Plant Growth Regulator
Thidiazuron
| Product Name | Thidiazuron |
| Function | Plant Growth Regulator |
| Specification | 98%Tech, 50%WP |
| Chemical Name | N-phenyl-N‘-1,2,3-thiadiazol-5-ylurea |
| CAS No. | 51707-55-2 |
| Empirical Formula | C9H8N4OS |
| Chemical Formula of Active Ingredient | |
| Toxicology | Oral Acute oral LD50 for mice >5000, rats >4000 mg/kg.
Skin and eye Acute percutaneous LD50 for rats >1000, rabbits >4000 mg/kg. Mild eye irritant; non-irritating to skin (rabbits). No skin sensitisation (guinea pigs). Inhalation LC50 (4 h) for rats >2.3 mg/l air. NOEL (90 d) for rats 200 mg/kg diet; (1 y) for dogs 100 mg/kg diet. No significant effects observed in a 2 y carcinogenicity study in mice and a 3-generation reproduction study in rats. Other Acute i.p. LD50 for rats 4200 mg/kg. Non-mutagenic. Toxicity class WHO (a.i.) U |
| Applications | Mode of action Plant growth regulator, absorbed by the leaves, which stimulates formation of an abscission layer between the plant stem and the leaf petioles, causing the dropping of entire green leaves. Uses Used for defoliation of cotton, in order to facilitate harvesting; applied at 0.21 kg/ha per season. |
| Package | 25KG/Drum, 25KG/Bag, etc |
Trinexapac-ethyl
| Product Name | Trinexapac-ethyl |
| Function | Plant Growth Regulator |
| Specification | 95%Tech, 250 g/l EC |
| Chemical Name | ethyl 4-(cyclopropylhydroxymethylene)-3,5-dioxocyclohexanecarboxylate |
| CAS No. | 95266-40-3 |
| Empirical Formula | C13H16O5 |
| Chemical Formula of Active Ingredient | |
| Toxicology | Oral Acute oral LD50 for rats 4460 mg/kg.
Skin and eye Acute percutaneous LD50 for rats >4000 mg/kg. Not irritant to skin or eyes of rabbits. Non-sensitising to skin (guinea pigs). Inhalation LC50 (48 h) for rats >5.3 mg/l. NOEL (2 y) for rats 115 mg/kg b.w. daily; (18 mo) for mice 451 mg/kg b.w. daily; (1 y) for dogs 31.6 mg/kg b.w. daily. ADI 0.316 mg/kg b.w. Toxicity class WHO (a.i.) U |
| Applications | Mode of action Plant growth regulator and retardant, which reduces stem growth by inhibition of internode elongation. Absorbed by the foliage, with translocation to the growing shoot. Uses Used for the prevention of lodging in cereals and in winter oilseed rape, at 0.1-0.3 kg/ha. Also used in turf, at 0.15-0.5 kg/ha, to reduce mowing; and as a maturation promoter in sugar cane at 0.1-0.25 kg/ha. Phytotoxicity Could cause inhibition or growth stoppage of some plants, e.g. grasses, aquatic plants and algae. |
| Package | 25KG/Drum, 200L/Drum, etc |
Paclobutrazol
| Product Name | Paclobutrazol |
| Function | Plant Growth Regulator |
| Specification | 95%Tech, 250 g/l SC, 15%WP |
| Chemical Name | (1a,2b,4aa,4bb,10b)-2,4a,7-trihydroxy-1-methyl-8-methylenegibb-3-ene-1,10-dicarboxylic acid 1,4a-lactone |
| CAS No. | 76738-62-0 |
| Empirical Formula | C15H20ClN3O |
| Chemical Formula of Active Ingredient | |
| Toxicology | 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. [1988]. Other Not mutagenic. Toxicity class WHO (a.i.) III |
| Applications | 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. |
| Package | 5L/Drum, 10KG/Carton, etc |
GA3
| Product Name | GA3 |
| Function | Plant Growth Regulator |
| Specification | 95%Tech, 20%SP, 10% Tablet |
| Chemical Name | (1a,2b,4aa,4bb,10b)-2,4a,7-trihydroxy-1-methyl-8-methylenegibb-3-ene-1,10-dicarboxylic acid 1,4a-lactone |
| CAS No. | 77-06-5 |
| Empirical Formula | C19H22O6 |
| Chemical Formula of Active Ingredient | |
| Toxicology | Oral Acute oral LD50 for rats and mice >15 000 mg/kg.
Skin and eye Acute percutaneous LD50 for rats >2000 mg/kg. Non-irritating to skin and eyes. Inhalation No ill-effect on rats subjected to 400 mg/l for 2 h/d for 21 d. NOEL (90 d) for rats and dogs >1000 mg/kg diet (6 d/w). Toxicity class WHO (a.i.) U |
| Applications | Mode of action Acts as a plant growth regulator on account of its physiological and morphological effects in extremely low concentrations. Translocated. Generally affects only the plant parts above the soil surface. Uses Has a variety of applications, e.g. to improve fruit setting of clementines and pears (especially William pears); to loosen and elongate clusters and increase berry size in grapes; to control fruit maturity by delaying development of the yellow colour in lemons; to reduce rind stain and retard rind ageing in navel oranges; to counteract the effects of cherry yellows virus diseases in sour cherries; to produce uniform seedling growth in rice; to promote elongation of winter celery crop; to induce uniform bolting and increase seed production in lettuce for seed; to break dormancy and stimulate sprouting in seed potatoes; to extend the picking season by hastening maturity in artichokes; to increase the yield in forced rhubarb; to increase the malting quality of barley; to produce brighter-coloured, firmer fruit, and to increase the size of sweet cherries; to increase yields and aid harvesting of hops; to reduce internal browning and increase yields of Italian prunes; to increase fruit set and yields of tangelos and tangerines; to improve fruit setting in blueberries; to advance flowering and increase the yield of strawberries; and also a variety of applications on ornamentals. Application rates up to 80 g/a per application, depending on desired effect. |
| Package | 25KG/Drum, 5KG/Aluminium Bag, 10KG/Carton, etc |
Ethephon
| Product Name | Ethephon |
| Function | Plant Growth Regulator |
| Specification | 85%Tech, 400 g/l SL, 300 g/l SL |
| Chemical Name | (2-chloroethyl)phosphonic acid |
| CAS No. | 16672-87-0 |
| Empirical Formula | C2H6ClO3P |
| Chemical Formula of Active Ingredient | |
| Toxicology | Oral Acute oral LD50 for rats 3030 mg/kg (tech.).
Skin and eye Acute percutaneous LD50 for rabbits 1560 mg/kg (tech.). Irritating to skin and eyes. Inhalation LC50 (4 h) for rats 4.52 mg/l (tech.). NOEL (2 y) for rats 3000 ppm diet. ADI (JMPR) 0.05 mg/kg b.w. [1997]. Toxicity class WHO (a.i.) U |
| Applications | Mode of action Plant growth regulator with systemic properties. Penetrates into the plant tissues, and is decomposed to ethylene, which affects the growth processes. Uses To promote pre-harvest ripening in apples, currants, blackberries, blueberries, cranberries, morello cherries, citrus fruit, figs, tomatoes, sugar beet and fodder beet seed crops, coffee, capsicums, etc.; to accelerate post-harvest ripening in bananas, mangoes, and citrus fruit; to facilitate harvesting by loosening of the fruit in currants, gooseberries, cherries, and apples; to increase flower bud development in young apple trees; to prevent lodging in cereals, maize, and flax; to induce flowering of Bromeliads; to stimulate lateral branching in azaleas, geraniums, and roses; to shorten the stem length in forced daffodils; to induce flowering and regulate ripening in pineapples; to accelerate boll opening in cotton; to modify sex expression in cucumbers and squash; to increase fruit setting and yield in cucumbers; to improve the sturdiness of onion seed crops; to hasten the yellowing of mature tobacco leaves; to stimulate latex flow in rubber trees, and resin flow in pine trees; to stimulate early uniform hull split in walnuts; etc. Max. application rate per season 2.18 kg/ha for cotton, 0.72 kg/ha for cereals, 1.44 kg/ha for fruit. |
| Package | 200KG/Drum, 200L/Drum, 10L/Carton etc |