Cucumber scab is a disease caused by a fungus, and pathogens spread over the soil as the disease remains in the soil, spreading by wind, rain, air flow, and agricultural operations. Seeds can carry bacteria. Cold and rainy, easy to attack. Generally in the seedling stage and the beginning of the fruiting melon easy to appear, after the melon stripe suffers, flow plastic, the diseased part becomes sore, easy to form malformed melon, the above characteristics are the essential difference between cucumber scab and calcium deficiency.
Cucumber scab is one of the devastating diseases in the cucumber production process, which can damage the leaves, stems, tendrils and melon strips. The young part suffers heavy damage. At the seedling stage, yellow-white round spots appear on the cotyledons, and then the whole leaves dry up. Adult stems are infected and diseased. Water-stained dark green spindles appear. Later, they become darker, sag and cracks. When the humidity is high, a layer of gray and black mold grows; the lesions are brown and rotten; the growing spots are infected and rotted after two or three days. The formation of bald piles; leaves infected, began to stain the green near-round spots, late lesions to expand, the formation of star-shaped rupture; veins after the victims become brown, necrotic, so that the leaves shrink; melon strips formed dark green, round to oval Shape lesions, 2-4 mm in diameter, central depression, cracked and sore, overflowing amber jelly.
To prevent and treat cucumber black spot disease, first, use resistant varieties, non-guay crop rotations, or planting seeds from disease-free plants;
Second, the seed treatment method can be used: 1 soaking in warm water at 55-60°C for 15 minutes. 250% carbendazim WP 500 times solution + cloud maggots soaked for 20 minutes, washed and germinated.
3 Use 50% carbendazim WP with 0.3% seed;
Once again, 10 days before the greenhouse and greenhouse planting, 0.13 kg of sulphur powder per 55 cubic meters of space, 0.25 kg of sawdust are mixed and placed in several places. After ignition, the greenhouse is sealed and smoked for 1 night. The cultivation and management are strengthened, and the temperature and humidity are controlled scientifically. Plastic film cover, drip irrigation and other technologies.
Finally, chemical control: In the early onset, 10% difenoconazole can be used to disperse granules 2000 times, 60% Baitai dispersible granules 1500 times, 40% Fuxing 8000 times, and 43% Holocyan suspension 3000 ounces. Double liquid, 30% Teflon wettable powder 1500 times, 52.5% fast-acting net dispersible granules 2000 times, 50% Tribectus dry suspension 3000 times, 50% carbendazim wettable powder 600 times , 25% Kairun EC 3000 times, 80% Yunsheng WP 600 times, 70% Mancozeb WP 500 times evenly spray, pay special attention to spray young, spray every 7-10 days 1 time, alternating use of pesticides, continuous control 2-3 times.
Disclaimer: Some articles in this website have been transferred from the Internet. If there is a third party's legal rights, please inform this website. phone
Hotel Safes,Electronic Lock Safes,Fireproof Box Smart Safe,Hot Sale Home Safes
Hebei Tiger Brand Group Jia Bao Cabinet Industry Co. LTD , https://www.cntigersafe.com