Compound insecticide from plant source and its preparing method
A botanical insecticide and insecticide technology, which can be applied in the fields of botanical equipment and methods, plant growth regulators, biocides, etc. get, fast effect
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Embodiment 1
[0020] Weigh 100 kg each of crushed Ailanthus japonica leaves, Ailanthus ailanthii, and Brucea javanica fruit, and extract them with ethyl acetate at a temperature of 45°C, and concentrate the extracts to 30 kg, respectively, to obtain S. Extract: Weigh 100 kg of pulverized roots of Pulsatillae Radix, extract with alcohol at a temperature of 45° C., and concentrate the extract to 30 kg to obtain a crude extract of Pulsatillae Radix.
Embodiment 2
[0022] With reference to Example 1, various plant crude extracts were obtained. Place 3 kilograms of Brucea javanica fruit crude extract, 3 kilograms of Ailanthus root crude extract, 15 kilograms of Junzi crude extract and 4 kilograms of surfactants (such as polysorbate-80) in the homogenizer, heated to 46 ℃, after fully mixing, slowly add 15 kg of Pulsatilla vulgaris crude extract, 10 kg of water, stir for 30 minutes, cool to normal temperature, form a water emulsion, and obtain a compound botanical insecticide.
[0023] Indoor toxicity test of the compound botanical insecticide prepared by embodiment 2:
[0024] Indoor test pests include cabbage caterpillar (Pieris rapae L.) 3-4 instar larvae, armyworm (Mythimna separata Walker) 3rd instar larvae, litura litura F. 3rd instar larvae, silver print (Plusia agnata Sttaudinge) 3rd instar larvae, cabbage aphid (Brevicorune brassicae L.), green peach aphid (myzus persica Sulzer), cotton aphid (Aphis gossypiiGlover), bean aphid (Ap...
Embodiment 3
[0032]Each plant extract was obtained with reference to Example 1. Put 10 kilograms of Brucea javanica crude extract, 10 kilograms of Ailanthus crude extract, 10 kilograms of Junzi crude extract and 4 kilograms of surfactant (polyoxyethylene nonionic surfactant: OP-10) into homogenizer , heated to 46°C, mixed thoroughly, then slowly added 10 kg of Pulsatilla pulsatillae crude extract, 6 kg of water, stirred for 30 minutes, cooled to room temperature, formed a water emulsion, and obtained a compound botanical insecticide.
[0033] Table 2 shows the results of the indoor toxicity test of the compound botanical insecticide prepared in Example 3 (the pests tested and the test method are the same as the previous example). As can be seen from the results in the table, the compound botanical insecticide produced by this technology has a very high toxicity to the tested pests. Especially for cabbage caterpillar, armyworm and various aphids, the 48-hour corrected death rate of the tes...
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