A: The “Preferred Sulfisomidine†mentioned in the text message should be 7.5% of sucralidine water dispersible granules of the Dow Corning Company (telephone). It is registered for the treatment of stems and leaves of winter wheat fields to control various annuals. For weeds, the recommended dosage per hectare of pure medicine is 10.55 to 14.06 grams, about 9.4 to 12.5 grams per mu.
The “HCFC-F†mentioned in the text message should be a 20% aqueous solution of difludroflourochlorine dispersant from Dow AgroScience, with 10% each of fluorochloropyridinate and diflufenzochlor. It is used to control broad-leaf weeds in stems and leaves of winter wheat fields. The recommended dosage is 15 to 19.5 grams per hectare of pure medicine, equivalent to 5 to 6.5 grams per mu, equivalent to chlorofluoropyridinate and diflufenzolide per acre. Each 0.5 to 0.65 grams.
The safety of the CFCs to wheat seedlings is good, and normal phytotoxicity will not occur. Sulfisophane is used improperly in wheat fields. If the dosage is too large, or if the wheat seedlings grow poorly due to frost, waterlogging and other reasons, the pesticide may occur, causing yellowing and growth inhibition of the wheat seedlings. Isoproturon will reduce the frost resistance of wheat seedlings. After a short-term application, the frost weather will cause “frozen phytotoxicityâ€, and serious wheat seedlings will die. The use of isoproturon increases the risk of injury will increase accordingly.
When the local wheat field is removed during the spring season, if the age and growth of the young wheat seedlings are normal, according to the method described in the text message, the amount of clodiosulfan and fluorochlorofluoroester is not large, and the amount of isoproturon is too large, but it is normal. The seedlings also have good safety under spraying conditions. The SMS message reflects the large number of deaths of wheat seedlings after application. The likely reason is that after the application, a severe cooling frost weather is encountered in the short term. On the one hand, wheat seedlings suffer from freezing injury due to the effect of isoproturon, and on the other hand, due to metabolic disorders in the body, Drugs such as sulfachlor weakened their tolerance to growth, impaired their growth, reduced their ability to recover, and did not recover easily. In severe cases, dead seedlings appeared.
This year's winter and spring temperatures are high, wheat seedlings have no obvious wintering period, and they always maintain growth at different speeds. Application of herbicides in the short-term sudden encounter with strong cooling weather is prone to phytotoxicity. Some time ago, Jiangsu and Anhui provinces and other regions had large-scale fields. After application of isoproturon, clodinafop-propargyl, tribenuron-methyl, and chlorofluoroacetic acid and other herbicides, they experienced severe cooling and frost weather in a short period of time. Wheat seedlings were affected differently. To a certain extent, the growth of light wheat seedlings was inhibited, heavy heavy wheat leaves were yellowed or withered, and a large number of wheat seedlings in whole plots died.
After the wheat seedlings are injured, spray the Bichu 0.136% erythromycin B WP as soon as possible (German Aggrelife Nonglin Environmental Biotechnology Co., Ltd. product, Jiangsu purchase contact telephone number, 15905165577). Appropriate fertilizer application will help Relieve phytotoxicity, promote the recovery of wheat seedlings, and reduce yield loss.
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