Control Methods for Leaf Spot Disease and Silver Y Moth on Achyranthes bidentata
How to control leaf spot disease and silver Y moth on Achyranthes bidentata? Please describe the methods. Leaf spot disease of Achyranthes bidentata: also known as bacterial black spot, mainly affecting leaves and petioles. In the early stage of leaf infection, many water-soaked dark green round to polygonal small spots appear on the leaf surface, which later gradually expand, forming brown to dark brown poly...
How to control leaf spot disease and silver Y moth on Achyranthes bidentata? Please describe the methodsLeaf spot disease of Achyranthes bidentata:Also known as bacterial black spot, mainly affecting leaves and petioles. In the early stage of leaf infection, many water-soaked dark green round to polygonal small spots appear on the leaf surface, which later gradually expand, forming brown to dark brown polygonal spots between the veins, and the petioles dry up and slightly curl.
Control methods for leaf spot disease of Achyranthes bidentata:Remove diseased leaves as much as possible to reduce the source of bacteria. When necessary, spray 30% Ludeobao suspension concentrate at 400 times dilution, or 1:240 Bordeaux mixture, 77% Keshade wettable powder at 500 times dilution, or 60% copper succinate-glutarate wettable powder at 500 times dilution, once every 10 days or so, for 2-3 treatments.
The silver Y moth is an omnivorous pest. If not controlled in time, tender buds, tender leaves and flower buds are often eaten, causing the plant's leaves to curl and wither.
Control methods for silver Y moth: Before the larvae reach the 3rd instar, spray 90% trichlorfon at 800-1000 times dilution or 50% phoxim at 1000 times dilution, once every 10-14 days, for 2-3 consecutive sprays.
Click to get more Achyranthes bidentata cultivation techniques
Click to get more medicinal herb cultivation techniques