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Paclobutrazol is a plant growth regulator and fungicide newly developed by the British Empire (ici) Chemical Company in the late 1970s. It is a plant growth retardant, also known as an inhibitor. Paclobutrazol is a highly effective and low-toxic plant growth retardant, which can increase the content of chlorophyll, protein and nucleic acid in plants, reduce the content of gibberellin and indole acetic acid, increase the release of ethylene, and enhance the resistance to lodging, drought and cold. And resistance to disease and other stress, increase production, improve quality and improve economic efficiency. It has received widespread attention and is considered to be one of the best growth retardants to date. Vegetables are sensitive to the reaction of paclobutrazol, and the concentration should be different depending on the weather, crop type, different growth period, and different concentrations. Our experience shows that the low concentration in the effective range is adopted; as long as the stems and leaves of the plants are sprayed, the drops are not drastically sprayed, and the foliar sprays are applied as far as possible, without soil application. In order to avoid adverse effects on the crops in the later seasons, the general situation can only be sprayed once. In order to facilitate the rational use of paclobutrazol by the majority of vegetable farmers, combined with our practical experience in recent years, collect and organize relevant information for your reference.
1, root vegetables 1.1 radish 1.1.1 to promote the increase in production of anti-heart (1) 3 ~ 5 pieces of true leaves, spray with 45mg / l paclobutrazol solution. Increase resistance and reduce morbidity. (2) In the early stage of the formation of fleshy roots, spray with 100 mg/l of paclobutrazol solution. It can inhibit the growth of plants, inhibit the bolting, make the leaves of the plants green, the leaves are short and stand upright, enhance photosynthesis, and promote the transport of photosynthetic products to fleshy roots, which can increase yield by 1~20%. It can also prevent jealousy and improve merchandise.
1.1.2 Regulate the flowering period in hybrid seed production. In the bud flower stage, spray with 25mg/l and 50mg/l paclobutrazol solution, the initial flowering period is delayed for 6d~8d, and the number of branches is increased.
2, green leafy vegetables 2.1 Chinese cabbage inhibition of bolting, spraying 50mg / l ~ 100mg / l paclobutrazol solution in the late growth stage, can inhibit bolting, delay flowering.
2.2 Cabbage 2.2.1 Inhibition of bolting In the late stage of growth, the heart leaf can be sprayed with 50 mg/l to 100 mg/l paclobutrazol solution to inhibit bolting.
2.2.2 Increase seed collection In the 3~4 leaf stage, spray the plants with 50mg/l～100mg/l paclobutrazol solution, dwarf plants, increase the seed collection by 10%-20%.
2.3 Cabbage is cultivated and vigorously sprayed with 50 mg/l to 75 mg/l paclobutrazol solution at 2 leaves and 1 heart.
2.4 Laver moss Controlling the length of the plant, increasing the yield, spraying with 200mg/l paclobutrazol solution at the 3-leaf stage, can increase yield by 26.1%.
2.5 Lettuce The anti-cancer, autumn lettuce is sprayed with 200mg/l paclobutrazol solution during the rosette period.
3, Solanum fruit vegetables 3.1 Tomato 3.1.1 Cultivate Zhuangzi (1) Seedlings 2 to 3 leaf stage sprayed with 10mg/l ~ 50mg / l paclobutrazol solution, dwarf plants, to prevent length. (2) Autumn tomato 3 leaf stage sprayed with 50mg/l ~ 100mg / l paclobutrazol solution, can be cultivated. (3) In tomato seedling seedlings, 3 leaves and 1 heart were sprayed with 10 mg/l paclobutrazol solution. (4) Autumn tomato seeds are sown after 6 hours of soaking in the concentration of 0.05% to 0.1% of the active ingredient, which can effectively inhibit the growth of plant height in the early stage of seedlings.
3.1.2 Dwarf plants (1) One week after transplanting, spray with 25mg/l or 50mg/l paclobutrazol solution. (2) After the tomato is slowed down, spray with 75 mg/l of paclobutrazol.
3.1.3 Promote fruit ripening After the fruit is finished, spraying with 5000mg/l paclobutrazol can inhibit vegetative growth and promote fruit ripening.
3.2 Eggplant 3.2.1 Cultivate the strong sputum Spray with 10mg/l ~ 20mg / l paclobutrazol solution at 5 ~ 6 leaves, can dwarf the seedlings, prevent the length.
3.2.2 Increasing the yield When spraying with 350mg/l paclobutrazol solution in the eye of eggplant, it can increase yield by 26%.
3.3 peppers (including sweet peppers)
3.3.1 Cultivate Zhuangshen In the 3~4 leaf stage of the seedlings, spray with 5mg/l~25mg/l paclobutrazol solution to cultivate strong sputum.
3.3.2 Dwarf plants Anti-aphid, increase yield (1) After 100min soaking with 100mg/l paclobutrazol solution, transplanted. (2) Spray 25mg/l or 50mg/l paclobutrazol solution one week after transplanting. (3) Spraying 100mg/l to 200mg/l paclobutrazol solution in the middle and long term.
3.4 Ginseng Fruit Cultivate strong seedlings and control the length of the seedlings. When cutting seedlings, the seedlings are sprayed once every 15cm, 15% paclobutrazol wettable powder 800 times, can control the plant height, increase stem diameter and branching into short and strong seedlings. After spraying about 800 days after planting, 800 times of liquid can be used to control the length.
4, melons and vegetables 4.1 Cucumber 4.1.1 Cultivate the sturdy sputum The sputum sputum sputum 1 leaf 1 heart period with 20mg / l paclobutrazol solution spray or watering, can improve the quality of seedlings.
4.1.2 Regulate plant shape, promote female flower differentiation, enhance stress resistance 30d after 30ml, spray with 30mg/l ~ 70mg / l paclobutrazol solution, can make the section short stem thick, compact plant shape, reduce female flower node, leaf color thick Green, disease resistance and cold resistance are enhanced.
4.1.3 Increase the yield During the picking period of roots, spray with 400mg/l paclobutrazol to increase yield by 26%. The four-leaf stage of autumn cucumber in greenhouse was sprayed with 100mg/l paclobutrazol solution, the internodes were shortened, the plant shape was compact, and the stems were thickened. For powdery mildew, downy mildew resistance, increased cold resistance, increased number of fruit set, increased yield by 19.4%.
4.2 Zucchini 4.2.1 Cultivate strong seedlings When 3 to 4 true leaves are used, the seedlings are sprayed with 4 mg/l to 20 mg/l of paclobutrazol to shorten the internodes, thicken the leaves, increase the green color, resist the cold and resist drought.
5. Beans and vegetables 5.1 Beans 5.1.1 In the early stage of growth, spray with 50mg/l ~ 75mg / l paclobutrazol solution to prevent the length, improve the population structure, enhance photosynthesis, increase the number of main stems by 5% ~ 10%, the pod rate increased by about 20%.
5.1.2 Increase the yield The initial flowering period is sprayed with 100mg/l liquid, and the 667 square meters can increase the yield by 217.9kg.
5.2 edamame 5.2.1 anti-canon, in the case of 5 to 6 leaves, sprayed with 50mg / l ~ 75mg / l paclobutrazol solution, stems thick, shorten the internodes, promote branching, steady growth.
5.2.2 Increase the yield from the initial flower to the full bloom period, (closed early, long-term premature medication) with 100mg / l ~ 200mg / l paclobutrazol solution, can increase effective branching, effective pod number, pod weight, Increase production by about 20%.
6, other vegetables 6.1 芋艿 1 month before the closure of the taro, with 10mg / l paclobutrazol solution rooting, each plant 100ml, can increase production by about 40%.
6.2 When the yam vine grows to the top of the rack, it is sprayed with 200mg/l paclobutrazol solution. If it grows too much, it can be sprayed once every 5~7d, and even sprayed 2~3 times to inhibit the growth of stems and leaves and promote the germination of side branches. Flower buds develop, tuber enlargement, increasing yield by about 10%.
6.3 Toon 6.3.1 Controlling the length of the plant is 40cm ~ 50cm in height, from early August to early September, spray with 300mg / l paclobutrazol solution, spray once every 10d, even spray 2 to 3 times.
6.3.2 Increase the yield and quality of shoots From the middle and late July, use 200-400 times 15% paclobutrazol wettable powder, spray once every 10~15d, even spray 2~3 times to make the plant dwarf and enhance photosynthesis. Improve the yield and quality of the shoots.
1, root vegetables 1.1 radish 1.1.1 to promote the increase in production of anti-heart (1) 3 ~ 5 pieces of true leaves, spray with 45mg / l paclobutrazol solution. Increase resistance and reduce morbidity. (2) In the early stage of the formation of fleshy roots, spray with 100 mg/l of paclobutrazol solution. It can inhibit the growth of plants, inhibit the bolting, make the leaves of the plants green, the leaves are short and stand upright, enhance photosynthesis, and promote the transport of photosynthetic products to fleshy roots, which can increase yield by 1~20%. It can also prevent jealousy and improve merchandise.
1.1.2 Regulate the flowering period in hybrid seed production. In the bud flower stage, spray with 25mg/l and 50mg/l paclobutrazol solution, the initial flowering period is delayed for 6d~8d, and the number of branches is increased.
2, green leafy vegetables 2.1 Chinese cabbage inhibition of bolting, spraying 50mg / l ~ 100mg / l paclobutrazol solution in the late growth stage, can inhibit bolting, delay flowering.
2.2 Cabbage 2.2.1 Inhibition of bolting In the late stage of growth, the heart leaf can be sprayed with 50 mg/l to 100 mg/l paclobutrazol solution to inhibit bolting.
2.2.2 Increase seed collection In the 3~4 leaf stage, spray the plants with 50mg/l～100mg/l paclobutrazol solution, dwarf plants, increase the seed collection by 10%-20%.
2.3 Cabbage is cultivated and vigorously sprayed with 50 mg/l to 75 mg/l paclobutrazol solution at 2 leaves and 1 heart.
2.4 Laver moss Controlling the length of the plant, increasing the yield, spraying with 200mg/l paclobutrazol solution at the 3-leaf stage, can increase yield by 26.1%.
2.5 Lettuce The anti-cancer, autumn lettuce is sprayed with 200mg/l paclobutrazol solution during the rosette period.
3, Solanum fruit vegetables 3.1 Tomato 3.1.1 Cultivate Zhuangzi (1) Seedlings 2 to 3 leaf stage sprayed with 10mg/l ~ 50mg / l paclobutrazol solution, dwarf plants, to prevent length. (2) Autumn tomato 3 leaf stage sprayed with 50mg/l ~ 100mg / l paclobutrazol solution, can be cultivated. (3) In tomato seedling seedlings, 3 leaves and 1 heart were sprayed with 10 mg/l paclobutrazol solution. (4) Autumn tomato seeds are sown after 6 hours of soaking in the concentration of 0.05% to 0.1% of the active ingredient, which can effectively inhibit the growth of plant height in the early stage of seedlings.
3.1.2 Dwarf plants (1) One week after transplanting, spray with 25mg/l or 50mg/l paclobutrazol solution. (2) After the tomato is slowed down, spray with 75 mg/l of paclobutrazol.
3.1.3 Promote fruit ripening After the fruit is finished, spraying with 5000mg/l paclobutrazol can inhibit vegetative growth and promote fruit ripening.
3.2 Eggplant 3.2.1 Cultivate the strong sputum Spray with 10mg/l ~ 20mg / l paclobutrazol solution at 5 ~ 6 leaves, can dwarf the seedlings, prevent the length.
3.2.2 Increasing the yield When spraying with 350mg/l paclobutrazol solution in the eye of eggplant, it can increase yield by 26%.
3.3 peppers (including sweet peppers)
3.3.1 Cultivate Zhuangshen In the 3~4 leaf stage of the seedlings, spray with 5mg/l~25mg/l paclobutrazol solution to cultivate strong sputum.
3.3.2 Dwarf plants Anti-aphid, increase yield (1) After 100min soaking with 100mg/l paclobutrazol solution, transplanted. (2) Spray 25mg/l or 50mg/l paclobutrazol solution one week after transplanting. (3) Spraying 100mg/l to 200mg/l paclobutrazol solution in the middle and long term.
3.4 Ginseng Fruit Cultivate strong seedlings and control the length of the seedlings. When cutting seedlings, the seedlings are sprayed once every 15cm, 15% paclobutrazol wettable powder 800 times, can control the plant height, increase stem diameter and branching into short and strong seedlings. After spraying about 800 days after planting, 800 times of liquid can be used to control the length.
4, melons and vegetables 4.1 Cucumber 4.1.1 Cultivate the sturdy sputum The sputum sputum sputum 1 leaf 1 heart period with 20mg / l paclobutrazol solution spray or watering, can improve the quality of seedlings.
4.1.2 Regulate plant shape, promote female flower differentiation, enhance stress resistance 30d after 30ml, spray with 30mg/l ~ 70mg / l paclobutrazol solution, can make the section short stem thick, compact plant shape, reduce female flower node, leaf color thick Green, disease resistance and cold resistance are enhanced.
4.1.3 Increase the yield During the picking period of roots, spray with 400mg/l paclobutrazol to increase yield by 26%. The four-leaf stage of autumn cucumber in greenhouse was sprayed with 100mg/l paclobutrazol solution, the internodes were shortened, the plant shape was compact, and the stems were thickened. For powdery mildew, downy mildew resistance, increased cold resistance, increased number of fruit set, increased yield by 19.4%.
4.2 Zucchini 4.2.1 Cultivate strong seedlings When 3 to 4 true leaves are used, the seedlings are sprayed with 4 mg/l to 20 mg/l of paclobutrazol to shorten the internodes, thicken the leaves, increase the green color, resist the cold and resist drought.
5. Beans and vegetables 5.1 Beans 5.1.1 In the early stage of growth, spray with 50mg/l ~ 75mg / l paclobutrazol solution to prevent the length, improve the population structure, enhance photosynthesis, increase the number of main stems by 5% ~ 10%, the pod rate increased by about 20%.
5.1.2 Increase the yield The initial flowering period is sprayed with 100mg/l liquid, and the 667 square meters can increase the yield by 217.9kg.
5.2 edamame 5.2.1 anti-canon, in the case of 5 to 6 leaves, sprayed with 50mg / l ~ 75mg / l paclobutrazol solution, stems thick, shorten the internodes, promote branching, steady growth.
5.2.2 Increase the yield from the initial flower to the full bloom period, (closed early, long-term premature medication) with 100mg / l ~ 200mg / l paclobutrazol solution, can increase effective branching, effective pod number, pod weight, Increase production by about 20%.
6, other vegetables 6.1 芋艿 1 month before the closure of the taro, with 10mg / l paclobutrazol solution rooting, each plant 100ml, can increase production by about 40%.
6.2 When the yam vine grows to the top of the rack, it is sprayed with 200mg/l paclobutrazol solution. If it grows too much, it can be sprayed once every 5~7d, and even sprayed 2~3 times to inhibit the growth of stems and leaves and promote the germination of side branches. Flower buds develop, tuber enlargement, increasing yield by about 10%.
6.3 Toon 6.3.1 Controlling the length of the plant is 40cm ~ 50cm in height, from early August to early September, spray with 300mg / l paclobutrazol solution, spray once every 10d, even spray 2 to 3 times.
6.3.2 Increase the yield and quality of shoots From the middle and late July, use 200-400 times 15% paclobutrazol wettable powder, spray once every 10~15d, even spray 2~3 times to make the plant dwarf and enhance photosynthesis. Improve the yield and quality of the shoots.
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