Chlorimuron ethyl phytotoxicity measures

In previous article, we briefly discussed on injury symptoms and a brief analysis causes after using Chlorimuron ethyl; today, we can talk about how to deal with the injury symptoms.

Here, I want to keep the point on two aspects about preventive and remedial measures.

Preventive measures

1. Accurately calculate the amount of Chlorimuron ethyl. Depending on soil and climatic conditions, grass love Chlorimuron ethyl determine the dosage, to the amount of quasi-chemical control area to area medication, accurate dilution, uniform spraying, do not re-spray, do not leak spray, can not be arbitrarily increased drug concentration and spray Shi times.

2. Strictly in accordance with suitable period of medication, scientifically formulated liquid, determine spraying period. Necessary to consider the sensitive period of weeds, for good control effect, but also to choose seasonal crops resistant to strong, safe time “Xiacha” crop spraying. 3-5 leaf stage of corn has the strongest resistance on Chlorimuron ethyl, then the safest medication.

If the weather and other reasons, the 6-leaf stage of corn after the medication, as directed spray, pharmaceutical avoid touching the heart of corn leaves. General 2-leaf stage of corn leaf stage before and 10 after are sensitive to Chlorimuron ethyl, not medication. Meanwhile, the solution should be accurate dilution, mix well before spraying.

3. To improve the level of application techniques and strict chemical control procedures. Guiding farmers to eliminate the existing old-fashioned poor performance manual sprayers, and introducing them good performance, high efficiency, low cost, new sprayers.

Currently there are better performance Shandong Wish Plant Protection Machinery Co., Ltd. produces WS-16P type sprayer and Shandong Huasheng Pesticide Co., Ltd. production Tarzan-18AC knapsack sprayer duster machine. As Chlorimuron ethyl herbicide is super efficient, re-spray, drip, it is likely to cause local agent concentration is too large to produce injury. In addition, before each medication must ensure that sprayer clean, avoid the other Yaoxie corn injury caused by pesticide residues.

In addition, naphthalic anhydride with corn seed coating can reduce Chlorimuron ethyl with organophosphate insecticides effect caused by the injury.

Remedial measures

Generally, the corn itself has strong resistance, Chlorimuron ethyl a slight phytotoxicity, without treatment, only temporarily inhibited growth of corn, can be restored after a period of time, does not affect the production. If severe injury, need to be addressed, we can use the following measures:

1. A Timely detoxification in Chlorimuron ethyl phytotoxicity has occurred or is about to occur, to take early measures to detox. On the initial injury on corn plants that can be used 3-5 times spray equipment wash water spray pesticide residues on plants.

2. To strengthen field management

(1) Pouring enough water, prompting a lot of corn roots absorb water to reduce the concentration of the herbicide plant body, relieve injury.

(2) Appropriate to increase the depth and frequency of hoeing, enhance soil aeration, and promote beneficial soil microbial activity, accelerate the decomposition of soil nutrients, enhance maize root under water and nutrient absorption capacity, so as soon as possible to restore normal maize plants growth and development.

(3) Spraying large cloud -120 (natural brassinolide) diluted 1500-fold or GA plus 1% urea aqueous solution or spiritual harm, leaf treasure diluted 500 times in the morning or evening dew dry with sprayer to spray both sides of the blade, and promote normal growth of plants, in order to effectively reduce injury.

(4) The injury occurred corn plots should be combined with water, increasing livestock manure composting facilities, ammonium bicarbonate, ammonium nitrate, urea and other fast-acting fertilizer to promote root development and regeneration, restoring victims corn physiology to reduce Chlorimuron ethyl phytotoxicity to corn damage. But also foliar spray of 1% -2% urea or 0.2% -0.3% potassium dihydrogen phosphate solution or Huimanfeng 600-800 times, resume normal growth favorable for corn. Should also actively controlling other corn pests, in order to improve the ability of maize to resist injury.

If the cornfields injury is the too heavy, these measures can not relieve victims extent, you can only take one or switching to other crops destroyed to avoid greater losses.

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