Watershed watermelon locust harm is more common, not only directly sucking juice causing serious water loss and malnutrition of the plant, but also induce other diseases, often after harvesting 1 to 2 batches of melons is difficult to form the output, has become the main impact on watermelon production Pests should be controlled in time.
1. Physical control: Hanging silver-gray plastic strips in vents of greenhouses can avoid aphids and reduce the amount of maggots. Set 40 to 45 mesh silver-gray or white insect nets at the gates and vents to prevent locusts from entering the shed. Using the winged crickets to yellow tropism, trapped with a yellow plate.
2. Chemical control: use 10% imidacloprid WP 2000 times, or 20% fenpropathrin EC 2000 times, or 50% WP WP 2500 times, or 10% niacin EC 500~1000 Double spray control. Aphid breeding ability is strong, there are many generations, it is easy to produce drug resistance, pay attention to alternate rotation of medication. Aphids are generally concentrated on the heads, tender leaves, young stems, and dorsal parts of the melon seedlings. The application of these parts should be emphasized. Closed canopy with good sealing effect can be used to close the shed in the evening, with 10% dichlorvos smoke agent 400-500 grams per acre smoke prevention and control, the next morning ventilation. In the early stage of locust damage, smoked once every 6~7 days, and continuously smoked 2~3 times.
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