Appearance: White power
Molecule Formular: C28H46O6
Molecular weight: 480. 68
Melting point: 274centigrade
Solubility(20-25centigrade): Solubility in water: 5mg/l;
Easily soluble in methanol, alcohol.
Toxicology
Poisoning symptoms: No report about human poisoning.
First aid: No specific antidote known. Treat symptoms.
Toxicological data:
Acute oral in rat: LD50>5000mg/kg
Acute dermal in rat: LD50>5000mg/kg
Application
Natural Brassinolide is a steroidal plant growth regulator.
Its function includes:
1. Promote the growth of plant to increase yield.
2. Raise the ratio of fruit bearing and increase the unit weight.
3. Enhance the resistance of the plant to drought and cold weather.
4.Enhance the immunity of the plant. Used in tissue culture,
regulate the differentiation of the tissue.
Promote the growth of crop, increase the yield and improve the quality.
Enhance the resistance.
Applicable Plant
Field Crop: wheat, rice, corn, bean, cotton
Vegetable and fruit: cucumber, tomato, chilli, celery, eggplant, strawberry,
and so on.
Fruit trees: grape, orange, sugarcane, sugar orange and so on.
²spraying 0.01% brassinolide, 1000~2000 times diluent during the early flowering of wheat, using 1000 times diluent canbe increased more than 7% yield. 1500times can be increased 6.49%.
²soaking seed or rice seedling bed period, using BR can make rice seedling strong, increase yield about 12%, the range 7.4%-21.5%.
²Using 0.01% BR SL 300ML per hectare in tillering stage，early earing stage and full heading stage each time, can be inceased yield 9.65%-16.56%. Meanwhile it can shorten heading period, increase cold, wind and dew resistance. It’s safe for rice.
²Using 0.004% BR SL 1500times diluent soaking seed 24 hours before sowing the seeds. Take out and airing, then sow. This can increase seed germination, increase the length of root and single plant raw weight, can also enhance the cold resistance of seedling.
²Before tasseling stage, 0.04% SL 1.25-2.5ML or 0.01% EC 10-20mg per 0.07ha, add 50kg water, spray whole plant, can enhance photosynthesis, reduce ear bald and increase kernels per spike.
²Increase leaf chlorophyll content, promote dry matter accumulation and growth of cotton.
²In the season of much rain, less sunshine etc. It can still help plant to keep high photosynthesis and leaf growth, enhance the resistance
²Increase boll stem number and boll weight, enhance cotton fibre and cotton seed enrichment degree, increase ginned cotton 4.25%-10.57% in normal year.
²Form trefoil stage or squaring stage, spray 0.05-0.1mg/kg BR one time every half a month. Continue use 2-3 times will be better.
²1 soybean.
²Using 0.15% EC 10000 times diluent spraying on stem leaf can enhance lodging-resistance, reduce blighted grain, increase yield.
²2 peanut.
²Using0.15%EC 7500-10000times diluent or 0.0002%soluble powder 40times diluent brassinolide in peanut needle under period can increase 10% yield.
²3. sesame
²If late sow the seed, poor soil, drought or less fertilizer, close and grow weakly, brassinolide can be used to promote the growth.
²4. oilseed rape
²Spray brassinolide one time in squaring period and flowering period, can increase more than 10% yield.
²1.leaf vegetables
²Spraying leaf during seedling stage, can promote growth, increase the amount of leaves; Same method of harvest stage can prolong the harvest time, reduce coarse fibre content, improve taste. Spraying 2-3 times during seedling and growth period of leaf vegetable, can enlarge the leaves and can be increase 3.6%-10.1% yield.
²2 root vegetable（potato, garlic, onion, radish etc. ）
²Using 2-3 times during growing period, can enhance the resistance of disease and obviously increase the yield.
²3. melon and fruit vegetable.
²Using 0.1mg/L BR during flowering and increase fruit period of tomato can increase weight, resist low temperature, and resist disease. Using BR in seedling stage of cucumber can resist 7-10°C night lower temperature. Keeping spraying 2 times during flowering and fruit period of pepper can be increase 7.86%-14.8% yield.
²Spraying BR 0.01% EC 3000 times diluent before apple tree flowering and after flower fade, seedling and fruit swelling period each time, the apple tree stable and strong, no vain growth phenomenon, no side –effect and can be mixed with pesticide. It was found that the leaf thickness increased 22.6%, green and luster, also enhance resistance after treatment by BR. Increase fruit setting rate about 20%, soluble solid content 3.4% and yield 13.1%. Good at fruit shape, color and luster.
Spray brassinolide during flowering period and the first physiological drop, can obviously increase the fruit setting rate 4.5%-5.2% and also increase the sweet of navel orange. Increase the yield, improve the quality.
²Tobacco
no pesticide injury. Promote growth and have control effect of mosaic disease. The effect rate can be more than 70%.
²Adding appropriate BR solution in culture during making inclining bacterial strains of Oyster mushroom and liquid strains, can promote growth of mycelium, shorten the period of strains culture, increase the yield, prolong the shelf life of strains etc.
²Spraying BR during planting aloe can increase leaf length 2.3%-9.9%, blade width 24.3%-35.9%, thichness 72.2%-83.3%, in order to increase the yield and improve the quality.
2.1 resist the cold
²BR can reduce injury of plant seedling during cold stress period, promote growth of the root and basal leaf and make them strong.
²Biological membrane have protection effect after treating by BR. The seedling of tomato, eggplant and cucumber can be normal expand during cold environment after using BR.
²Soaking seed, using BR, growth one month in 15-18°C, the length of leaf increase 11%-16% compare to matched group. Spraying BR can increase setting percentage 40.1% of rice during cold weather.
2.2 resist drought
²Brassinolide can enhance water use efficiency and photosynthetic rate of plant, still have photosynthesis when drought, in order to enhance resisting drought.
²Using BR can increase water potential of leaf, reduce water requirement and transpiration rate, improve the water of plant cell. In order to resist drought. The MOA national fertilizer station have a trail in Hebei province, they found BR can reduce the wilting degree of peanut in drought condition, enhance the resist drought of peanut.
²Photosynthetic rate is the symbol of crop metabolic level. Increase photosynthetic rate can enhance resistance of adversity conditions.
2.3 resist disease
²Plants often encounter some harms of biological factors during natural growth and development, result in disease even death. But brassinolide can enhance the resistance of disease. Japanese found brassinolide can enhance resisting disease of rice blast, rice sheath blight, grey mold of cucumber, fire blight of tomato, soft rot of cabbage. Our MOA national earth fertilizer station found that the disease of wheat ,tobacco, peanut of some areas were obvious alleviated after using BR. Such as powdery mildew, rust disease, gibberellic disease and rosette stunt of wheat; leaf spot, rust of tobacco; leaf spot of peanut; grey mold of strawberry; seedling blight of cotton, cotton boll rot disease and anthracnose.
2.4 alleviate the disease of pesticide;
²Brassinolide can promote root activity, reduce plant transpiration, reduce absorb of pesticide and inhibition effect of photosynthesis, in order to alleviate the disease of pesticide.
²Remove and reduce the injury of herbicide or pesticide(like butachlor) by using BR. Can reduce the injury of simazine, butachlor, pretilachlor in rice and simazine in wheat.
3.Reduce the pesticide residue in crops.
²The residues of pesticide is not always in plant body after absorbing by plant, but digest by itself slowly. When the content of BR become higher in plant body, lots of degrading pesticide gene(P450,GST) will become active. This gene can help plant to synthesis protease, in order to invert pesticide to soluble matters or low toxicity, discharge out of body.
²After spraying BR, the residue is reduced 30%-70% compare to none spraying crop when harvest.
