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|Cas No.:||76738-62-0||Other Names:||PP333|
|State:||Powder||Purity:||15%WP ， 90%TC， 95%TC|
|Application:||Plant Growth Regulator,Plant Growth Hormone,Agriculture,Agrochemicals,compact Plants By Inhibition||Classification:||Plant Growth Regulator,Agrochemical / Pesticide,Acaricide|
|Appearance:||White Powder||Storage:||Sealed Tightly And Stored Away From Light In A Cool And Dry Place,Keep In Cool And Dry Place,Dry And Shade Conditions|
|Shelf Life:||2~3 Years||Color:||White,white To Yellowish|
|Pd No.:||Plant Growth Hormone||Solubility:||Water,Soluble In Alcohol|
CAS 76738 62 0 paclobutrazol hormone,
PBZ 15%WP Plant Growth Hormone,
15%WP paclobutrazol hormone
Paclobutrazol (PBZ) is a plant growth retardant and triazole fungicide.
It is a known antagonist of the plant hormone gibberellin.
It acts by inhibiting gibberellin biosynthesis, reducing internodial growth to give stouter stems, increasing root growth, causing early
fruitset and increasing seedset in plants such as tomato and pepper.
PBZ has also been shown to reduce frost sensitivity in plants.
Moreover, paclobutrazol can be used as a chemical approach for reducing the risk of lodging in cereal crops.
PBZ is used by arborists to reduce shoot growth and has been shown to have additional positive effects on trees and shrubs.
Among those are improved resistance to drought stress, darker green leaves, higher resistance against fungi and bacteria, and
enhanced development of roots. Cambial growth, as well as shoot growth, has been shown to be reduced in some tree species.
PBZ is normally applied to the soil to be taken up by the roots and transported via the xylem to the upper parts of the plant.
Foliar application is mostly ineffective. Seeds can be soaked with PBZ to reduce seedling growth.
|Function: Plant Growth Regulator|
|Specification: 15% WP|
|High effective agrochemical|
|Oral Acute oral LD50 for male rats 2000, female rats 1300, male mice 490, female mice 1200, guinea pigs 400-600, male rabbits 840, female rabbits 940 mg/kg.
Skin and eye Acute percutaneous LD50 for rats and rabbits >1000 mg/kg. Mild skin irritant; moderate eye irritant (rabbits). Not a skin sensitiser (guinea pigs).
Inhalation LC50 (4 h) for male rats 4.79, female rats 3.13 mg/l air.
NOEL (1 y) for dogs 75 mg/kg daily; (2 y) for rats 250 mg/kg diet.
ADI (JMPR) 0.1 mg/kg b.w. .
Other Not mutagenic.
Toxicity class WHO (a.i.) III
|Mode of action Plant growth regulator taken up into the xylem through the leaves, stems, or roots, and translocated to growing sub-apical meristems. Produces more compact plants and enhances flowering and fruiting. Uses Used on fruit trees to inhibit vegetative growth and to improve fruit set; on pot-grown ornamentals and flower crops (e.g. chrysanthemums, begonias, freesias, poinsettias and bulbs) to inhibit growth; on rice to increase tillering, reduce lodging, and increase yield; on turf to retard growth; and on grass seed crops to reduce height and prevent lodging. To be applied as a foliar spray, as a soil drench, or by trunk injection. Has some fungicidal activity against mildew and rusts.Phytotoxicity Non-phytotoxic, though it intensifies greening. Some spotting has been noted on periwinkle foliage at higher temperatures.|
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