At present, there are 5 kinds of mainstream registered brassinolide products on the market: 24-mixed epibrasinolide (about 60%-70% is 22, 23, 24-epibrasinolide, about 30%- 40% are 24-epibrasinolide), 24-epibrassinolide, 28-epihomobrasinolide, 28-homobrasinolide, 14-hydroxybrassinosterol.
At present, there is only one compound called 14-hydroxybrasinosterol, which is called natural brassinolide, which is extracted from the pollen of rapeseed flowers.
Although brassinolide has a wide range of applications, it can be used in almost all crops; from seed soaking to restoration of tree vigor after harvest, the entire crop growth process can be used; various application methods, such as seed dressing, seed soaking, drip irrigation, root drenching, leaf spraying to aerial Spraying, etc.; with comprehensive effects, convenient mixing, and a wide range of application concentrations, it is called a "panacea".
However, in these several cases, the "panacea" brassinolide must be disabled:
1. It is forbidden to mix with alkaline pesticides and chemical fertilizers
Do not mix brassinolide with alkaline fertilizers: calcium magnesium phosphate fertilizer, plant ash, ammonium bicarbonate, sodium nitrate, potassium nitrate, nitro compound fertilizer, ammonia water, etc., and do not mix with alkaline pesticides: Bordeaux mixture, lime sulfur mixture Wait, otherwise there may be injury.
2. Do not mix with herbicides
Brassinolide can relieve herbicide damage. If weeds absorb brassinolide, the herbicide effect will be reduced. It is recommended to use it at an interval of more than 7 days.
3. Do not spray brassinolide on the plots with vigorous growth
Brassinolide can promote the division of cells in plants and has the effect of promoting growth. However, if there are flourishing plots, it is necessary to control the prosperity as soon as possible instead of spraying brassinolide.
4. Do not spray brassinolide on rainy days or when there is rainfall within 6 hours
When brassinolide is sprayed on the leaves of crops, it takes a certain amount of time to be absorbed by the crops. If it rains, the rain will wash away the liquid medicine, and at the same time, it will dilute a certain concentration, resulting in a greater effect of brassinolide. Lower, so, watch the weather forecast in advance when spraying brassinolide.
5. Do not use brassinolide at high temperature
Spraying brassinolide on the leaves should not be at noon, which is when the temperature is the highest. At this time, the leaf surface evaporates quickly. First, it is not easy for crops to absorb it. At the same time, it is to prevent the high temperature from quickly evaporating water and increasing the concentration of brassinolide solution.
6. Do not use in high concentration
Brassinolide is a chemical substance with a biomimetic sterol structure. There is a certain concentration suitable for use. If the concentration is too high, it will not only cause waste, but may also inhibit crops to varying degrees.
7. Brassinolide is not a foliar fertilizer
Brassinolide is a plant growth regulator and belongs to the category of pesticides. It is not a foliar fertilizer. Brassinolide itself has no nutrition. It indirectly regulates crop growth by regulating the plant's endogenous hormone system. It has a lot to do with foliar fertilizers. Good compatibility, but brassinolide itself has no nutrients, so it is necessary to ensure the supply of nutrients, and integrate "water, fertilizer, and conditioning" so that brassinolide can play a better role in the plant.
Brassinolide classic compound formula
1. Brassinolide + pyraclostrobin
As a fungicide of methoxyacrylic acid, pyraclostrobin has the advantages of wide bactericidal spectrum, excellent effect, safety to crops and growth promotion, etc., and the compound scheme of brassinolide + pyraclostrobin has been obtained favored by a large number of growers.
Its advantages are: synergistic effect, strong quick effect; enhance disease resistance, reduce drug resistance; promote growth, reduce drug damage.
2. Brassinolide + Tebuconazole
Tebuconazole is a systemic triazole pesticide fungicide, which has three functions of protection, treatment and eradication, and has a broad bactericidal spectrum and long-lasting effect. However, tebuconazole itself has an obvious growth inhibitory effect, and if the concentration and period are not well controlled during use, it is easy to cause slow plant growth.
The scheme of brassinolide + tebuconazole can reduce the growth inhibition caused by the use of tebuconazole, and at the same time accelerate the absorption and conduction of tebuconazole by crops, so as to achieve synergistic effects and reduce phytotoxicity.
3. Brassinolide + potassium dihydrogen phosphate
Potassium dihydrogen phosphate is a high-phosphorus and high-potassium foliar fertilizer, which can provide high-quality phosphorus and potassium supply to crops. It can improve the metabolic level of crops when used with brassinolide, and promote the absorption, conduction and Conversion efficiency.
Using brassinolide + potassium dihydrogen phosphate in different periods can promote leaf photosynthesis, cold and frost resistance, drought resistance, dry and hot wind resistance, lodging resistance, promote flower bud differentiation, increase fruit setting rate, improve fruit quality and increase yield, etc. A variety of functions.
