Heilongjiang Provincial Phytosanitary Plant Protection Station monitoring, this year, the province's rice stem borer, although the base is low, but the degree of occurrence of the local area has been rising. According to experts, the appropriate period for the control of rice borer larvae is from the middle of July to the beginning of August, and it should be prevented and killed by using insecticides to kill larvae and lamp-light adults.
It is understood that there was less snowfall in Heilongjiang in the winter of last year, which was favorable for the survival of rice stem borers. The survival rate after the winter reached 86.8%, which was 1.8 percentage points higher than the annual average.
Weather and cultivation conditions also favor the occurrence of rice stem borer. According to the meteorological department's forecast, the rainfall in July in Heilongjiang Province is slightly more, which is favorable to the metamorphosis and larvae hatching of rice. In the early period of low-temperature and rainy weather, the growth of rice was weak, and the amount of nitrogen fertilizer used by some farmers was too high, which resulted in the greenness of rice plants and the growth and reproduction of the beneficial rice borer.
Experts from the Heilongjiang Provincial Phytosanitary Plant Protection Station recommended that local governments should increase the field investigation and guidance of technical personnel to accurately grasp the development of the field of rice borer borer. Timely removal of dead plants, such as dead stems and dry ears, reduces the amount of insects and prevents the larvae from transferring to other plants.
According to experts, rice larvae can be exterminated by insecticides. In the early stage of emergence of rice borer borer, the projectile insecticidal lamp can be placed near the straw pile to trap and kill adults, or in a rice field, a trap lamp can be set for every 50 acres of insecticidal lamp.
It is understood that there was less snowfall in Heilongjiang in the winter of last year, which was favorable for the survival of rice stem borers. The survival rate after the winter reached 86.8%, which was 1.8 percentage points higher than the annual average.
Weather and cultivation conditions also favor the occurrence of rice stem borer. According to the meteorological department's forecast, the rainfall in July in Heilongjiang Province is slightly more, which is favorable to the metamorphosis and larvae hatching of rice. In the early period of low-temperature and rainy weather, the growth of rice was weak, and the amount of nitrogen fertilizer used by some farmers was too high, which resulted in the greenness of rice plants and the growth and reproduction of the beneficial rice borer.
Experts from the Heilongjiang Provincial Phytosanitary Plant Protection Station recommended that local governments should increase the field investigation and guidance of technical personnel to accurately grasp the development of the field of rice borer borer. Timely removal of dead plants, such as dead stems and dry ears, reduces the amount of insects and prevents the larvae from transferring to other plants.
According to experts, rice larvae can be exterminated by insecticides. In the early stage of emergence of rice borer borer, the projectile insecticidal lamp can be placed near the straw pile to trap and kill adults, or in a rice field, a trap lamp can be set for every 50 acres of insecticidal lamp.
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