Which herbicides should be used for heat preservation cultivation of vegetables?

In recent years, to ensure that vegetables can be sold at a good price in the morning market during the cold season, farmers have increasingly adopted the practice of covering mulch film. This method helps raise soil temperature, maintain warmth, and promote earlier maturity of crops. Additionally, the use of herbicides and pesticides has become popular as it reduces labor costs and improves efficiency. However, after years of experience with chemical weeding under plastic films, it has become clear that improper use of herbicides can lead to several serious problems. If the wrong herbicide is chosen or the application method is incorrect, weeds may not be effectively controlled, which could result in phytotoxicity to the crops and environmental pollution, ultimately reducing the market value of the vegetables. To maximize the effectiveness of herbicides while minimizing risks, specific formulations are recommended for different types of vegetables. For solanaceous crops such as tomatoes, eggplants, and peppers, suitable options include 72% Duer EC (100–150 ml per mu) or 48% Dinobuton EC (150–300 ml per mu), both mixed with 30 kg of water and applied before covering the mulch. Another option is 33% Weeding EC (150–300 ml per mu) or 24% Gerol EC (50–100 ml per mu), along with 50% Sikhot WP (5,000 g per acre), all diluted in 40–50 kg of water and applied before seeding. For leguminous vegetables like peas, edamame, and cowpeas, the recommended herbicides include 48% Trifluralin EC (100–150 ml per mu) mixed with 40–50 kg of water, or 50% Oxalofenone WP (23–45 g active ingredient per mu) also diluted in 40–50 kg of water and applied to the soil before planting. Other options include 33% Weeding EC (150–200 ml per mu), 50% Acetochlor EC (150 ml per mu), or 50% Cimajin WP (33–100 g active ingredient per mu), all applied before seeding and covered with film. For cruciferous vegetables such as Chinese cabbage, red cabbage, cauliflower, and broccoli, 33% Weeding EC (100–150 ml per mu), 48% Cable EC (150–200 ml per mu), and 50% Dahuili WP (100–200 g per mu) are effective. These should be sprayed on the soil surface before covering the film, using 40–50 kg of water per mu. When applying herbicides under mulch film, there are several important considerations. First, the amount of water used should be sufficient to ensure proper coverage and absorption. Insufficient water can reduce the effectiveness of the herbicide. Second, repeated spraying should be avoided, as increasing the concentration can cause damage to the plants. Third, herbicides like Trifluralin and Oxazinone are highly volatile, so they must be thoroughly mixed into the top 2–3 cm of soil after application. Finally, the film must be tightly sealed to prevent leakage of the herbicide or the cover from being compromised. It is crucial to cover the film promptly after application to ensure optimal results. 【Comment】 【Print this article】 【Close this page】 【Large, medium and small】

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