It is also called black stem disease. At the early stage of Passiflora infection, the upper leaves of the plant will shrink and curl, and even the whole leaves will dry up and fall.
In severe cases, the roots turn brown until the whole plant dies.
Spraying 40% or 1000 times of wettable powder of 1000 sodium sulfate to spray the disease strain, spraying once every 3 to 5 days, and spraying 2 to 3 times can be effective.
It can also be sprayed with 70% tobuzine 800-1000 times.
Anthrax mainly damages leaves and fruits.
At the early stage of the disease, there were nearly round to semi-circular or irregular brown spots on the edge or tip of the leaves, and the spots gradually turned gray white. There were round wrinkles on the edge, and the boundary between disease and health was obvious.
In the later stage, there were small black spots arranged irregularly or in the form of whorls. The front side was slightly large and sparse, and the back side of the leaves was dense, which was the conidial disk of the pathogen. The fruit is infected with purple brown sunken spots.
When the humidity is high, there is pink mucus, which is the mixture of conidia and glia.
In the early stage of the disease, 25% prochloraz emulsion was sprayed 500-600 times, or 50% manganese zinc wettable powder 400-600 times. Two to three times in a row, 7 to 10 days apart.
50% carbendazim 500 times or 40% carbendazim 400 times can also be used for control.
After infected with mosaic, the young leaves of Echinacea will appear a pattern of strong green and light green, and become leaves.
The new leaves were yellow green mosaic flowers and leaves, the diseased leaves became smaller and slightly shrunk. When the diseased leaves were serious, they rolled back, and the lower leaves of diseased plants gradually withered.
Cultivate some virus-free seedlings, eliminate the infectious vectors in time, such as aphids, and remove the diseased leaves and strains.
In the early stage of the disease, spray 300 times of 5% Junduqing wettable powder, or 500 times of 3% Triazole Nucleoside (enobenda), in addition, mix with 25-30g of zinc sulfate, 20g of boron fertilizer, 5g of natural brassinolide, and spray once every 5-7 days with aphid killing agent, 2-3 times in a row.
