Study On Green Control Technique Of Rice Pests In Yu’an District Of Lu’an City In 2018

The paper by field survey,combined with historical data of Yu’an district,Lu’ an city,analyzed the species county rice pests,the dominant populations and the occurrence of major pests in 2018,assembling the green control technique and production increase technology developed along the Huai River season rice pests.The main results were listed as follows:1.In 2018,rice pests were found 26 species belonging to 6 orders,15 families and natural enemies were found 16 species belonging to 3 classes,6 orders,12 families by preliminary investigation in Yu’an district,Lu’ an city.The dominant populations were white-backed planthopper,brown rice planthopper,striped stem borer and the rice leaf roller.They are the important pests and should be prevented and controlled.Common pests were the rice thrips,rice black bug and rice grass shopper,which can cause obvious damage in some towns and villages.Pink borer have a tendency to increase the harm.2.In 2018,the control index of total growth period did not reach about rice planthopper,but it lighty occurs.It is the main hazard generation about generation 5(3)of the rice leaf roller,the generation 6(4)have a tendency to increase the harm.About the striped stem borer,generation 2-3 are the main hazard generations,but the degree of harm is still declining.The harmful situation of rice pests can be roughly divided into three stages:rice thrips mainly attack rice seedling stage to early tillering stage,and affecting the growth trend of rice seedlings;it is time to be attacked at rice tillering stage,booting and rupturing stage to filling stage by rice planthopper,striped stem borer,rice leaf roller and rice black bug,etc.Especially the final stage has a great effect on rice yield,It is a key period for the prevention and control of rice pests.Although there are many natural enemies in rice fields,in the natural state,the control effect is not obvious.About the green control technique system on the primary pests,we should not only focus on protecting and utilizing natural enemies,but release artificially of high-efficiency natural enemies.3.The main pest problem in rice fields can be solved by 60%Imidacloprid suspension concentrates for seed dressing(Gaoqiao(?)),35%Chlorantraniliprole WG(You Fukuan(?)),80%Pymetrozine and nitenpyram WG(Jirui(?)).Among them:35%Chlorantraniliprole WG has good prevention and control of striped stem borer and the rice leaf roller,6g per 667m2.60%Imidacloprid suspension concentrates for seed dressing has good prevention and control of rice thrips and make rice seedlings grow better.80%Pymetrozine and nitenpyram WG has good prevention and control of rice planthopper,and it is fast-acting and long-lasting.After using many times in a season,the economic benefits(mu benefit and investment ratio)are more significant,mu income is more than 89 yuan than the self-medication area and reduce the use of pesticides,it is in line with the requirement of"zero growth of pesticides" and could be widely applied to rice on a large scale.4.It is clear that the main pest control rate is over 90%in 2018,and the overall prevention and control effect is over 85%,the pest damage rate is controlled below 3%,and the specialized defense prevention area is over 40%,achieving the goal of prevention and control of rice pests with zero growth in chemical pesticide.Established the general principles for the management of rice pests and diseases that adhere to the"prevent in the seedling stage,relax of the tillering period,and protect of the booting stage".Focus on the rice field ecosystem and based on agricultural prevention and control technology,non-chemical control technologies such as resist(tolerant),fitness cultivation,ecological regulation,physical and chemical induction,and biological control are chose,improve the natural control ability of rice field ecosystems.Under the premise of accurate measurement and reporting,aiming at the rational use of high-efficiency and low-risk pesticides,controlling major pests and treating both permanent and secondary pests,promoting the integration of green prevention and control and specialized defense and prevention,ensuring rice green synergy and rice fields green prevention and control strategy for ecological security.Based on non-chemical control technology,through accurate measurement and reporting,we seized the key period and scientifically and rationally used chemical pesticides to assist the green pest control technology of rice pests.