Composition for pest control and its preparation method and application
A pest control and composition technology, applied in the field of pesticides, can solve the problems of inability to quickly kill insects, poor insecticidal effect, and resistance, and achieve the effect of solving flammability problems, suitable for popularization and application, and preventing coma
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Embodiment 1
[0021] This example provides a preparation method of the composition of the present invention, specifically:
[0022] The ethyl formate liquid is gasified by a gasification device to obtain the desired product ethyl formate gas. In a closed pressure-resistant fumigant mixer, ethyl formate gas and carbon dioxide and / or nitrogen are mixed in a volume ratio to obtain a mixed gas fumigant of ethyl formate and inert gas.
[0023] Among them, the purity of ethyl formate gas, carbon dioxide, and nitrogen are all 99% by mass fraction.
Embodiment 2
[0025] The mixed gas fumigant prepared by the method in Example 1 in the fumigant mixer, the components in the fumigant are shown in Table 1:
[0026] Table 1 Fumigant distribution ratio table
[0027]
Embodiment 3
[0029] The composition of the invention is used to kill pine wood nematodes.
[0030] Pine wood nematode is a pathogen that causes pine blight, which is a devastating disease of pine trees. The pine wood nematode spreads to all parts of the world with the dispatch of the diseased wood and the transportation of the cargo wood packaging products, becoming a worldwide quarantine pest.
[0031] At a fumigation temperature of 10-30°C and a relative humidity of about 70%, the wood sections with pine wood nematodes are sawn into 10cm pieces, and they are placed in 7 1.5L jars, each jar separately The fumigant prepared in Example 2 according to the proportions of serial numbers 1-7 in Table 1 was used for fumigation, the usage amount of the fumigant was 50 mg / L, and the fumigation time was 12 hours.
[0032] The results showed that the killing effect of the 7 groups of fumigants on pine wood nematode was above 90%.
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Abstract
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