Wheat midge is a devastating pest during the growth of wheat. It occurs once a year. The larvae lurk in the glume and suck grazing wheat sap or damage flower organs, causing pods and empty shells, which seriously affect wheat yield and quality. . In order to effectively control its hazards, it is critical to accurately grasp the two critical periods of prevention and control.
In the flood season, the appropriate period for prevention and control is expected to be in the middle or late April (wheat booting stage). Each plot has two or more plots of insects and timely chemical control. Acres with 5% chlorpyrifos granules 1.5 kg or 3% phoxim granules 3 kg, mix fine soil 20-25 kg can also use 40% chlorpyrifos emulsifiable concentrate or 50% phoxim EC 250-300 g, mix fine sand 20-25 kg, evenly spread on the surface. Watering immediately after application can increase control efficiency.
Adult stage control is expected in early May (wheat heading to flowering period), which is an appropriate period for adult control. Hand to open the ridge of the wheat ridge to see a field of more than 2 adults, timely spray control. Spray with 10% imidacloprid 1000-fold, 50% chlorpyrifos 1500-fold, or 4.5% beta-cypermethrin 1000-1500 times and spray control before 11am or after 4pm.
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