Control method of super-old barnyard grass in rice transplanting field

Abstract

The invention discloses a control method of super-old barnyard grass in a rice transplanting field. After rice is transplanted, in the stage from 7 leaf stage comprising 6-leave 1-core stage or aboveto heading stage, 12-15ml of a 19% triafamone suspending agent and 3-4g of bispyribac-sodium active ingredients are added with 60-80kg of water and are uniformly sprayed to the barnyard grass per mu.According to the invention, the barnyard grass control suitable time in the rice transplanting field is greatly shifted backward, aiming at the control of the super-old barnyard grass, after the 5-leaf stage of the rice, triafamone and bispyribac-sodium are ensured to be used in combination, two high-activity acetolactate synthase (ALS) inhibitors are used in combination, internal absorption conductivity, penetrability and lethal intensity shown by the combination use of the triafamone and the bispyribac-sodium to the super-old barnyard grass in the later stage are incomparable to that of other stem and leaf treatment agents, the weeding activity is abnormally exerted, the problem of controlling and removing of the barnyard grass in the stage from the 7 leaf stage or above to the heading stage is solved, and the control effect on resistant barnyard grass (including green-stem barnyard grass and red-stem barnyard grass) and paspalum distichum(including knotgrass and Entada phaseoloides)is excellent.

Description

technical field [0001] The invention relates to the technical field of rice field cultivation management, more specifically, it relates to a method for preventing and treating super-old barnyardgrass in a rice transplanting field. Background technique [0002] Barnyardgrass belongs to Gramineae, and barnyardgrass is an annual herb, mostly grown in rice fields, swamps and ditches. Barnyardgrass has a tall plant type, strong vitality and fecundity, and wide adaptability. It can grow vigorously no matter the soil is fertile or thin, and the climate is cold or warm. It competes with rice for fertilizer, water, and sunlight. It is the largest malignant weed in rice fields everywhere. Rice yield and quality pose a huge threat. [0003] In agricultural production (this is for the purpose of explaining the problem, it is my own classification standard) the preliminary classification of barnyardgrass leaf age: ⑴ Young barnyard grass: refers to 1 to 4 leaves (including 3 leaves and 1...

AI Technical Summary

Problems solved by technology

Missing the best period of medication will not only increase the cost of medication, but also make it difficult to control barnyardgrass when the leaves are too old, and the effect is not ideal. Without relatively mature formulas and control methods, we have to give up control

[0005] The main reasons why it is difficult to control super-old barnyard grass are: firstly, the old barnyard grass grows vigorously, has luxuriant branches and leaves, and has a very fast metabolism. A small amount of medicine has no lethal effect on the barnyard grass; The time will block the conduction of the pesticide, and the amount of pesticide that finally reaches the growth point is very small; in addition, the old barnyard grass is very large, and it is difficult to spray the pesticide through