Rice is one of my country's four major staple foods and an important food crop in the world. It is the main food component for about 60% of the world's population. Weed control in rice fields, especially the development of resistance to stephanotis and barnyard grass, has become increasingly serious and has become an important factor that troubles rice farmers and affects rice growth.
Triazosultrione is the world's first HPPD inhibitor herbicide that can be safely used in post-emergence stem and leaf treatments in rice fields to control grassy weeds. It can effectively control Echinacea weeds that are resistant to ALS inhibitors and ACCase inhibitors in rice fields, as well as Stephanotis that is resistant to ACCase inhibitors, and is of great significance to increasing rice yields.
Mechanism of action
Triazosultrione is a new type of hydroxyphenylpyruvate dioxygenase (HPPD) inhibitor herbicide. By inhibiting the activity of HPPD in plants, this type of product blocks the conversion of p-hydroxyphenylpyruvate into homogentisate, resulting in the failure of normal synthesis of tocopherol and plastoquinone. As a result, the catalytic function of phytoene desaturase (PDS) is blocked, which in turn affects carotenoid biosynthesis in the target body, causing leaves to turn white and die.
As a new HPPD inhibitor, triazulfentrione can destroy the biosynthesis of carotenoids, causing chlorophyll to lose protection, thereby affecting photosynthesis and leading to the death of weeds. Its mechanism of action is complex, so it is difficult for weeds to develop resistance.
application
Triazosultrione is the world's first HPPD inhibitor herbicide that can be safely used in post-emergence stem and leaf treatments to control grassy weeds in rice fields. It has a broad herbicidal spectrum and high post-emergence herbicidal activity, and is highly active against barnyardgrass, stephanotis, duckweed, sedge, rice sedge, rice barnyardgrass, etc. And there is no cross-resistance with the current mainstream herbicides in rice fields, such as cyhalofop, penoxsulam, and quinclorac. It can effectively control Echinacea weeds that are resistant to ALS inhibitors and ACCase inhibitors in rice fields, as well as Stephanotis weeds that are resistant to ACCase inhibitors; it is safe for rice and is suitable for rice transplanting fields and direct seeding fields.
In order to give full play to the efficacy of the product, the research shows that triadimefon should be sprayed on the stem and leaf when the weather is sunny (the best control effect is under 100% light intensity) and the temperature is higher than 20 ℃ (the best application temperature is 25~35 ℃) during the three leaf one heart stage of rice and the two to four leaf stage of barnyard grass. Drainage before application to ensure that more than 2/3 of the weeds are exposed to the water surface and the pesticide is fully applied; maintain a 3-5 cm water layer for more than 7 days 48 hours after application. It can be used up to once during the rice growth period. If rainfall occurs within 8 hours after application, additional spraying is required.
3 to 5 days after the application of triazotrione, the weeds turned significantly white; 5 to 7 days after the application, they began to wilt and dry up from top to bottom; 10 to 14 days after the application, the entire plant died.
Triazosultrione can be mixed with 2-methylbentazone to improve the control effect on broadleaf weeds and sedge weeds, achieve one-time control of grassgrass and improve weeding efficiency.
In addition, the study found that triazulfentrione also showed a certain control effect on barnyard grass that has not emerged (0-leaf stage), indicating that it has soil treatment activity.
