Sodium nitrophenolate is a broad-spectrum plant growth regulator that can be applied across various crops and throughout different growing seasons, delivering excellent results in each case. Once applied, it rapidly penetrates plant tissues, stimulating protoplasmic flow within cells, enhancing cell division and proliferation, promoting chlorophyll and protein synthesis, breaking seed dormancy, accelerating germination, root development, flower bud formation, and early flowering. It also helps increase fruit weight, prevent flower drop, and reduce the apical dominance caused by indole acetic acid, thereby encouraging the growth of axillary buds.
This compound is widely used in food crops such as rice, wheat, beans, corn, rapeseed, sesame, cotton, leafy vegetables, cruciferous vegetables, tomatoes, cucumbers, eggplants, watermelons, melons, citrus, apples, lychees, bananas, longans, mangoes, and pineapples. It significantly boosts crop yield, improves product quality, and enhances overall profitability for farmers.
**Application Techniques**
1. **Breaking Seed Dormancy**
- For barley and wheat: Soak seeds in a 1.8% sodium nitrophenolate solution diluted 6000 times for 12 hours before planting. This promotes germination and strong root development.
- For rice: Soak 1 kg of seeds in 1 L of 1.8% sodium nitrophenolate (diluted 6000 times) for 12–24 hours, then drain and sow when dry.
- For soybeans: Soak seeds in 3 mg/L solution for 3 hours to enhance root growth.
- For cucumbers: Soak seeds in 3 mg/L solution for 12 hours to speed up germination, develop strong roots, and improve disease resistance.
2. **Adjusting Flower Proportion and Increasing Yield**
- For citrus: Apply 1.4% sodium nitrophenolate diluted 5000 times during the flowering stage, spray once 14 days before blooming, again 1–7 days later, and every 30 days thereafter. This increases fruit set by 28.67%.
- For apples: Spray 6 mg/L solution every 20 days before flowering, during flowering, and in the fruiting stage. This improves nitrogen, phosphorus, amino acids, and vitamin C content in fruits while increasing fruit hardness and storage life.
- For pears: Applying 1.8% sodium nitrophenolate diluted 5000 times increases fruit set by 6%–25.53%, yields by 18%–21.5%, and fruit size by 15.69%.
- For grapes: Spraying 1.8% sodium nitrophenolate (diluted 5000 times) before and after flowering increases fruit set by 78.97%. Adding borax further improves this effect.
- For litchi: Spraying 1.8% sodium nitrophenolate diluted 3000 times before and after flowering improves soluble solids, yield, and fruit quality.
- For tomatoes: Apply 1.8% sodium nitrophenolate diluted 4000 times during seedling, flowering, and fruit formation stages to boost plant height, fruit setting rate, and yield.
- For cucumbers: Spraying 8% sodium nitrophenolate diluted 6000 times during early fruiting and flowering stages increases female flowers, fruit set, and harvest quality.
- For watermelons: Apply 1.8% sodium nitrophenolate diluted 6000 times at multiple growth stages to enhance vine growth, reduce wilt disease, and increase yield and sugar content.
- For Dongzao: Spraying 1.8% sodium nitrophenolate diluted 6000 times during flowering and fruit development stages improves fruit set and yield.
3. **Promoting Vegetative Growth and Enhancing Quality**
- For rice: Apply 1.8% sodium nitrophenolate diluted 500–600 times during transplanting, booting, and heading stages to increase yield by 12%–22%.
- For barley and wheat: Use 1.8% sodium nitrophenolate diluted 3000 times during seedling, jointing, and filling stages to improve grain weight and quality.
- For sorghum: Apply 1.8% sodium nitrophenolate diluted 4000–6000 times during heading and flowering stages to enhance yield and quality.
- For soybeans: Spray 1.8% sodium nitrophenolate diluted 4000 times during flower bud, pod formation, and young pod stages to increase grain weight and protein content.
- For green beans: Spraying 1.4% sodium nitrophenolate diluted 5000–6000 times increases yield by 25–27% and advances harvesting by 8–10 days.
- For tea plants: Apply 1.8% sodium nitrophenolate diluted 5000 times to promote bud elongation, increase chlorophyll content, and boost annual tea yield by 29.7%.
- For cotton: Spraying 1.8% sodium nitrophenolate during early flowering and fruiting stages increases fruit set and yield by 29.3% in seed cotton.
- For rapeseed: Apply 1.4% sodium nitrophenolate diluted 5000 times during regreening, early flowering, and final flowering stages to increase effective pods and grain weight.
- For tobacco: Spray 1.8% sodium nitrophenolate diluted 12000 times twice during leaf development to increase superior smoke quality and economic value.
- For sugarcane: Apply 1.8% sodium nitrophenolate diluted 3500 times during seedling, tillering, and elongation stages to promote tillering and increase sugar content.
- For peanuts: Spray 1.8% sodium nitrophenolate diluted 3000 times during the 4th, 8th, and 12th leaf stages to improve root development and increase full fruit count.
- For beets: Apply 1.8% sodium nitrophenolate diluted 5000 times twice during growth to increase root weight and sugar content.
- For mushrooms: Spraying 1.8% sodium nitrophenolate diluted 6000 times during the fruiting stage enhances yield and prolongs harvest period.
**Similar Products**
Sodium nitrophenolate has similar compounds with slightly different physical properties due to variations in the hydroxy group on the benzene ring. However, their chemical properties and biological activity are nearly identical, and they are used similarly in agriculture. Due to its stability, sodium nitrophenolate is more commonly used in farming practices.
**Precautions**
- Avoid high concentrations, as they may inhibit plant growth.
- Ensure even spraying, especially on waxy leaves, and use a spreader agent if needed.
- Can be mixed with pesticides and fertilizers for better results.
- For tobacco, apply 30 days before harvest.
- Store in a cool, dry place.
This article was published by the **China Pesticide Network**, please cite the source!
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