According to recent monitoring in various places, the amount of eggs in some fields and transplanted Honda worms is high, and it is about to enter the dangerous period. Among them, the amount of insects, the first generation of adult worms and the number of eggs dropped in the area of ​​Huaibei, hilly and some areas along the Yangtze River in Huaibei, hills and areas along the Yangtze River, will enter the peak of egg hatching in the near future, and the large scorpion in southern Jiangsu, along the Yangtze River and coastal areas will increase; Harvesting, Laodelphax striatellus will be concentrated to the field of pests, the amount of insects will rise further, aggravating the risk of viral disease; the incidence of rice blast at the local susceptible varieties in hilly and riverside areas. Grasping the rice seedling stage and the early control of pests and diseases in the field is an important means to cultivate strong seedlings and lay a solid foundation for high yield. All localities need to strengthen the monitoring of diseases and insects in the early stage of rice growth, and use the "give medicine" and Honda early disease. Insect control work.
Occurrence analysis
1 generation of locusts
In winter, the average amount of live insects in the province was 263, which was 1.7 times higher than that of the previous year. Among them, the amount of insects in hills and Huaibei was higher, and the number of insects was more than 500. The East China Sea and the Yellow Sea were 936.4 respectively. Head, 5, 633.7 heads. As of the beginning of June, the total number of insect traps in the stems of Chihuahua was 100-600, and the hills and Huaibei were 1,500-3,000, such as 1,793 in Yizheng and 2,830 in Sucheng, which was generally 20%-80% of the previous year. The number of insects in the Huaibei area of ​​the county, Xinyi, Suining was 2 to 5 times that of the previous year; the single sex attractant accumulated 120-470 heads of adults, which was about 50% of the previous year. In the survey of the number of eggs in Putian, the number of eggs in the fields along the Yangtze River, hills and Huaibei was higher. The number of eggs per mu was 60-250, which was 60%-80% of the previous year. The number of Yizheng was 1,360, which recently entered the incubation period. In the middle and late June, there is still a generation of adult tail peaks that continue to feather and lay eggs, which increases the extent of the occurrence of polders.
The average amount of live insects in Datun is 31, which is lower than the previous year's 97, which is higher in southern Jiangsu, along the Yangtze River and along the coast. The amount of insects in the area is 100-120, and in other areas it is mostly 10-20. As of the beginning of June, 120-550 heads of single insects in southern Jiangsu, along the Yangtze River and along the coast, 180-500 heads of single adult attractants, generally 1.5 to 2 times last year, and the development process is extremely irregular. Since the beginning of May, it has been hatching since the beginning of May. According to Zhangjiagang's investigation on the vetiver in early June, the rate of sputum killings was 78.2%, and the rate of mites was 9.8%.
2 Laodelphax striaes and viral diseases
In the second half of May, the province's census, the majority of the wheat field, the number of insects in the wheat field is between 0 million and 10,000 heads, lower than the same period of the previous year, the lowest since 2004. However, due to the high ratio of wheat field to Dianchi Lake, the area per unit area is high. According to the survey, on June 5th, the amount of buckwheat in some areas of hills and Lixiahe is relatively high, and the amount of insects in the transplanting field of Pukou hybrid japonica rice is 400,000. There are 240,000 heads of Jianhu dry nursery field and 216,000 heads of Jinhu dry nursery field. At present, the peak value of wheat harvest is high. The gray planthopper will be concentrated from wheat fields to Putian, early planted Honda and direct seed rice fields. The insect population will continue to rise, increasing the risk of virus disease.
3 Rice blast
On the hills and in some areas along the river, there are rice blast episodes on the susceptible varieties. For example, on May 23, Pukou found the disease center in the hybrid rice cultivating field, and the disease period was slightly earlier than in previous years.
Prevention opinion
1 Strengthen monitoring report
According to the requirements of the measurement and reporting standards, we must conscientiously carry out systematic monitoring of relevant pests and diseases and field census work, and timely understand the growth and occurrence of pests and diseases, and provide a basis for prevention and control decisions. It is necessary to strengthen information exchange, conduct consultations in a timely manner, and improve information accuracy.
2 Strengthen classification guidance
It is necessary to strengthen the classification and guidance of different types of fields and different pests and diseases, and to grasp the appropriate period of drug use, mainly to produce aphids and Laodelphax sinensis, taking into account the prevention and control of pests such as rice blast and rice locust in seedling stage, and use them well before transplanting. "Give the medicine", do the medicine transplant. According to the 2018 provincial green prevention and control product recommendation list, select high-efficiency, low-toxic, low-residue agents, and the aphids can choose emamectin benzoate, chlorantraniliprole, avermectin, and oxytocin. A single agent or compounding agent such as hydrazide; a single or a mixture of pymetrozine, dinotefuran, nitenpyram, trifluoropyrimidine or the like; or tricyclic azole or rice blast can be selected for rice blast A single agent or a compounding agent such as an amide or azoxystrobin. According to the requirements of the " Pesticide Management Regulations", scientific use of drugs, the use of adequate doses, and pay attention to the use of drugs, delay the emergence of resistance.
3 Strengthen professionalism and rule
The implementation of unified prevention and control, contiguous prevention and control, can significantly improve the control of pests and diseases. It is necessary to actively organize and guide specialized prevention and treatment service organizations to carry out centralized and efficient services, improve the coverage of specialized treatment of major pests and diseases of rice, comprehensively improve the effectiveness and efficiency of prevention and control, and improve the utilization rate of pesticides.
(Source: Jiangsu Plant Protection Plant Quarantine Station)
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