Defoliation composition, cotton defoliant and preparation method of cotton defoliant

Abstract

The invention discloses a defoliation composition, a cotton defoliant and a preparation method of the cotton defoliant, and belongs to the technical field of cotton defoliation. The defoliation composition comprises, by weight, 5-15 parts of thidiazuron, 15-100 parts of ethephon and 1-5 parts of cyclopropanecarboxamide. The cotton defoliant comprises a dispersant and the defoliation composition, and the dispersant comprises a sodium hydroxide solution. The cotton defoliant can effectively reduce the use temperature of the defoliant, so the cotton defoliant still can keep a good activity and a good defoliation effect at a temperature less than the mean daily temperature of 20 DEG C. The defoliant with a low use temperature can prolong the functional period of cotton leaves and the development period of cotton bolls, promote the effective development of the cotton bolls and improve the problem that forced untimely spraying of the defoliant in fiber production in mechanical plucking on the yield and the quality of fibers. The preparation method of the cotton defoliant comprises the following steps: separately preparing a first solution and a second solution, and then mixing the first solution with the second solution. The preparation method is simple.

Description

technical field [0001] The application relates to the technical field of cotton defoliation, and in particular to a composition for defoliation, a cotton defoliation agent and a preparation method thereof. Background technique [0002] Cotton is one of the most important economic crops in my country. In recent years, with the changes in the structure of cotton planting labor and the sharp increase in labor costs in major cotton areas, the degree of mechanization of cotton fields has gradually increased, and the area of ​​machine-picked cotton has rapidly expanded. Machine-picked cotton has become an inevitable choice for the healthy development of my country's cotton industry. [0003] Chemical defoliation is the core technology for mechanical harvesting of cotton. It mainly uses plant growth regulators to intervene in the physiological and biochemical processes of cotton, accelerate plant aging, and achieve defoliation. The effect of chemical defoliation becomes the key to...

AI Technical Summary

Problems solved by technology

Unsatisfactory defoliation effect and high impurity content often lead to lower harvesting efficiency of machine-picked cotton, higher cleaning costs and lower fiber quality

[0004] At present, affected by the environment and planting system in the cotton area, the machine-picked cotton planted is mainly early-maturing or partial-early-maturing varieties with concentrated bolls and flocs. Spraying defoliants too early shortens the photosynthetic function period of cotton leaves, significantly Affect the development of cotton bolls, reduce fiber quality and yield; and spraying defoliants too late will result in poor defoliation effect due to lower ambient temperature, affecting the final machine-harvesting effect.

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