Clodinafop-propargyl should not be mixed with chlormequat
Mr. Zou, Daxing Town, Suyu District, Suqian City, came to the telephone: Can wheat fields use clodinafop-propargyl esters with CMC and carbendazim to achieve the purpose of simultaneously weeding, regulating wheat growth, and preventing disease? Clodinafop-propargyl is a commonly used stem and leaf herbicide for control of grassy weeds in wheat fields, and can control weeds such as wild oats, aphrodisiacs, hardgrass, grasses, and stickhead weeds. Clodinafop-propargyl esters have good safety to wheat, and can be applied before the 2 leaf 1 heart period to the jointing stage of wheat. Grasp the grass in the 2 to 4 leaf stage application, generally use clodinafop-propellic acid 3 to 4.5 grams per mu. When the grass age is increased, the dosage should be increased appropriately, and when the drug resistance of field weeds is strong, the dosage should be increased appropriately. The use of clodinafop-propargyl esters in the low-temperature period also has good herbicidal efficacy and is also safe for wheat seedlings. However, when the temperature is changeable and the low-temperature multiple spraying period is applied, attention should be paid to the weather forecast. In the “cold tail warmer†application, it is generally required that strong cold temperature and low temperature weather do not occur within one week after application. After a short period of time in the case of strong cold temperature and frost weather, wheat is prone to phytotoxicity, and when severe, it can cause dead seedlings. Chlormequat is a gibberellin biosynthesis inhibitor, which has the effects of retarding plant growth, reducing longitudinal elongation, shortening internodes, promoting tillering, and improving lodging resistance, and has a strong inhibitory effect on wheat growth. Clodinafop-propargyl also has a certain inhibitory effect on the growth of wheat. In the normal wheat growing season when the application of pesticides, clomazone ester pure medicinal amount of 6 grams below 6 grams, the safety of wheat seedlings; pure drug dosage of more than 6 grams of mu, the decline in the safety of wheat seedlings, will cause the inhibition of growth of wheat seedlings; pure drug When the amount of mu is more than 7.5 g, the growth of wheat seedlings is obviously inhibited, which can cause the yellow leaves of wheat seedlings to appear yellow. When the amount of pure mu is more than 9 grams, the wheat seedlings will be severely poisoned and serious seedling emergence. The wheat leaves will be severely yellow and the root growth will be obstructed. The use of chlormequat and clodinafop-propargyl esters will reduce the resistance of wheat to herbicides and increase the risk of harm to wheat seedlings by clodinafop-propargyl. It should not be used in combination, especially in the case of weak seedlings or strong cooling in the short term. Wheat seedlings are easily damaged during the weather. In the case of prosperous wheat, when the temperature is higher, the appropriate amount of chlormequat is mixed with clodinafop-propargyl. Generally, there is no adverse effect; attention should be paid to the fact that there is no strong cooling and low-temperature weather in the short-term after application. The dosage of chlormequat should be based on wheat growth. The situation is flexible. The carbendazim has good miscibility, and the wheat field mixes clodinafop-propargyl ester or chlormequat with carbendazim. Generally, it has no adverse effect on wheat and can usually be used in tanks. However, carbendazim is used in wheat fields and is mainly suitable for controlling head blight in heading and flowering, and it is not ideal for other wheat diseases. Clodinafop-propargyl and chlormequat are generally required to be used before the jointing of wheat, and it takes a long time to control the scab to prevent the use of carbendazim.
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