Key Practical Points for Crop-Specific Plant Protection
Rice: Chemical Control for Lodging Resistance
Spray 10% uniconazole wettable powder (20–30 g/mu mixed with 30 kg of water) evenly onto the stems during the early jointing stage. This shortens basal internodes and increases stem thickness by over 30%, significantly enhancing lodging resistance and facilitating mechanized harvesting.
Wheat: Controlling Excessive Growth and Preventing Premature Senescence
Spray 15% paclobutrazol wettable powder (40–50 g/mu mixed with water) between the green-up and early jointing stages. During the flowering and grain-filling stages, apply a mixture of brassinosteroids and potassium dihydrogen phosphate in conjunction with the "one spray, three preventions" (pest, disease, and stress control) regimen to guard against dry hot winds and premature senescence, potentially increasing the 1,000-grain weight by 8%–12%.
Soybeans: Controlling Excessive Growth and Increasing Pod Formation
Spray 5% prohexadione-calcium suspension concentrate (20 ml/mu mixed with 30 kg of water) at the 4–6 compound leaf stage. For plots showing vigorous growth, a follow-up spray at half the dosage during early flowering can reduce flower and pod drop, increasing the number of pods per plant by approximately 20%.
Cotton: Full-Season Chemical Control
Adhere to the principle of "light application early, heavier application later; small amounts, multiple applications." Apply 98% mepiquat chloride (0.3–0.5 g/mu) lightly during the seedling stage. After topping, apply chemical control in three progressive stages to shape a compact, well-ventilated plant structure capable of high yields, potentially increasing the number of bolls per plant by 3–5.
Root and Tuber Crops: Promoting Underground Tuber Expansion
When potato plants reach 30–40 cm in height, or 30–40 days after sweet potato transplanting, spray a 10% uniconazole-mepiquat chloride compound formulation (20 g/mu mixed with water). This inhibits excessive vine growth, directing nutrients to the underground tubers and accelerating tuber expansion by 30%.
Spray 10% uniconazole wettable powder (20–30 g/mu mixed with 30 kg of water) evenly onto the stems during the early jointing stage. This shortens basal internodes and increases stem thickness by over 30%, significantly enhancing lodging resistance and facilitating mechanized harvesting.
Wheat: Controlling Excessive Growth and Preventing Premature Senescence
Spray 15% paclobutrazol wettable powder (40–50 g/mu mixed with water) between the green-up and early jointing stages. During the flowering and grain-filling stages, apply a mixture of brassinosteroids and potassium dihydrogen phosphate in conjunction with the "one spray, three preventions" (pest, disease, and stress control) regimen to guard against dry hot winds and premature senescence, potentially increasing the 1,000-grain weight by 8%–12%.
Soybeans: Controlling Excessive Growth and Increasing Pod Formation
Spray 5% prohexadione-calcium suspension concentrate (20 ml/mu mixed with 30 kg of water) at the 4–6 compound leaf stage. For plots showing vigorous growth, a follow-up spray at half the dosage during early flowering can reduce flower and pod drop, increasing the number of pods per plant by approximately 20%.
Cotton: Full-Season Chemical Control
Adhere to the principle of "light application early, heavier application later; small amounts, multiple applications." Apply 98% mepiquat chloride (0.3–0.5 g/mu) lightly during the seedling stage. After topping, apply chemical control in three progressive stages to shape a compact, well-ventilated plant structure capable of high yields, potentially increasing the number of bolls per plant by 3–5.
Root and Tuber Crops: Promoting Underground Tuber Expansion
When potato plants reach 30–40 cm in height, or 30–40 days after sweet potato transplanting, spray a 10% uniconazole-mepiquat chloride compound formulation (20 g/mu mixed with water). This inhibits excessive vine growth, directing nutrients to the underground tubers and accelerating tuber expansion by 30%.
