When the greenhouse temperature difference is large and the humidity is high, it is easy to cause various cucumber diseases. Now taking winter as an example, the types of cucumber diseases and the selection of pesticides are collected and rationally applied according to actual conditions.
After the infection of the new coronavirus, the human nose, throat, hypopharynx, etc. will be "concurrently carried out". By collecting samples such as sputum of the nose, throat, and throat for human virus detection and testing, it can be determined whether the new coronavirus is worn.
self corona test kit,corona kit test,corona self test kit,corona test home kit Yong Yue Medical Technology(Kunshan) Co.,Ltd , https://www.yongyuepcr.com
The main diseases in greenhouses include blight, downy mildew , powdery mildew, bacterial angular leaf spot, epidemic disease , root knot nematode disease, etc. The main pests are aphids, whitefly, red spider, and Liriomyza sativae. It should be based on the use of disease-resistant varieties and the cultivation of disease-free and strong seedlings, combined with biological control and rational use of high-efficiency, low-toxicity and low-residue pesticides, comprehensive control and prevention technology, scientific regulation of temperature, humidity, moisture, nutrition:
1. Rotation and soil disinfection and non-cucurbitaceae vegetables are carried out for 2-3 years. It can also be turned over 25 cm in high temperature in summer, and then covered with plastic film for 10-15 days. After high temperature sterilization or after removing the film in June, a green mung bean is pressed to improve the soil environment, with 50%. The carbendazim is made into toxic soil at 1:100, and 1.25 kg per square meter is sprinkled on the ground and the soil is mixed well to sterilize the soil.
2. The varieties suitable for disease resistance, disease resistance and stress resistance are selected from Jinchun No. 3, Jinyou No. 3, Tianzheng No. 2, and Lu Cucu 10.
3. Cultivate disease-free and strong seedlings (1) Disinfect 50% carbendazim WP 500 times solution, soak seeds for 1 hour, dry and sown, and use 0.3% of the seed weight of the disease for 25% sulphur cream or 50 % carbendazim powder dressing, bacterial disease can be immersed in warm water for 55 minutes at 55 °C for 15 minutes. (2) 50% carbendazim or 50% thiram double WP can be used for disinfection of seedbed soil, 5-10 grams per square meter ( 3) Strengthen the management of seedbed in the greenhouse, cover the insect net or shade net seedling, the seeding density should not be too large, and properly ventilate, control the seedlings long, spray 1-2 times before planting 50% carbendazim 500 times liquid disease (4) Grafting seedlings are used to make dead wood with black squash, and the cultivars with diseases such as downy mildew and powdery mildew are used for grafting, which can effectively control diseases and promote early maturity and high yield.
4, comprehensive measures to prevent pests and diseases (1) set up yellow plate in the protected area to trap whitefly, aphids, Liriomyza sativae, etc., can also release the control of white bee larvae (2) can choose 1% agricultural anti-wuyincin 150- 200 times liquid to control gray mold, powdery mildew, and treat black spot disease, 72% agricultural streptomycin sulfate 4000-5000 times liquid to control leaf mites, and treat the genus Liriomyza sativae (3) rational use of chemical agents to control key diseases. Fusarium wilt can be treated with 50% carbendazim WP 500 times solution or 50% methyl thiophanate WP 800 times solution; 5% frost powder or 5% creamer powder can be used for controlling downy mildew 1 kg per acre, treat both epidemic diseases and anthracnose; control aphids, Liriomyza sativae can use 10% Dagong WP 1000 times solution.