What are the common pests and diseases in Rehmannia (Chinese foxglove) cultivation?
What pests and diseases affect Rehmannia? How do you prevent and control them? We ask friends to help explain: Rehmannia pests and diseases include soybean cyst nematode, red spider mite, Melitaea butterflies, aphids, cutworms, mole crickets and wireworms. For detailed control methods, refer to the following list: 1. Control of soybean cyst nematode: 1. Agricultural measures...
What pests and diseases affect Rehmannia? How do you prevent and control them? We ask friends to help explainRehmannia pests and diseases include soybean cyst nematode, red spider mite, Melitaea butterflies, aphids, cutworms, mole crickets and wireworms. For detailed control methods, refer to the following list:
1. Control of soybean cyst nematode:1. Agricultural measures: crop rotation, rotating with cereal crops for 1-2 years; increase phosphate fertilizer application and irrigate at the right time. 2. Chemical control: use 3% carbofuran granules, 2-4 kg per mu, applied in the sowing furrow, then cover with soil; or use 3% isofenphos-methyl granules, 5-6 kg per mu, applied in the furrow, then cover with soil.
2. Control methods for red spider mite:Occurs from June to July. Use 8% chlorpyrifos 1000-2000 times dilution, or 20% pyridaben and other highly effective, low-toxicity insecticides and acaricides, spraying twice in succession.
3. Control of Melitaea butterflies:1. Clean the field; 2. During the young larval stage, spray with 90% trichlorfon 800 times dilution.
4. Control of aphids:Use 80% dichlorvos 1500-2000 times dilution to spray and kill aphids and the like.
5. Control of underground pests: cutworms, mole crickets and wireworms:Use 80% trichlorfon wettable powder 100 g plus a small amount of water, mix with 5 kg of roasted wheat bran or soybean cake, and scatter it in the evening as a poison bait.
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