Wheat midge is a devastating pest that lurks in the husk of wheat and sucks the sap that is filling grain, causing wheat to form pods and empty shells, resulting in reduced production or even no harvest. Although the majority of farmers attach more importance to the prevention and control of midge insects, there are some farmers who have the following misunderstandings that affect the effectiveness of prevention and control and should attract attention.
Misunderstanding 1: Prevention and treatment of insecticides during re-infestation and control of poisonous soil during light pests. Each growth stage of wheat midge is consistent with the growth and development of wheat, that is, at the booting stage of wheat, and the emergence of midge by midge; wheat heading, feathering of midge, initial stage of wheat filling, and hatching of larvae. Prevention and control of the midge must adhere to the pest prevention and adult control strategies, do a good job of these two links in order to improve the control effect. Individual farmers do not control the spread of poisonous soil during the infestation period and rely solely on adult insecticides to prevent and control insects. As a result, the number of insects that cause eclosion is high, which increases the difficulty of control. Therefore, pest control is critical.
Misunderstanding 2: Action delays, unable to grasp the critical period of prevention and control. The key period of prevention and control of wheat midge insects is short, the infestation period is about 7 days, and the adult period is about 3 days. These two links are also the weakest links for the survival of the midge insects, and it is the best time for prevention and control. Once the plant protection department issues a pest forecast, it must act quickly. Once it is delayed, it will inevitably miss the best opportunity for prevention and control.
Misunderstanding 3: Blind medication, operation is not standardized. At present, there is a shortage of pesticides for controlling the insecticides and insecticides in soils, which makes it difficult for farmers' friends to select them and aggravates the phenomenon of indiscriminate use of drugs. The control effect is poor. According to the test, the current pesticides for pest control period are 2.5% methylisoflusis granules and 5% chlorpyrifos granules. Adult stage control uses 5% beta-cypermethrin or lambda-cyhalothrin mixed with dichlorvos and imidacloprid to prevent midge insects and aphids. When spreading poisonous soil, do not use dew to prevent pesticides from sticking to the leaves to cause phytotoxicity and affect the efficacy of the drug. At the same time, poisonous soil scattered on leaves shall be dropped on the ground in order to fully exert its efficacy.
Misunderstanding 4: Spraying less water will affect the effectiveness of the drug. Spraying medicine to control the midge, the wheat strain is dense, and the adult activities are in the wheat plexus. It must be thoroughly sprayed thoroughly. Some farmers only use one sprayer solution per acre, but they can't spray it thoroughly, which seriously affects the efficacy of the drug. The amount of water used per mu for conventional sprayers should be 45-60 kg.
Misunderstanding 5: Only spraying, do not check the control effect. Some peasant households control the midge insects and think that spraying the medicine is all right. They do not pay attention to checking the control effect. It is necessary to check the control effect on the second day after spraying. If one or two adult worms can be seen at one time, it indicates that the control effect is not good, and it is necessary to immediately perform supplementary spraying.
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