Abstract: The emulsifiers containing higher fatty alcohols can affect the transcription levels of genes related to phenylpropanoid-related biosynthetic pathway, fatty acid metabolic pathway, and brassinolide and strigolactone biosynthetic pathways through external application, thereby improving the disease resistance of cruciferous plants, improving quality and increasing yield, and achieving high-quality and high-yield production of cruciferous plants.

Abstract: The present invention provides a use of a higher aliphatic alcohol in preparing a preparation for increasing a content of lysophosphatidylcholine in legumes, and the higher aliphatic alcohol increases a quantity of nodules by increasing the content of lysophosphatidylcholine in the legumes, thereby improving a nitrogen fixing capacity of the legumes. The present invention also provides a use of a higher aliphatic alcohol in preparing a preparation for improving a drought resistance of legumes, and the preparation containing the higher aliphatic alcohol improves the drought resistance of the legumes by increasing a transcriptional level of genes related to the phenylpropanoid metabolic pathway, increasing a transcriptional level of genes related to the isoflavone biosynthetic pathway and increasing a content of an isoflavone compound in the legumes.

Abstract: Disclosed is a use of a higher fatty alcohol in preparing a preparation for improving transcription levels of genes associated with synthesis pathways of jasmonic acid, cutin, and wax of corn plants. By using a water emulsion containing the higher fatty alcohol, the synthesis pathways of the cutin, the wax, and the jasmonic acid in metabolic pathways of the corn plants are affected, rust disease resistance, pest resistance, and drought resistance of the corn plants can be effectively improved, and a yield of the corn plants is increased.

Abstract: A water emulsion containing a higher aliphatic alcohol of the present disclosure can affect contents of signal substances lysophosphatidylcholine and lysophosphatidylethanolamine in Solanaceae plants, and transcriptional levels of genes related to phenylpropanoid metabolism pathway by an external application, thereby inhibiting senescence and increasing shelf life of the Solanaceae plants. In addition, a use of improving a resistance to pests and diseases of the Solanaceae plants can be achieved by increasing a content of lignin.

Abstract: The application of the aqueous emulsion containing higher fatty alcohol of the present disclosure on rice and wheat can significantly affect the transcription levels of genes related to the phenylpropanoid metabolic pathways in rice and wheat, thereby increasing the lignin content of rice and wheat, and increasing the lodging resistance of rice and wheat. In practical agricultural production, the application of the aqueous emulsion containing higher fatty alcohol of the present disclosure can improve the rust resistance, insect resistance, lodging resistance and storage ability of rice and wheat, thereby improving the quality and yield of rice and wheat.

Abstract: Provided is an emulsion in water for preventing and treating a yellow shoot of a citrus fruit tree, and it is composed of the following components according to the weight ratio: 100-300 parts of a dodecanol, 2-150 parts of a hexadecanol, 1-100 parts of a bactericidal insecticide, 5-150 parts of a plant nutrient, 5-10 parts of an emulsifier, 4-6 parts of a co-emulsifier, 40 parts of a thickener, and 500-800 parts of water. The emulsion in water for preventing and treating the yellow shoot of the citrus fruit tree, the preparation method and the application method provided by the present invention may achieve the following technical effects: the main propagation path of the citrus yellow shoot is cut off, the spread of the yellow shoot is prevented, pathogenic bacteria of the yellow shoot of the fruit tree are killed, and the vitality of a diseased tree is restored.