Occurrence Rule And Biological Control Measure Of Main Diseases And Insect Pests On Luochuan

Insect pests and diseases of apple trees is one of the key links in the high efficiency and high quality.To be mastered the growth and decline law and biological control effect of the main pests and diseases on the Weibei Rainfed Highland,this study choose two apple orchards in luochuan county shaanxi province.One is apple test station of the Northwest A&F University,another is yan'an fruit proving ground.The main application of natural enemies of insects and insect sex pheromones and biological pesticide to research apple diseases and insect pests biological methods,provide a reference basis for the apple greenpollution-free production.1.This study observed the growth and decline law of Apple yellow aphid,which occurred from late April to late June in luochuan apple producing area.Among them,the outbreak peak of Apple yellow aphid was from early to late may.It was found that the natural enemies of Lady beetles were placed in the orchard where Apple yellow aphid occurred.Apple orchards with a shoot rate of 40%could be sprayed with the plant pesticide-sulfoxaflor,which could protect the natural enemies of Lady beetles while eliminating Apple yellow aphid.2.The army worm trap with the sex pheromone of Carposinasa sakii Matsumura was hung in the orchard.According to the field monitoring,the beginning and end of the occurrence of field adult insects was from early may to early September in luochuan apple production area in 2018,and the peak of the population of Carposinasa sakii Matsumura was from June to August.There were 3 obvious peaks in the field.By hanging the trap of sex pheromone of different densities,it was found that set 10/667m~2 had the best effect on the prevention and control of Carposinasa sakii Matsumura.3.The army worm trap with the sex pheromone of Lithocolletis ringoniella Mats was hung in the orchard.Through field monitoring,it was found that in 2018,there were 5generations of adult worms in the field of luochuan apple production area in a year,with an average of 1 generation in a month,with overlapping generations.The overwintering generation started from early may to early June,and the fourth generation began to overwinter in leaf leaves as pupae after September.The whole stage of occurrence is from early may to late October.By hanging the traps with different densities,it was found that set 10/667m~2 has the best effect in preventing and controlling the Lithocolletis ringoniella Mats.4.Root irrigation and foliar spraying with 0.1%Atailing reagent had the best control effect on Apple painted-face disease.The growth of apple was promoted by Atailing reagent.