How to use paclobutrazol and uniconazole for raising strong rice seedlings

Paclobutrazol and uniconazole are both plant growth regulators. When applied in rice seedling raising, they have good effects on controlling growth and promoting tillering, preventing seedling stiffness and seedling rot, and increasing panicles, grains and yield. The method for using paclobutrazol is: when the seedlings have one leaf and one heart, evenly spray 100 kg of paclobutrazol solution at a concentration of 300 ppm per mu of seedling field, ensuring no missed spraying and no repeated spraying. When spraying, drain the water from the seedling field and keep the field surface free of standing water. The method for using uniconazole is: soak the seeds with uniconazole solution at a concentration of 50-200 ppm for 24-48 hours, with a ratio of seeds to chemical of 1:1.2-1.5. During soaking, stir 3-4 times so that the seeds absorb the chemical evenly. After soaking, rinse with clean water before sprouting. For seeds treated by soaking with uniconazole, soak and sprout 1 day earlier than conventional practice.