The two pests of strawberries in the greenhouse should be carefully guarded.
Aphids mainly include peach aphid and cotton aphid, which harm leaves and petioles. Aphids can not only cause harm to strawberries, but more importantly, they can spread strawberry virus disease, so it must be strictly controlled in production. Aphids can occur seriously under high temperature and dry conditions. Spray control with 3000 times of 3% acetamiprid EC, 20000 times of 70% amyl water dispersible granules, or 2500 times of imidacloprid wettable powder. Can also hang yellow board to lure aphids. There are many kinds of leaf mites that harm strawberry, the common ones are two-spot spider mite and cinnabar spider mite. Leaf mites are very small and like to absorb juice on the young leaves or on the back of the leaves. Accelerated reproduction under high temperature, rampant harm. The damaged leaves were reddish brown, curled and withered, and the growth and development of the plant was significantly hindered. In particular, Tetranychus urticae has a wide range of recipes and strong drug resistance, which must be paid great attention to. After flowering, in order to protect the honey peak, insecticides that are very safe to bees must be used, which can be sprayed with 5% carotene EC 1000-1500 times, and sprayed again every 7-10 days.
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Control techniques of Strawberry Red Spider in greenhouse
Harmful symptoms: Botrytis cinerea can occur at any time from flowering to fruit development. Most of the disease starts from the flowering stage, and the pathogen initially infects the failed flowers or weaker parts, causing the flowers to show light brown necrosis and rot, resulting in a gray mildew layer. Most of the leaves invade from the old yellow leaves at the base, forming V-shaped yellow-brown spots, or from the petals.
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Key points of Sugarcane Management in Autumn
Key points of Sugarcane Management in Autumn
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