Control Technology And Promotion Of Wheat Powdery Mildew And Scab In Xinyang Farm

Powdery mildew and head scab are common diseases in wheat production,in general years,wheat production can be reduced by 10%to 20%,and in severe cases by more than 50%.The toxins secreted by the head scab pathogens can also cause poisoned of humans and animals,posing a major threat to wheat production.In the past three decades,with the changes in production conditions,farming systems and climate,including the increase in the number and density of cultivation,and the increase in the amount of fertilizer,the area of wheat powdery mildew and head scab has been expanding,and the incidence has been increasing,and quickly spread to all the wheat areas of our country.Xinyang farm is located in the central part of Jiangsu Province,the climate is humid and rainy throughout the year,wheat powdery mildew and head scab cause a large loss of wheat production on the farm every year.According to the analysis of the existing plant protection data on the farm,it was found that the prevention and control of wheat powdery mildew and scab in the farm lacked the local climate and variety specificity.In order to solve the above problems,this paper investigates the occurrence characteristics of wheat powdery mildew and scab in Xinyang farm,and consults the related plant protection data of SKIAD to screen new chemical agents.It is proposed to select effective chemical agents for Xinyang farm and study the most.Good use.The main findings are as follows:Wheat powdery mildew:(1)Compared with the traditional fungicide triadimefon,30%kresoxim-methyl 25 mL/667m2,22.5%picoxystrobin 40 mL/667m2,42.8%flupiroxime and oxime ester 15 mL/667m2,17.2%pyraclostrobin and epoxiconazole 50 mL/667m2 have good control effect on wheat powdery mildew,among them,30%kresoxim-methyl is more efficient,stable and long-lasting,when the dosage is 20-25 mL/667 m2 and 20kg of water,it can achieve better control effect;(2)When 30%kresoxim-methyl is reduced in combination with Jian Wei Kang,the original dose was reduced from 30 mL/667 m2 to 15-20 mL/667 m2,and when combined with the Jian Wei Kang 15 g,the control effect was higher than that of the 30%kresoxim-methyl 15?20 mL/667 m2 alone,slightly lower than 30%kresoxim-methyl 30 mL/667m2,not only maintain a good control effect,but also reduce the cost of pesticides.Wheat head scab:(1)The incidence of head scab in red wheat is much lower than that of white wheat,the disease rate is 703.84%lower,the disease index is 686.43%lower,and the more precipitation and precipitation days,the higher the disease rate;(2)In a single agent,the control effect of 25%prothioconazole 80 mL/667m2,43%tebuconazole 50 mL/667m2,25%phenamacril 100 mL/667m2at a usual dose is higher than 40%carbendazim 125 mL/667m2,in the compounding agent,37%amidazole and imidazolium 80 mL/667m2 and 42%pyrazole and carbendazim 80 mL/667m2 were also significantly higher than 40%carbendazim 125 mL/667m2;(3)The control effect of the diseased finger treated with 25%phenamacril 200 mL/667 m2 and 25%phenamacril 100*2 mL/667 m2 in the flowering stage was higher than other treatments,but the improvement of head scab resistance was considered,at present,it is recommended to start with a dose of 100 mL/667 m2 from the flowering stage,and control 2-3 times;(4)The control effect of carbendazim on wheat head scab is better when the weather is fine,but its efficacy period is short,and the control effect after reduction combined with Jian Wei Kang has not improved.