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Ethoxyfluazone easily causes yellow spots in wheat leaves
Yuwen County, Youyang County, Yuyang County, said on November 26th that his five acres of land wheat was in the 3-leaf stage. Four days ago, he used 10% tribenuronic-methyl WP in 15 grams plus 12 grams of additives. 30 kilograms of spray appeared yellow spots on wheat leaves 2 days after spraying, as long as there were yellow spots on the leaves of the wheat sprayed. He learned from the dealer that the auxiliaries in the tribensulfuron product are likely to be 10% ethyl floroxine EC. He asked if the yellow spots on wheat leaves were cured by herbicides. Tribenuron is a sulfonylurea-residual transmissive bud selective herbicide. After stems and leaves are treated, it can be absorbed by stems, leaves and roots of weeds, and is transmitted through the body. It blocks acetolactate synthase and makes valine The biosynthesis of isoleucine is inhibited, preventing cell division and killing weeds. The growth of 10-14 field weeds was severely inhibited after spraying, and the heart gradually faded into chlorosis and necrosis. The leaves were chlorotic. Generally, the whole plant died after 30 days of application, and the growth of un-dead plants was inhibited. The effect was relatively slow. The average amount of tribenuron-methyl per gram of pure drug is 1.5-3 grams (equivalent to 10-30 grams of tribenuron-methyl WP per acre). The maximum amount cannot exceed 3 grams. Otherwise, it is easy to produce phytotoxicity. Use 10% of tribenuron-methyl wettable powder per acre, add 30 kg of water spray, generally do not cause damage to wheat. The above-mentioned wheat in the field appeared yellow patches on the leaves after spraying. It should not be related to the spraying of tribenuron-methyl. It may be caused by other reasons. Ethoxyfluazone is a contact-killing herbicide that can effectively control various broad-leaved weeds such as Polygonaceae, Polygonaceae weeds, Amaranth, Xanthium, Solanum nigrum, Portulaca oleracea, Commelina communis and Euphorbia esculenta. After the drug is absorbed by the plant, tetrapyrrole, which is toxic to the plant cells, is generated and accumulates. The effect is rapid and the activity is high. Normal application of the drug in wheat fields may produce contact patch or cause yellowing of wheat seedlings on wheat leaves. When the application amount is too large, the phytotoxicity to wheat seedlings is heavier when it is exposed to low temperatures after application, and it may cause serious damage to wheat leaves. Severe yellowing or even the death of the whole plant. The use of ethyl flufenamol in wheat fields requires temperatures above 10°C, otherwise it is prone to phytotoxicity. Wheat is harmed by flufenoxan, which usually shows symptoms of phytotoxicity 2-3 days after application. According to Ju Wenquan, the trimethoprim-based product's auxiliary agent is likely to be ethyl fluorosilfen. Therefore, the wheat in the above-mentioned plots is likely to be harmed by ethyl flufenazone, resulting in the appearance of yellow-colored spots on the leaves. Wheat is harmed by flufenoxan. When the symptoms are mild, it can recover naturally after a period of time. No special measures are needed to remedy the disease. If the symptoms are heavy, spray humic acid, sodium nitrophenolate, and glucosinolates. Endorphins and other drugs, fertilizers, to promote the recovery of wheat growth.