According to the occurrence of the generation of armyworm on the Yangtze River and the Huai River Valley in the National Agricultural Technology Center, combined with the monitoring results of the insect pests in various parts of Heilongjiang Province and meteorological conditions, it is expected that the second generation of the armyworm will occur in Heilongjiang Province with moderate to moderate incidence. Large areas of tribal eggs, suitable areas for abundant crop precipitation will cause certain damage. The larval control period is around June 15~25. The major hazard crops are grass crops such as wheat, corn, sorghum, and wheat bran.
According to monitoring, the second generation of adult insects in Heilongjiang province began on May 23, slightly later than usual. At present, most of the adult ovaries develop more than 3 levels, and all areas of the valley grass have not yet attracted eggs, and some southern counties have emerged as young larvae. Recently, there are more rainy weather, suitable temperatures, and weather forecasting that there will still be more rainy weather in the next week, which is more conducive to the occurrence of armyworm.
In view of the fact that the armyworm has the hazards of concentration, concealment, and outbreak, most local spots occur. To this end, experts from the Plant Protection Station of Heilongjiang Province suggested that the plant protection agencies throughout the country should strengthen the publicity and guidance of adult worms and estoogues, and organize well the peasant households. They should go deep into the fields and plots and investigate worms carefully to achieve prevention and control. The field of indicators, timely prevention and control, and early preparations for the monitoring and prevention of three generations of armyworm. Experts suggested that farmers' friends can take ecological and agricultural control on the one hand. During adult spawning, weeds can be set in the field to trap eggs. During the larval stage, weeds and weeds can be used to turn the weeds and their larvae under the soil. On the other hand, medicaments can be used for control. The best time for application is when most larvae are around the 3rd instar. The biological pesticide 50,000 IU/mg Bt powder can be selected to be sprayed during the egg hatching period; the chemical agent is better with pyrethroid pesticides or a mixture of pyrethrin and organic phosphorus, such as 5% beta cypermethrin.
According to monitoring, the second generation of adult insects in Heilongjiang province began on May 23, slightly later than usual. At present, most of the adult ovaries develop more than 3 levels, and all areas of the valley grass have not yet attracted eggs, and some southern counties have emerged as young larvae. Recently, there are more rainy weather, suitable temperatures, and weather forecasting that there will still be more rainy weather in the next week, which is more conducive to the occurrence of armyworm.
In view of the fact that the armyworm has the hazards of concentration, concealment, and outbreak, most local spots occur. To this end, experts from the Plant Protection Station of Heilongjiang Province suggested that the plant protection agencies throughout the country should strengthen the publicity and guidance of adult worms and estoogues, and organize well the peasant households. They should go deep into the fields and plots and investigate worms carefully to achieve prevention and control. The field of indicators, timely prevention and control, and early preparations for the monitoring and prevention of three generations of armyworm. Experts suggested that farmers' friends can take ecological and agricultural control on the one hand. During adult spawning, weeds can be set in the field to trap eggs. During the larval stage, weeds and weeds can be used to turn the weeds and their larvae under the soil. On the other hand, medicaments can be used for control. The best time for application is when most larvae are around the 3rd instar. The biological pesticide 50,000 IU/mg Bt powder can be selected to be sprayed during the egg hatching period; the chemical agent is better with pyrethroid pesticides or a mixture of pyrethrin and organic phosphorus, such as 5% beta cypermethrin.
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