June, the temperature is slightly lower and the precipitation is more, which is more favorable for the occurrence and development of corn borer; The corn glutinous rice emergence time in our city is advanced.
According to this year's corn carp emergence time and spawning time, Dehui City Promotion Center initially decided to cast Trichogram bee twice on July 3 and July 9, in order to ensure the smooth release of Trichogramma in fine weather, the meteorological department is close Pay attention to the weather changes, and report the weather changes in the first half of July to the leaders of the general commander-promotion center.
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