The stalk-based rot disease of hydroponic amaranth is the main disease of leeks. The comprehensive control pesticides can be used to prevent and control the two-pronged control. The China Pesticide Network Xiaobian will help you to control diseases and reduce losses.
[Symptoms]: Mainly damage the base of the stem. The appearance of the diseased plant is dehydrated and wilting. When the base of the stem is examined, it can be browned and necrotic, the root cortex rots and falls off, and no new root grows.
[Pathogen and disease characteristics]: The pathogen is not yet clear. The stalk-based rot disease of the ground stalk is caused by the infection of Myrothecimroridum TodexFr. The pathogens lived in the soil with the mycelium and the spores and survived over the winter. The conidia were used as the invading and re-invasion inoculation, and the disease was transmitted from the base of the stem by means of wind and rain. However, whether the stalk-based rot disease of hydroponic amaranth is the same as the pathogen and pathogenic characteristics of stalk-based rot disease, it needs further study.
[Control methods]:
The pesticide network reminds everyone that the following aspects should be taken into consideration in the prevention and control of stem rot disease in the field of leeks:
(1) Implement a rotation.
(2) After harvesting, it is necessary to carefully clear the garden, collect the sick and burned, and then plow the soil.
(3) Soil disinfection (poisoning or spraying liquid) when soil preparation before sowing.
(4) Strengthen the inspection and find that the diseased plant is immediately removed, and then the sprayed liquid is used to block the disease center (the diseased point and the nearby plants of 1 or 2 rows). The medicament can be used with 40% triadimefon carbendazim WP 1000 times. Or 69% Anke MnZn + 75% chlorothalonil (1:1) 1000 ~ 1500 times solution, or 25% spray Shibao suspension 1000 times solution, or 50% Shi Baogong emulsifiable oil 2000 times solution, 2 to 3 times, 1 time every 7 to 10 days, before and after the dense, drenched. However, there is no mature experience in the prevention and treatment of stalk-based rot disease in hydroponic amaranth. China's pesticide network recommends adopting a nutrient hydroponic liquid disinfection method or reducing the water level of the hydroponic liquid (corresponding to the drainage exposed field) for a period of time (a few hours or half a day), and then spraying to protect the base of the stem of the plant, and then recovering for 2 to 3 hours. The aqueous layer of the culture medium.
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