Eggplant should strengthen the prevention and treatment of verticillium wilt, cotton rot, brown streaked disease and so on. Cucumber strengthens the control of downy mildew. Chinese cabbage and other cruciferous vegetables prevent soft rot, downy mildew, Spodoptera litura, Pieris rapae and other diseases. Let me talk about several common pests and diseases. Tobacco worm: Mainly damage green peppers. The larvae eat buds, flowers and fruits. They also damage tender stems, leaves and buds, causing a lot of fruit drop. When catching the hatching period to the second instar period (within 1 cm of the larva), apply the medicine when the larva has not penetrated into the fruit. Control method: You can choose to kill 6000 times liquid, 2.5% Kungfu EC 5000 times, 2.5% Uranus EC 3000 times for control. If the larvae have penetrated into the fruit after the third instar, the effect of pesticide application is very poor. Bean rust: Bean rust is an airborne disease that spreads quickly and has serious damage. If the conditions are right, it will soon develop throughout the field. The typical symptoms are yellowish-brown or dark-brown blister spots on the leaves. Control method: You can use 15% triadimefon wettable powder 1000 to 1200 times liquid, or 50% Weishiling EC 800 to 1000 times liquid, or 25% Dili demulsified oil 3000 times liquid and other sprays. Early blight: Early blight is an important disease of tomatoes, peppers, eggplants, etc. The leaves suffer the most. Typical symptoms are round or nearly round leaf spots with brown edges and light gray centers. The spots have concentric ring patterns. When humidity is high, they appear black. Mildew. Prevention method: spray with 70% mancozeb wettable powder 600 times solution, or 75% chlorothalonil wettable powder 600 times solution, or 50% prodynein wettable powder 1000 times solution. Yellow song strip jump armor: Crops are mainly cruciferous vegetables such as cabbage, cabbage, and radishes, but also vegetables such as fruits, melons and beans. Adults gnaw on the leaves, creating fine pores. The larvae feed exclusively on the underground parts, and the wormed vegetable roots become curved insect channels. Control method: 20% good winter 1000~1500 times liquid, or 1.8% Avodine 2000 times liquid, 80% or 90% solid trichlorfon 1000~1200 times liquid can be sprayed. Tangerine August is the critical period of citrus fruit expansion and autumn shoots. The main agricultural operations are carried out around the shoots and fruits. The new shoots of citrus in August are very attractive to pests. At the same time, the diseases in this period should not be underestimated. It is necessary to pay attention to timely control and protect the autumn shoots. Leafminer: Spray the first spray when most of the buds are 0.5 cm long, and spray the second spray every 7 to 10 days. Medicaments can be selected: carbofuran, diflubenzuron, imidacloprid, dinotefuran, cyfluthrin, etc. Psyllids: The entire autumn shoot period should be focused on prevention and control, especially for young trees, spray the spray before putting the shoots, and then spray once every 10 to 15 days, at least 2 times in each batch of shoots. Choice of agents: Thiamethoxam, Carbofuran, Chlorpyrifos, Bifenthrin, Phoxim, etc. Rust tick: Pay attention to field observation and inspection. If dusty insects are found on the surface of individual fruits, chemical control should be carried out immediately. The medicament can be selected: abamectin, triazolate, carbofuran, pyridaben, lufenuron, tolfenpyrad, etc. Ulcer disease: Citrus canker is a bacterial disease that is spread mainly by wind and rain. Therefore, canker can occur after wind and rain in summer and autumn, especially citrus that is damaged by leaf miners. The choice of medicament is to use copper preparations in combination with systemic drugs. At the same time, pay attention to the prevention and control of aphids, anthracnose, brown spots, etc., and beware of pests and diseases in hot weather! Disclaimer: Some articles on this website are transferred from the Internet. If the legal rights of a third party are involved, please inform this website for processing. phone Hydrogen Water Machine,Hydrogen Water Generator,Best Hydrogen Water Machine,Molecular Hydrogen Water Machine,Hydrogen Water Maker Shenzhen Yibainian Investment Industrial Co., Ltd. , https://www.100hydrogen.com
Severe pests and diseases in August are the key to the success or failure of vegetable cultivation. Special attention should be paid to strengthening the prevention and control of various vegetable virus diseases and aphids.