Rice Pest Occurrence And Prevention And Control Measures Survey In Jiangzhou District Of Chongzuo City Inrecent Ten Years

Rice is one of the most important crops in Jiangzhou District of Chongzuo City, rice planting area accounted for 13.4% of the total planting area of crops. But the rice pests and diseases of serious harm, the annual rice yield loss of 7 tons or so. The situation of damage on the major rice pests in Chongzuo City for nearly a decade for the systematic investigation and analysis, results show that, in recent years, Chongzuo Jiangzhou District of main diseases and insect pests of rice damage occurs has the following characteristics:(1) Cnaphalocrocis medinalis is the main local recurrent pests, on rice yield effect, in 2007 and 2008 outbreak, lead to crop failure in some plots. (2) the occurrence of rice planthopper is also more common,2007 at late growth stage of rice planthopper occurrence, resulting in serious rice lodging, grouting is not full, resulting in severe reduction of rice output. (3) on century 80,90 borer in the local occurrence, over the past decade has declined, is moderate, but varied a little, borer infestation algebra by the original three generation of variable for 4,5 generation. (4) before the three main diseases of rice, rice blast, white leaf blight disease occurrence is on a downward trend, sheath blight occurrence showed an upward trend. (5) some secondary diseases such as the upward trend in the incidence of rice stripe blight, rice smut, BLS and, especially in 2013 and 2014 BLS outbreak, pose a serious threat to rice production.This article in the analysis of Jiangzhou District of Chongzuo City in the past ten years of main diseases and insect pests of rice damage occurred succession rules based on analysis of main diseases and insect pests in succession change harm; in the light of some problems existing in recent years, the local control of rice diseases and pests proposed in under the new situation of prevention and cure rice main pests and diseases of some scientific and specific prevention measures and application recommendations to local formulation of rice diseases, insect pests and pests prevention and control strategies and the choice of prevention and control measures to provide a reference, provide support to protect the safety of rice production.