Study On Occurrence Regularity Of Crop Diseases And Pests In Shaoyang Of Hunan Province

The forecast of diseases and insect pests is the basis for effective prevention and control of the occurrence and development of harmful organisms,and is also the premise of agricultural production management and decision-making.According to the occurrence of major crops diseases and insect pests of from 2014 to 2016 year in Shaoyang City of Hunan province,especially rice diseases and insect pests,Chilo suppressalis and Southern Rice Black Streaked Dwarf Virus were the main diseases and insect pests of rice in Shaoyang City in recent years,and became the bottleneck problem in Rice production in Shaoyang City.The main reasons causing number increasing of Chilo suppressalis were mainly due to increased planting area of middle-season rice and Single cropping rice,different sowing and transplanting period,and increased planting area with throw-planting and no-till gardening.The main reasons causing serious Southern Rice Black Streaked Dwarf Virus were mainly due to spread the virus of migratory pests because of increased planting area of middle-season rice and Single cropping rice and different sowing and transplanting period.Therefore,combined with the forecast data,targeted use of different control strategies to prevent the main crop pests,ensure sustainable crop production,it has important significance to solve the "three rural issues".