Use its roots and stems. The active ingredient is a rhizome-containing compound, including free and bound chrysophanol, rhein, aloe-emodin, emodin, emodin methyl ether, senna A, B, C, D, and valerin, rhubarb Acid, glucose gallic acid, unsaturated fatty acids, and the like. Use rhubarb 5 kg plus water 20 kg, boil for 2 hours, filter the residue to spray, can control cabbage worms, mites and vegetable seedling pests.
Second, gourd: the whole plant contains alkaloids, the content of roots is higher than other parts. The active ingredients are cucurbitacin A, B, garlic cucurbit 1 kg plus water 20 kg soak for 1 day, spray 150 kg per acre, can control aphids, cabbage caterpillars, soft insects, mosquitoes and so on.
Third, Sophora flavescens: mainly root, fresh stems and leaves can also be used. The active ingredients are matrine, hydroxy matrine, matrine, oxymatrine, berberine, methyl guanidine, phytoline, and hawkberry. Boiled with 1 kg of Sophora flavescens and 10 kg of water for 30 minutes, filter the slag, spray 100-150 kg per mu, and control aphids, cabbage caterpillars, mulberry, wild silkworms and various caterpillars.
Fourth, astragalus: mainly with roots, but also fresh stems and leaves. The active ingredients include scutellaria, scutellaria, scutellaria, baicalein and essential oils. The larvae were treated with 5 times water soaking solution of Astragalus membranaceus L., and the insecticidal rate was 90%. The inhibitory effect of 15 times aqueous extract on the spore germination of sweet potato black spot disease was 95.6%, and that of potato late blight was 97.3%.
5. Chili: It mainly uses its fruit. The active ingredients are capsaicin, dihydrocapsaicin, nordihydrocapsaicin, high capsaicin, high dihydrocapsaicin, in addition to capsanthin, capsanthin and carotene, vitamin C, fatty oil, resin, etc. . Use 1 kg of pepper and 10 kg of water to boil for 30 minutes. After spraying, spray directly or grind it into fine powder to control aphids, cabbage caterpillars, leafhoppers, mites, mulberries, and various caterpillars.
Second, gourd: the whole plant contains alkaloids, the content of roots is higher than other parts. The active ingredients are cucurbitacin A, B, garlic cucurbit 1 kg plus water 20 kg soak for 1 day, spray 150 kg per acre, can control aphids, cabbage caterpillars, soft insects, mosquitoes and so on.
Third, Sophora flavescens: mainly root, fresh stems and leaves can also be used. The active ingredients are matrine, hydroxy matrine, matrine, oxymatrine, berberine, methyl guanidine, phytoline, and hawkberry. Boiled with 1 kg of Sophora flavescens and 10 kg of water for 30 minutes, filter the slag, spray 100-150 kg per mu, and control aphids, cabbage caterpillars, mulberry, wild silkworms and various caterpillars.
Fourth, astragalus: mainly with roots, but also fresh stems and leaves. The active ingredients include scutellaria, scutellaria, scutellaria, baicalein and essential oils. The larvae were treated with 5 times water soaking solution of Astragalus membranaceus L., and the insecticidal rate was 90%. The inhibitory effect of 15 times aqueous extract on the spore germination of sweet potato black spot disease was 95.6%, and that of potato late blight was 97.3%.
5. Chili: It mainly uses its fruit. The active ingredients are capsaicin, dihydrocapsaicin, nordihydrocapsaicin, high capsaicin, high dihydrocapsaicin, in addition to capsanthin, capsanthin and carotene, vitamin C, fatty oil, resin, etc. . Use 1 kg of pepper and 10 kg of water to boil for 30 minutes. After spraying, spray directly or grind it into fine powder to control aphids, cabbage caterpillars, leafhoppers, mites, mulberries, and various caterpillars.
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