What are the methods for preventing and controlling pests and diseases in gromwell (Lithospermum)?
Gromwell is a perennial herbaceous plant whose roots can be used as medicine after drying. It has the effects of cooling the blood, invigorating blood circulation, detoxifying, and promoting eruption of rashes. It is highly effective for conditions such as intense blood heat and toxicity, measles, and incomplete eruption of macules and papules. It can prevent measles and reduce measles symptoms. Nowadays, its cultivated area is relatively extensive, but it suffers from pests and diseases during cultivation. Below, follow the editor to take a look at the prevention and control methods for gromwell pests and diseases.
1. Root rot
Root rot mainly harms the root system of the plant and generally occurs in high-temperature seasons. Because low-lying plots are prone to waterlogging and do not drain well, they are highly susceptible to fungal parasitism, thereby infecting the plant. When the disease occurs, the lateral roots or root tips begin to turn black, gradually spreading to the entire root system, and finally causing the whole root to rot and the aboveground parts to wither and die.
Prevention and control methods: When planting, choose plots with high, dry terrain and good drainage. During the rainy season, take good drainage measures. Once diseased plants are found, remove them promptly, take them out of the field and burn them, and pour lime powder or low-concentration ferrous sulfate water into the diseased holes to prevent further spread of the disease.
2. Leaf spot
Leaf spot mainly harms the leaves. When the disease occurs, irregular lesions appear on the leaves and gradually expand. In severe cases, the lesions occupy the entire leaf and also spread to the leaf stems, eventually causing the leaves of the whole plant to dry up and die.
Prevention and control methods: Strengthen fertilizer and water management to increase the plant's disease resistance. When the disease occurs, promptly remove diseased leaves or diseased plants, and spray Bordeaux mixture for control once every 7-10 days, for 2-3 consecutive times, with good results.
3. Pests
The main pests of gromwell include white grubs, mole crickets, cutworms, and weevils. They mainly harm the plant's root system and seedlings, gnawing the plant's root system or stems and leaves clean, and in severe cases causing total crop failure, with great harm.
Prevention and control methods: Before planting, plow deeply while preparing the land, and use strong sunlight exposure to kill insect eggs in the soil, or use chemicals to disinfect and sterilize. When pests break out, manual capture or poisoned bait trapping can be used to control the pests.
The above is an introduction to the prevention and control methods for gromwell pests and diseases. We hope it can help you. To learn more related knowledge, please stay tuned to us.