Leaf mold is a common disease on tomato, although it does not directly infect the fruit, but it will lead to reduced leaf function, thereby affecting yield and quality. The farmer households often have difficulty in controlling leaf mold, and the effect is not obvious after spraying. The main reason for poor control effectiveness is mainly due to improper control methods. Attention should be paid to the following four points when applying pesticides. Symptoms of the drug for the prevention and treatment of tomato leaf mold are many, of which there are chlorothalonil preventive, therapeutic carbendazim, fluorosiliconazole, difenoconazole, etc., according to the need for targeted selection. Early prevention and treatment of tomato leaf mold is an airborne disease. Once the disease is infested, the disease will quickly spread if there is enough humidity in the shed. To prevent tomato leaf mold, a preventive drug should be sprayed every 10 days from the beginning of the seedling stage; the first to the second ear of the flower should be strengthened for prevention during fruit setting and sprayed once every 7 days. After the lesions appear on the lower leaves, spray the therapeutic agent early. The tomato leaf mold in the spraying site mostly begins from the lower leaves of the plant, and is usually the first onset in the southern shelf angle. Therefore, the focus of spraying prevention is the plant's lower leaves and plants south of the greenhouse. The key spray protects the upper middle functional leaf. Prevention of phytotoxicity Many azole bactericides have high efficacy against tomato leaf mold, but such bactericides (except difenoconazole) usually have an effect on inhibiting tomato growth. Therefore, it is impossible to continuously spray a large amount of azole fungicides during the expansion period of tomato fruit so as not to inhibit the fruit enlargement.
We supply many types of brass gas valve. Commonly, we make NPT thread for America customers, make BSP or BSPT thread for Europe and Asia customers. Our products is produced by CNC machine.
Size 1/4'' to 2'', all bodied and caps are produced by forge technics.
Size 21/2'' to 4'', they are made by casting technics.
Working pressure: 16Bar-25Bar( 150#WSP, 600WOG).
Material: C37700, MS58(CuZn40Pb2), CuZn39Pb3, CW602N.
Product surface can select plated nickel or chrome.
Brass Gas Valves,Gas Valves,Brass Straight Gas Valves,Standard Port Gas Valves,Gas Control Valves,Gas Solenoid Valves,Gas Ball Valves NINGBO YINZHOU PLUMBING HARDWARE CO.,LTD , https://www.brassvalve-china.com