2010-11-30

GA, PCPA can not be mixed pesticide

First, GA

1, physical and chemical properties. Industrial is a white crystalline powder, insoluble in water, benzene, nitrogen, soluble in methanol, ethanol, acetone and pH 6.2 phosphate buffer. In dry conditions, difficult to break down, the above solution at 5 ℃, easily damaged and fail. In case of alkali decomposition.

2, preparation. 85% of the original powder, 4% of the EC.

3, application and use. GA is highly effective growth-stimulating agent, is a exogenous GA, the seeds, leaves, tender plants, flowers and fruits into the plants, endogenous GA from the same physiological function. . Can promote plant cell growth, accelerated growth, early maturity, increased yields; breaking seed dormancy and promote germination; change the ratio of male and female flowers, affecting flowering time and reduce the falling drop, a MET, an antagonist of CCC and other growth inhibitors. For grain, cotton, fruit trees, vegetables and other crops. ⑴ grapes, in 7-10 days after flowering, when the spraying began to grow ear young fruit, seedless purple grapes spray 200 mg / kg of liquid, Kyoho, Muscat grapes sprayed 200-400 mg / kg of liquid, can increase the Block fruit rate, increased fruit yield significantly. Never before in the flower or flower use. ⑵ watermelon, 2 leaves a heart of, spray 5 mg / kg of liquid 1-2 times, can induce female flowers. ⑶ cucumber, a leaf sprayed with 50-100 mg / kg of liquid 1-2 times, can induce female flowers. ⑷ potato, with 20 mg / kg of potato seedling root dip Ministry of liquid for 10 minutes, immediately planting, can increase production.. ⑸ potatoes, with 0.5-1 mg / kg of liquid dip tubers for 10 minutes, remove and dry sowing, seedling emergence of spring potato can make early and homogeneous, the Summer dormant buds can promote germination of seed. Concentration of the soaking time is too long or too large, will produce inhibition. ⑹ strawberries, 2 weeks before flower bud, spray 20-50 mg / kg of liquid 2 times, at intervals of 5 days, can stalk elongation, early flowering.

4 Notes. GA insoluble in water, alcohol use should be preceded by a small amount of dissolved, dilute with water to the desired concentration of solution does not keep. Gibberellins stimulate growth when used to promote fruit, water and fertilizer to keep up in order to increase production to play its role.

Second, PCPA

1, physical and chemical properties. Slightly pungent smell of the original powder is white crystal, can dissolve in water and most organic solvents.

2, preparation. Original powder, 10% EC.

3, application and use. PCPA is a plant growth regulator. Crops can effectively inhibit the formation of abscisic acid in vivo, resulting in not easy to produce stalk separation between the layers, to prevent the falling fruit drop and improve fruit set, and promote development of young fruit, early maturity, for melon and fruit. ⑴ fruit trees, apple trees in bloom, the young fruit growing season, and harvest fruit drop of 1 month before, the spray 1 25-35 mg / kg of liquid. Grapes in the flowering spray of 30 mg / kg, can improve fruit set. ⑵ tomato and eggplant, in the flowering spraying 25-3O mg / kg of liquid, sprayed in the take, to avoid the spray on the leaves. ⑶ pepper in the flower of flowers spraying 20 mg / kg of liquid, to protecting flowers and fruits.

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