Heyang: Pay attention to the prevention and control of wheat strip sand leafhopper diseases and insect pests

This year, due to the small amount of rainfall and high temperature in the autumn seedling stage of wheat, as well as the high stubble of wheat before the wheat field, the large area of corn straw returning to the field, and the extensive preparation of wheat before sowing, the occurrence of field blocks in the wheat autumn seedling stage of wheat strip sand leafhopper in Heyang County is common, the insect population density is large, and the base number of insect populations before winter of wheat strip sand leafhopper is only lower than that of the same period in 2013, which is the second high incidence year in the same period in the past 20 years. Sand leafhopper likes arid and warm climatic conditions, so that adult and nymphs absorb wheat plant stems and leaf sap, and dry yellow spots appear in the affected parts, affecting plant growth and development and photosynthesis, and spread wheat blue dwarf virus disease, causing leaf yellowing, plant dwarfing, and reducing yields by 20-30% in mild field blocks. Wheat blue dwarf virus can only be transmitted permanently through the sand leafhopper, the shortest poisoning period is 10 seconds, the virus circulates in the insect body for 2-8 days, the disease incubation period is 19 days, and the leafhopper can be poisoned for life once it is poisoned. Sand leafhoppers not only directly harm wheat plants, suck the juice of wheat plants, but also indirectly spread blue dwarf virus disease, which poses a serious threat to wheat growth. In this regard, it is hoped that leaders at all levels and the broad masses of peasants will pay close attention to the dynamics of the occurrence of sandhoppers in wheat during the overwintering period, make preparations for the prevention and control of sandhoppers in wheat fields as early as possible, and promptly carry out prevention and control of fields where sandhoppers in wheat fields reach the control target of 10 heads per square meter, so as to ensure the safe overwintering of wheat and the safe growth of wheat in the coming year.

Prevention and control technical measures: (1) pharmaceutical prevention and control. For fields with a population density of 10 heads per square meter, 1500 times 20% butyric Budweiser emulsion, 500 times 30% acetaminephosphate emulsion, and 10% imidacloprid wettable powder 1000 times liquid spray were selected for control. At the same time, in order to prevent the influence of adverse climatic factors on wheat in winter, 5% amino oligosaccharide water agent 750-1000 times liquid or Tianda "2116" 1000 times liquid mixed spray can be added to spray. The amount of spraying liquid per mu is 20-30 kg, and the spraying time is appropriate from 10 a.m. to 4 p.m. on sunny and breezy weather. (2) Agricultural control. Do a good job in winter irrigation, expand the irrigation area, and create an ecological environment that is not conducive to the occurrence of sand leafhoppers in wheat fields. (Fan Wugang)