Wheat scab is one of the major diseases of wheat. If it is not properly controlled, it will cause serious yield loss and quality impact. Recent surveys have found that farmers still have many misunderstandings in the prevention and control of head blight.
Misunderstanding 1: Retreatment of light defense, seeing medication, missed the best period of prevention and treatment.
Wheat scab can be prevented from being ruled out. Prevention should be taken as the main factor, and active defense should be taken. The choice of drug use period will directly affect the level of control effect. Numerous data indicate that the period of application of head blight is heading from "heading period to flowering period." Within such a long period of drug use, there are significant differences in the effects of drug use at different time periods. Some farmers chose to use drugs at the booting stage or at the end of Yanghua period, and even after seeing the pink mold layer, they did not take the best control period and the control effect was low. Through field surveys, it was found that the best period for prevention and treatment was when wheat reached to 5% of its bloom. When the heading period meets the rainy weather, when scab has an epidemic possibility, spray the medicine rather sooner rather than later, do not wait until the weather is fine or when the flower is sprayed again, the rain gap should be sprayed repeatedly to prevent and cure; if the use of sucking is good, The period of long-acting drug control can be advanced to the ear of wheat.
Misunderstanding 2: Blindly selecting drugs, ignoring the problems of drug resistance and complementary mechanisms of action.
At present, there are carbendazim, thiophanate-methyl, and thiram in the prevention and treatment of wheat scab. In recent years, peasants have generally complained that carbendazim is not working well and that other pharmaceutical agents are not effective. This can not rule out the existence of problems in the quality of some pharmaceutical agents. The relationship between resistant strains should also be considered, and the mechanism of action should be ignored by farmers. There is a close relationship between the use of the Pharmacy compounding.
Spraying carbendazim and other benzimidazole fungicides is one of the key measures for preventing and controlling wheat scab in China since the 1970s. After 20 years, the problem of resistance to benzimidazole fungicides has attracted much attention. In areas where the efficacy of certain agents is reduced, it is recommended to pay active attention to new species, such as tebuconazole prochloraz (Zammi), Cyanogenate (Jin protection), enecarbazone esters, etc. At the same time, it is necessary to pay attention to the correct mixture of different mechanisms of action and to ensure that the drugs used have the multiple functions of systemic treatment and protection eradication, and completely prevent the spread of diseases.
Misunderstanding 3: The water consumption of mu is less, which is not conducive to the play of efficacy.
Through the visit, it was learned that some wheat farmers used conventional sprayers to spray more than 15 liters of water per mu, and even less were only 10 liters. Such a small amount of water consumption would affect the normal exertion of drug efficacy. In order to ensure efficacy, the amount of water used per mu for conventional sprayers should be between 45 liters and 60 liters, or drug efficacy assurance agents such as shampoo should be added.
Misunderstanding 4: Can not correctly grasp the number of medications.
There are no fixed standards for the number of medications, and the factors such as the amount of bacteria, incidence, and the effect of chemical control should be taken into consideration. It is necessary to carry out two preventions and controls for land masses with heavy onset in previous years, and pay attention to supplemental spraying after the rain for the first time. Bad remedial measures should be taken promptly. The second dose should be used about 7 days after the first dose, which can better control the spread of the disease and reduce losses.
Egg Roll,Cracker Cookies,Cookie Cracker,Cookies And Crackers
JINJIANG XIEXIANG TRADE CORP., LTD. , https://www.xiexiangfoodstuff.com