Chlorimuron ethyl injury causes

Chlorimuron ethyl is widely used for the current corn postemergence foliar treatment agent, the agent and the prevention and treatment of a broad spectrum effect is good, but the market reaction to the drug serious injury, this paper, the pharmaceutical injury symptoms, causes, preventive measures and phytotoxicity after remedial measures to do a brief overview of the application for the pharmaceutical technical guidance.

Chlorimuron ethyl(CAS NO: 90982-32-4) is currently the most widely used postemergence foliar treatment agent, suspending agent was 4% in corn 3-5 leaf stage, after a homogeneous basic weed foliage spray, 0.9-1.5 liters per hectare (equivalent to 36-60 g active ingredient / ha), can control crabgrass, goosegrass, foxtail, wild millet, redroot amaranth, quinoa, sedge weeds.

The agent is the uptake and sulfonylurea herbicides can be absorbed through the plant stems and roots and quickly xylem and phloem conduction, by inhibiting acetolactate synthase activity, impeding the synthesis of branched-chain amino acids, which affects plant cells division, so that weeds stop growing and eventually die.

After absorption of pharmaceutical weeds stop growing very quickly, usually in 4-5 days after spraying toxic symptoms appear, damage symptoms of heart leaf yellowing, chlorosis, leaf tip, leaf sheath purple. About 20 days of annual weeds killed more than 6 leaves perennial broadleaf weeds suppressed, stop growing, high doses can be fatal.

In recent years, some areas administered Chlorimuron ethyl, some maize varieties grown conventionally produced a more serious injury. Now on injury symptoms, a brief analysis causes.

Phytotoxicity symptoms

After spraying Chlorimuron ethyl 5-10d corn leaf chlorosis, yellow, or irregular chlorotic leaf spot in corn 3-5 leaf stage. Some leaves curling into a tubular shape, margin shrinkage, heart-shaped leaves oxtail, not normally draw. Corn growth was inhibited, plant height, and may have some profusion of secondary stems. Return to normal growth of the light injury, severe affecting production.

Cause injury

1. Excessive medication: fails to herbicide use as specified in doses of medication, mistaking increase the amount of the herbicidal effect can be increased, resulting in excessive drug use, high concentrations cause injury.

2. Improper medication: during the crop growth period with herbicide sensitivity varies. Chlorimuron ethyl general rhythm of corn postemergence use the 3-5 leaf stage, 2-leaf stage or less than 6 leaves, easy to produce injury.

3. Herbicide spraying inappropriate: the part of farmers lack of awareness on Herbicide, not in strict accordance with the instructions, five -leaf stage of corn in the summer is not directed spray after spraying, and even pesticides used simultaneously, a large number of liquid Shi Xiangyu m leaf artificially causing injury. Meanwhile, organophosphorus pesticide spraying corn ethyl Takatoshi sense to smoke, so with the use of organophosphorus pesticides intervals not exceeding 7 days, will produce injury.

4. Sprayer cleaning without a net: a soybean field Herbicide spray failed to timely and thorough cleaning, and then spraying it Chlorimuron ethyl, easy to produce injury on corn.

5. Sprayer poor performance or non-standard field operations: such as multi-nozzle spray nozzle flow is inconsistent, leaking, resulting in excessive localized spray volume. Spray when fighting drugs uneven spray rate link with overlap, resulting in excessive localized spray volume, but also easy to make corn suffer.

6. Weather Factor: corn growth stage low rainfall, high temperature and drought, easily impact on maize growth, corn slow growth, reduced resistance to herbicides, decomposition function to reduce phytotoxicity, many latent injury into explicit drug harm. After spraying, cold and rainy, less light, corn also prone to injury.

7. Individual maize varieties of tobacco itself ethyl Takatoshi sense such as sweet corn and burst varieties. Different types of corn resistance to the drug is different, the patience of the order of durum> General Type> Cape sweet> burst.

This article, we briefly discussed on injury symptoms and a brief analysis causes after using Chlorimuron ethyl. The next time I will given the appropriate response measures according the reasons.

Want to learn more information about Chlorimuron ethyl, you can access the guidechem.com. Guidechem.com is just a place for you to look for some chemicals. Guidechem provide the most convenient conditions for the international buyers and let these leads benefit all the business people. Guidechem chemical B2B network provides information on china and global chemical market quotation and relative chemical Information. Guidechem Chemical Network providing the most complete information of the chemical industry.