At present, in many places in Japan, Apia matrinae has developed strong resistance to the commonly used herbicide fenoxapropivein in wheat fields, especially in Japan. Less effective.
Compared with oxazolyoxime, clodinafop propargyl and its combination with oxazoline oxaliplatin have relatively good control effects on Japanese amature, and these two drugs can be used at low temperatures and are beneficial to In the early spring when the grass is young, weeding is used. When the grass age is relatively large, the dosage of clodinafop propargyl and its mixture with oxazoline oxalate should be increased to ensure the herbicidal effect.
The Dow Corning Company's newly introduced wheat field herbicide, the imidazolium, has good control effects on Japanese apricots and aphrodisiacs, and can be used preferentially in wheat fields mainly based on Japanese amaranth. . The drug can also be used during the cold period, and the dosage does not generally need to increase with the age of the grass.
Single-agent methylsulfurons from Bayer CropScience (Smar 30g/litre methylsulfuron oil suspension) and its mixture with methyl iodomuron (Kwastama), for Japan Acacia also has good control effect, but the use of drugs is relatively high and can be selected according to local conditions.
The sensitivity of different types of wheat varieties to methylsulfuron was not the same. Some hard wheat varieties such as Yangmai 158, Yumai 18 and Jimai 20 were more sensitive to the drug and relatively more prone to phytotoxicity after application. The main performance is the yellowing of the wheat leaf and the growth inhibition. In mildly affected wheat seedlings, temporary yellowing or dwarfing may occur. Under normal use conditions, the yellowing of the wheat will naturally disappear after it turns green; when the damage is heavy, some of the poorly-quality wheat seedlings will die, and if they do not die, they will need to restore their growth. The time is longer, and some may last for 30 to 50 days. After the winter and early spring damages, the growth of the normal wheat seedlings can not be resumed until they return to the green period. Since the temperature rises later, the growth potential of the wheat seedlings can be restored quickly. Due to the suppression of growth during the effective delivery period in winter and spring, the amount of tillering will be reduced. When the number of stems and seedlings is smaller when the wheat seedlings are affected, the number of final panicles will be reduced, and the yield will be reduced. In addition, the damage of heavy wheat seedlings, vegetative growth in the winter and spring reduced, to the temperature of the wheat seedlings to restore the growth has been high, smaller vegetative wheat seedlings will quickly jointing and ear differentiation, the final formation of a small wheat ear, yield is low.
Most northern strong gluten and medium gluten wheat varieties belong to keratinous wheat cultivars. Zhengmai 9023, Zhengmai 366 and Zhoumai 22 belong to horny wheat cultivars. However, they are not necessarily sensitive to methylsulfuron. Production can be conducted on a small-scale safety test first, and after successful experience is used in large areas.
From the perspective of production applications in recent years, methylsulfuron monosolve and its mixture with methyl iodosulfuron have a large area of ​​application in the Huanghe-Huaihe River Basin. Overall, the safety of wheat seedlings is better. Anti-resistance Japan One of the preferred medicines for virulent weeds such as Aegilops taurangensis and Aegilops tauschii. On the contrary, in the southern region, in some heavily wet wheat fields, the incidence of phytotoxicity after applying methylsulfuron-methyl and its mixture with methyl iodomuron-methyl is higher.
Therefore, it can be considered that the use of methylsulfuron in soils with high soil moisture and susceptible wheat seedlings is more risky and generally not used; different wheat varieties have different susceptibility to methylsulfuron, but overall In other words, even some of the more sensitive varieties, as long as the proper application of pesticides, will not produce serious injury, and still have better applicability.
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