The main diseases that endanger winter vegetables are anthracnose, viral diseases, etc., and pests include tigers and mites. Low-lying planting should be avoided, and field hygiene should be done well. The following is a comprehensive pest control technology, the Chinese pesticide network Xiaobian for you to explain: Media Facade Lighting,Led Grid Screen Lighting,Flexible Transparent Mesh Lighting,Building Lighting Shen zhen SH LED Technology Co.,Ltd , http://www.pixellightsolution.com
1. Anthracnose is mainly harmful to leaves. The leaf spot is nearly round at the beginning, and then expands into a polygonal shape to an irregular shape. The diameter is 2~6 mm, brown, and the edge color is deep. The lesion is easy to be broken in the later stage. It’s a little black spot.
At the beginning of the prevention and treatment method, 50% thiophanate-methyl WP 1000 times solution, 75% chlorothalonil WP 100 times solution and 70% thiophanate-methyl WP 1000 times solution, 40% more Sulfur suspension agent 400~500 times liquid, 80% anthrax Fumi WP 800 times solution, 2% pyrimidine nucleoside antibiotic water agent or Wuyincin 200 times liquid spray control. Once every 7 to 10 days, continuous prevention and control 2 to 3 times.
2. Root rot mainly damages the roots and stem base of the plant, causing root rot or stem rot, resulting in wilting of the whole plant. The roots of the victim are irregularly shaped dark brown lesions, and the lesions merge to form root black rot. The appearance of the base of the stem was also dark brown, and the internal vascular bundle was browned and necrotic. When wet, the surface of the affected part presents a layer of sticky mold.
At the beginning of the prevention and treatment method, potassium permanganate 600~1000 times solution, 50% fungicide carbendazim WP 500 times solution, 40% polysulfur suspension 400 times solution, 10% double effect spirit agent 300 times Liquid, 40% triazolone carbendazim WP 1000 times solution, 60% carbendazim Fumei double wettable powder 600~800 times liquid spray control, 7~10 days 1 time, continuous spray 2~3 Times.
3. The virus diseased plants are dwarfed, the leaves become smaller, and the leaves of the plants, especially the middle and upper leaves of the plants, show slight mosaics. It is characterized by deep green along the main vein and branch veins, and the veins of the veins are light green, with small dark green and light green mottled inlaid. There are also manifestations of yellowing of the leaves. There are small brown necrotic spots on the surface, and the leaves are yellow and dry when heavy.
Prevention and control methods timely control of aphids. Timely spraying of growth regulators such as compound micro-fertilizer and sodium nitrophenolate to adjust plant function and enhance disease resistance. In the early stage of the disease, the pesticide network is recommended to spray 1.5% of the phytoleptic emulsion 1000 times or 0.5% of the mushroom proteoglycan water 300 times.
4. Black spot disease is mainly harmful to the leaves. At the beginning, the leaves are light brown and nearly round to irregular shaped lesions. When the humidity is high, black molds grow on the lesions.
Before the onset of prevention and treatment, 50% Pythium WP 1500 times solution, 50% Isocarburon WP 1000 times solution, 75% chlorothalonil WP 600 times solution, 70% mancozeb can be used. Wet powder powder 500 times liquid spray control, 7 to 10 days, continuous prevention and treatment 3 to 4 times.
5. Sclerotinia sclerotiorum is susceptible to disease, mainly to damage the stem. In the early stage of the disease, the stem spot was initially water-stained, and then turned brown-brown. The diseased minister produced white hyphae and flat round sclerotium. The affected stem was covered with white hyphae, causing soft cortex and stalk fragmentation. The stem is hollow, and sometimes the sclerotium is visible. After the stem is damaged, the branches and leaves are wilting and gradually die.
The control method can be controlled by spraying 40% sclerotium net wettable powder 500 times, 50% benomyl WP 1500 times, etc., 7~10 days, continuous prevention 2~3 times.
6. The ground tiger can use the bait to trap and control.
7. Aphids can be controlled by imidacloprid or the like.
8. Spodoptera litura can be controlled by pyrethroids or avermectin pesticides .