With the gradual recovery of temperature, the occurrence of pests and diseases in wheat fields in the city has gradually increased. According to a survey conducted by the Plant Protection Department at the end of March, the incidence rate of wheat sheath blight has reached 96%, the average diseased plant rate is 52%, and some of the spots have been immersed in stems; the recent development of spider mites in the wheat field is fast, and the field rate is 86%. The city averages 78.6 heads. Among them, there are more than 100 in Yongcheng and Ningling, and 400 in weight. According to the observation of Yongcheng Plant Protection Station, the red spider in the wheat field has entered its incubation period. The number of wheat field locusts in the city also rose rapidly, with a 70% increase in the number of plots, an increase of 30 percentage points from 40% on March 24th, and a total of 22.8 plucks per 100 strains, a 4 fold increase over 5.6 heads on March 24; Enter the end of the damage. According to investigations conducted by the plant protection stations in Xiayi and Xiangyang, the average number of damaged plants per square meter was 8. The average number of strains was 3.7, which showed that Rhizoctonia solani and Rhizoma spp. In the hatching period, the locusts in wheat fields have entered a period of rapid development. Grasping this period of timely comprehensive prevention and control of pests and diseases is crucial for the harvest of this year's wheat. Control methods: First, we must pay close attention to the control of sheath blight and golden needleworm, available 50% phoxim 1500 times or 3000 times more than 20% of triadimefon or 1500 times. When spraying, sprayer sprayer can be screwed off to make the liquid flow down from stem base. Second, the control of cornfield spider mites and aphids can be used Omethoate or Oxygen Emulsion added triadimefon or Zhixin Star (Zhongguo Li) and other uniform spray, both powdery mildew, rust and so on.
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