Purple Sweet Potato Disease and Pest Control Techniques and Measures
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Purple Sweet Potato Disease and Pest Control Techniques and Measures
Purple sweet potato black spot disease can be sprayed with a green bag fertilizer fungicide on the roots, clear the field disease sources, select resistant varieties, rotate crops, cultivate disease-free seed tubers and seedlings, avoid applying diseased manure, and strictly implement a quarantine system. If pests like the sweet potato moth appear, deep irrigation can be carried out in the village to eliminate overwintering moth pupae. In addition, insect traps can be used to kill or utilize natural enemies for control, or pesticides can be sprayed.
Common Diseases in Purple Sweet Potato Cultivation
1. Purple sweet potato black spot disease: Also known as black scar disease, it mainly affects seedlings and tubers, causing disease spots on the base of young stems, especially on the white parts, which are black-brown and slightly sunken.
2. Purple sweet potato stem nematode disease: Also known as chaff heart, daisy heart, chaff bough, or hollow heart, the surface may be normal or slightly black, with internal brown and white alternating in a chaff heart pattern.
3. Purple sweet potato root rot disease: Also known as烂根病 (rotten root disease), the root tip turns black and gradually spreads upward, the seedlings become dwarfed, the leaves turn yellow, and they fall off from the bottom up, with severe cases resulting in dry and withered death.
Main Pests in Purple Sweet Potato Cultivation
Purple sweet potato moth: It is concentrated in the unexpanded young leaves of purple sweet potatoes, where it spins silk and turns them into small leaf buds,危害 the growth of leaves, and in severe cases, can cause young leaves to wither.
Purple Sweet Potato Disease and Pest Control
1. Purple sweet potato black spot disease: Green bag fertilizer fungicide can be sprayed on the roots, and it is necessary to avoid rainy and cloudy weather, as rainy days can cause secondary dilution of the product, making it difficult to achieve the expected results.
2. Purple sweet potato stem nematode disease: Clear the field disease sources, select resistant varieties, rotate crops, cultivate disease-free seed tubers and seedlings, avoid applying diseased manure, and strictly implement a quarantine system.
3. Purple sweet potato root rot disease: Select resistant varieties, cultivate strong seedlings, plant early, deeply turn the soil, apply clean manure, and rotate crops.
4. Purple sweet potato moth: Deep irrigation can be carried out in the village to eliminate overwintering moth pupae. In addition, insect traps can be used to kill or utilize natural enemies for control, and pesticides can also be used for control.
The above is an introduction to the techniques and measures for controlling purple sweet potato diseases and pests, which can serve as a reference suggestion.