At present, post-emergence stem and leaf treatment agents are mainly a mixture of nicosulfuron and atrazine. Safety problems have frequently occurred in recent years. First, many densely planted varieties such as Zhengdan 958 have been promoted in large areas. , Denghai series and Yuzi series varieties are highly sensitive to nicosulfuron herbicide; secondly, phytotoxicity often occurs when corn is used after the 4-leaf stage, and the technical links are difficult to grasp; thirdly, weeding after the 6-leaf stage of corn must be smooth This method is very inconvenient when applying pesticides or wearing a protective cover; fourthly, under high temperature or drought conditions, nicosulfuron has aggravated the damage to corn, causing leaves to become yellow and wrinkled, and even failure to produce ears, thus reducing yields and causing disputes. .
In order to ensure the safe production of corn, in accordance with the requirements of the National Agricultural Technology Promotion Center and the actual situation of our province, in 2008 it is planned to vigorously promote the latest development of "Mesotrione·Atrazine (Mesotrione·Atrazine)" by the Swiss Syngenta Company Gengjie)” new product for post-emergence stem and leaf treatment. A large number of experiments and demonstrations have proven that this new herbicide is safe for corn post-emergence stem and leaf treatment, has no strict requirements on moisture, is highly quick-acting, and causes weed death in 7 to 14 days after treatment. Specific technical requirements: (1) Spray grass weeds before they have 3 leaves, and broadleaf weeds before they have 4 leaves; (2) Use Genjie 100 ml/mu plus 0.5% auxiliary for summer corn fields, and 120 ml/mu for spring corn fields. Add 0.5% additive per mu; (3) Spray evenly and thoughtfully, without heavy weight or leakage, and the amount of liquid per mu is 30 kilograms; (4) Secondary dilution method should be used to prepare the liquid to ensure the weeding effect. (5) Sweet corn, waxy corn, and popcorn corn should not be used; (6) Do not mix with organophosphorus pesticides and carbamate pesticides.
Genjie is an innovative post-emergent stem and leaf treatment herbicide protected by Syngenta's patent. Its unique mechanism of action ensures that it can quickly and broadly control most broadleaf grasses and major grasses in corn fields. It is an undergraduate weed and has extremely high safety, so it is very suitable for comprehensive management of corn weeds and fully unleashes the potential of corn yield, bringing higher profits to corn planting. It is suitable for plots where soil sealing has failed and where soil sealing agents will not be applied in the future.
Genjie is Syngenta’s latest herbicide introduced by Syngenta for early post-emergence stem and leaf treatment in corn fields protected by my country’s patent. The main ingredients are mesotrione and atrazine. It acts quickly, has a broad spectrum of herbicides and is safe for corn. It has excellent rapid effect and ideal long-lasting effect, and has excellent control effect on most annual broadleaf weeds and some grass weeds in corn fields. It has no cross-resistance with other corn field herbicides and is suitable for controlling weeds that have developed resistance.
Gengjie has the following characteristics: 1. Excellent broadleaf weed control effect, which can eliminate most broadleaf weeds and grassy weeds. It is suitable for controlling malignant weeds in corn fields, such as orchid (duckweed), gray cabbage, milfoil, horsetail, nightshade, polygonum, cocklebur, amaranth, endive, spinach, crabgrass, barnyard grass, etc. It has ideal medicinal effect. 2. High safety. Treating stems and leaves with twice the recommended dose is safe for corn. 3. It has fast absorption and rapid onset of effect, and the control effect can be seen 3-4 days after application. 4. Low water consumption. Spraying 15 kilograms of liquid per acre of land can ensure the efficacy and save water and labor. 5. The efficacy is stable. Under drought conditions, the efficacy is more stable than other herbicides. Rainfall within three hours of application does not affect the efficacy. 6. Safety for the next crop. At the recommended dose, it will not affect the growth of the next crop.
The application period of Gengjie is when corn reaches 2-4 leaves, broadleaf weeds reach 2-4 leaves, and monocotyledonous weeds reach 3 leaves. The effect is ideal. Gengjie’s recommended application rate is 125 ml/acre.
Gengjie is now widely used in major corn-producing countries abroad. In 2008, the National Agricultural Technology Extension Center collaborated with Syngenta to carry out Gengjie technology demonstration and promotion work in eight major corn-producing provinces across the country, including the three northeastern provinces. The popularization and application of this technology will solve the problems of post-sowing and pre-emergence closed weeding in my country's corn fields, which are affected by soil moisture and weed resistance and have poor efficacy, and the drift of post-emergence stem and leaf treatment chemicals harms economic crops such as vegetable seedlings and environmental pollution.
It has less impact on transplanted rice and greater impact on direct-seeded rice. As long as the dosage is not exceeded, it will not cause harm to rice