The disease mainly occurs in the rainy period in summer. The symptoms are as follows: the roots and rhizomes of the plants decay first, then gradually spread to the upper part of the ground, making the cortex brown, and finally leading to the withering and death of the plants.
Prevention and control method: burn the diseased plant intensively, sprinkle lime on the diseased acupoint for disinfection, or apply 500 times solution of 50% carbendazim to irrigate the diseased acupoint..
The disease usually occurs in the period from mid June to early July, which is characterized by the drooping of the first leaves and leaf tips, the withering of the leaves, the rotting of the roots and the withering of the whole plant.
Control methods: clear and burn the residual plants to eliminate the overwintering pathogens; drain the ditches in time after rain; spray potassium dihydrogen phosphate on the leaves in combination with spraying chemicals to improve the disease resistance of the plants; spray 500 times of 50% carbendazim, 800 times of 50% methyltobuzin, or 500 times of 40% carbendazim gum suspension to irrigate the holes and the roots of the neighboring plants in the early stage of the disease. Prevent spread
The disease is a fungal disease, mainly harmful to the leaves of Agastache rugosa, generally occurred in May June, especially in the rainy season. The symptoms are that there are nearly round spots on the leaves, light brown in the middle, dark brown on the edge, and light black molds.
Control method: remove and burn the diseased leaves intensively. You can use Bordeaux solution or spray 500 times of 64% alum wettable powder for corresponding control.
The symptoms are that there are polygonal lesions on both sides of the leaves, the initial diameter is about 1-3 mm, and the leaves turn yellow. In serious cases, the lesions converge, causing the leaves to die.
Prevention and treatment: at the beginning of the disease, spray 50% Ralstonia virus 1000 times every other week, spray 2-3 times continuously.
