Food-intake preventer and preparing method thereof for striped flea beetle
A flea beetle and inhibitor technology, applied in the field of botanical plant protection agents, to achieve the effect of reducing the degree of damage
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Embodiment 1
[0022] Dry the lantana leaves at 50-70°C to constant weight, crush them into dry powder, soak the dry lantana powder with methanol at room temperature according to the conventional method and dosage, and filter to obtain the methanol extract; decompose the methanol extract with activated carbon Depigmentation to golden yellow, filtering, removing methanol to prepare a methanol extract of lantana; soaking the methanol extract of lantana with chloroform, filtering, removing chloroform to prepare a chloroform extract of lantana; using an appropriate amount of methanol in a water bath Completely dissolve the chloroform extract at 60-70°C, and let it stand below 0°C for 24 hours. After the crystals are precipitated, filter the crystals and dry them naturally to obtain the yellow powdered total lithenene. The methods used are all conventional methods in the art.
Embodiment 2
[0024] Take 0.2g of lantana methanol extract, dissolve it with 2ml of methanol in a water bath at 60-70°C to obtain a lantana extract solution; add 100ml of water and 0.5ml of Tween 80 to the lantana extract solution, mix Evenly, preparation 1 was obtained.
Embodiment 3
[0026] Take 0.2g of methanol extract of lantana, dissolve it with 1ml of methanol in a water bath at 60-70°C to obtain a solution of lantana extract; add 400ml of water and 1ml of Tween 80 to the solution of lantana extract, mix well , to obtain preparation 2.
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