Promoting fruit setting, swelling, and increasing yield has always been one of the main applications of regulators. Since the beginning of research on plant regulators in China, such applications have been accounting for a considerable proportion.

From the prevention of falling flowers in tomato and eggplant, the prevention of fruit drop in apples, the expansion of grape fruit, and the application of inhibitors to promote the seed setting rate, we have applied indole acetic acid, 2,4-D, naphthaleneacetic acid, gibberellin, Cytokinins, longer-term inhibitors and other inhibitors to promote fruit set, fruit, and achieve the purpose of increasing production and improving quality. However, when a certain agent is used alone, the side effect is often increased, and side effects such as hollow fruit, cracked fruit, and fruit stem are hardened. If the quality is not met, two or more plant growth regulators are required to be mixed. However, the compounded products must undergo scientific tests, and the effective ingredients and contents of the compounded products should be strictly screened. Otherwise, the speed will not reach or even cause side effects. 

Here are some commonly used compound preparations.

 (1) Sodium nitrophenolate + sodium α-naphthylacetate 

The preparation is generally a water agent or a soluble powder, which is composed of high-purity α-naphthylacetate and sodium nitrophenolate. The common 2.85% water agent on the market. (1.8:1.05), these two components can synergize with each other, broaden the effect of the drug, reduce the concentration of use, not only the effect of sodium nitrophenolate activator, but also the effect of sodium-naphthyl acetate sodium rooting and fruiting. A broad-spectrum plant growth regulator has become a relatively wide variety of plant growth regulators due to its rapid formulation and excellent flower-preserving properties.

(2) Gibberellin (GA4+7) + 6-BA 

The preparation is generally an emulsifiable concentrate, a solution or a spreader. Market products have 3.6%, 3.8% emulsifiable concentrate, 3.6% liquid, and 2.7% cream. It can be absorbed by the stems, leaves and flowers of plants, and then transmitted to the active parts of the meristems, promoting fruit setting, promoting the five-sided protrusion of apples, and gaining weight. This mixture has been applied to the Red Star, New Red Star, Short Red Star, Red Fuji and Green Banana apples of the Marshal Department. It is usually sprayed once during the flowering period, and sprayed once again for 15-20 days. In addition, it can also be applied to fruit trees such as kiwi, grapes, and bananas.

(3) Choline chloride + naphthaleneacetic acid (sodium) 

The preparation is generally a soluble powder or a liquid. The market products have 25% water agent, which is mainly used in tuber and tuber crops such as potato, sweet potato, radish, onion and ginseng. This formula is a type of promoter, which inhibits the photorespiration of C3 plants, improves photosynthesis efficiency, promotes the transport of organic matter, and transports photosynthetic products to roots and tubers as much as possible, increasing the yield of roots and tubers.

(4) Gibberellin (GA3) + CPPU 

The preparation is generally an emulsifiable concentrate or a solvable solution. It is an upgraded product of 0.1% clopidogrel solution, and the effect of adding gibberellin is to prevent side effects such as cob hardening and juvenile fruit size. Generally, the concentration of gibberellin is 10 ppm, and the chlorpyrifos is adjusted according to the treatment crop, and the use range is 5-20 ppm. For example, if the mixture is applied to Kyoho grapes, it is best to use the concentration of gibberellin 10ppm+CPPU5ppm, which not only improves the fruit setting rate, but also promotes the expansion of the young fruit and the weight of the single fruit is significantly increased.

(5) Gibberellin (GA3) + (type) auxin 

The preparation thereof is generally a solution or a soluble powder. When auxin, such as α-naphthylacetic acid, 2,4-D, p-chlorophenoxyacetic acid, β-naphthyloxyacetic acid, etc., is applied in crops such as tomatoes, mangoes, pineapples, and bananas, the fruit set rate is increased while also producing certain The amount of empty fruit, if used in combination with gibberellin, greatly reduces the proportion of empty fruit and significantly improves the quality.

Next method about Formulation for promoting fruit setting and fruit expansion, focus on next paper. And any question, contact us any time.