The distinction between vegetable pests and diseases is as follows: Ball Valve ,Steel Ball Valve,Stainless Steel Ball Valve,1 Inch Ball Valve Zhejiang Chenxiang import and export trade Co., Ltd , https://www.chenxiang-valve.com
Earthworms are usually parasitic on the back of the leaves of vegetables. The leaves of the young leaves are damaged, the leaves become smaller and the color is thicker, the texture becomes harder, thick and brittle, and the plants grow poorly. When the virus disease is harmful, the leaf margin of the damaged young leaves is generally rolled up, showing a deformity, the leaves are lighter, and the veins are brighter.
Control: After receiving confirmation vegetables mites damage, 73% of the available propargite EC 400-500 mg / l, 5% EC flufenoxuron 667-1000 mg / l, 0.9% soluble agent 250 g of mite squire 333 mg / liter solution spray control. After confirming that it is a viral disease, it can be used on the basis of disease control (such as aphids, whitefly, etc.), 200% of virus A wettable powder 1000 mg / liter plus carapace 333 mg / liter, 0.5% of plant disease Ling emulsion 1000 mg / liter plus Kang Debao phytonutrients 1000-1667 mg / liter solution spray control.
The distinction between nematodes and bacterial wilt and blight can be caused by bacterial wilt, wilt and nematodes, but the first two are infectious diseases. After the plants are damaged, the vascular bundles gradually become brown, and the pre-injury is noon. It returned to normal in the morning and evening, and continued to languish in the later period. The diseased stem is longitudinally cut and placed in a clear glass containing clear water. If the mucus overflows, it is a bacterial wilt. If there is no mucus overflow and the lower leaves of the plant turn yellow, it is wilt. In the early stage of nematode damage, the aboveground plants are poorly grown, the leaves are smaller than the leaves of normal plants, and the roots are reduced. Some nematodes can form "beaded" tumors on the fibrous roots; some nematodes are at the junction of the main roots and lateral roots. Cortical foraging causes damage to the cortical tissue.
Prevention and control: Vegetables with serious wilt disease such as cucumber and watermelon can be grafted with black seed pumpkin and vegetable gourd for prevention and treatment. After the occurrence of bacterial wilt, on the basis of reducing the humidity in the field and avoiding the flooding of large water, 77% of the pesticide can be used to kill the wettable powder or 25% of the Qingchangling wettable powder 1667-250. Mg/L solution, 200 g per plant. Nematodes can be controlled with 10% anti-line spirit (green collecting treasure).