Targeted sustained-release nano-pesticide preparation for aphid control, preparation method and application thereof

Abstract

Belonging to the technical field of pesticide preparations, the invention provides a targeted sustained-release nano-pesticide preparation for aphid control, a preparation method and application thereof. The preparation method includes: taking tripolyglycerol monostearate, P(HB-HO), an aphid control pesticide, PVA and aphid sex pheromone as the raw materials; dissolving tripolyglycerol monostearate, P(HB-HO) and the aphid control pesticide in an organic phase in order; dissolving PVA into a PVA aqueous solution of certain concentration, mixing the PVA aqueous solution with the organic phase, and conducting high pressure homogenization to form an emulsion, performing full stirring to volatilize the organic phase, subjecting the emulsion to high speed centrifugation, discarding the supernatant, and collecting the precipitate; dissolving the aphid sex pheromone in anhydrous ethanol, performing mixing with the collected precipitate, conducting impregnation adsorption, and carrying out highspeed centrifugation to collect the precipitate, and performing freeze drying, thus obtaining the targeted sustained-release nano-pesticide preparation. The preparation obtained by the method provided by the invention has the characteristics of uniform particle size distribution, good dispersity and good sustained release performance, has active targeted luring and poisoning effects on aphids, can improve the pesticide efficacy, also can reduce the pollution of pesticides to the environment and the harm to non-target organisms, and reaches the purposes of active luring and killing of target pests.

Description

technical field [0001] The invention belongs to the technical field of pesticide preparations, and in particular relates to a targeted slow-release nano-pesticide preparation for preventing and controlling aphids, a preparation method and application thereof. Background technique [0002] Aphids, belonging to the family Aphidoidea of ​​the order Homoptera, are among the fastest reproducing and most destructive insects in the world. Aphids are very harmful, and there are about 250 species that are extremely destructive to agriculture, forestry and horticulture. In my country, there are about 1,100 species of aphids, which mainly harm food and economic crops by eating and spreading viruses, and can cause varying degrees of damage to the yield and quality of crops. For a long time, people have devoted themselves to the control of aphids by spraying pesticides and physical measures, among which the use of chemical pesticides is one of the most important means. The use of pesti...

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Problems solved by technology

There are related patents and literature reports on chemical pesticide sustained-release preparations for controlling aphids (patent: CN102823601A Pymetrozine sustained-release granule and its preparation and application, CN105519562A Preparation method of imidacloprid microcapsules; literature: Zhu Yingfei. Methyl salicylate Preparation of sustained-release balls and their ecological function evaluation [D]. Shandong Agricultural University, 2015;) However, most of the chemical pesticide sustained-release preparations prepared in current patents and papers lack clear active targeting of aphids, and have not reduced Hazard to non-target organisms

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