Grape planting technique-inflorescence elongation

In order to have higher commercial value of fruit, some grape varieties elongate the inflorescence with gibberellin in the inflorescence separation period to achieve the purpose of reducing fruit thinning and increasing ear weight, which is a technique in grape cultivation.

Today we simply learn the technique of inflorescence elongation.

Varieties suitable for elongated inflorescences, mainly European and American grapes.

Seedless varieties do seedless cultivation, such as Zuijinxiang seedless, Yihong (Yongyou 1) seedless.

A variety that bears good fruit but has a small inflorescence.

Many European and American varieties with good fruit setting are expected to reduce the workload of fruit thinning.

For various reasons, the inflorescence is less than the normal inflorescence in previous years, such as Fujiminori.

Selection of inflorescence elongating agent

Domestic gibberellin can meet the elongation of inflorescence, but its performance is not stable enough and some varieties can not achieve the expected effect in some years. As a result, most vineyards choose 20% of American Chibao.

Application time and concentration of inflorescence elongating agent

Theoretically, grapes can be used from the 6-leaf stage to the early flowering stage. In practice, the 7-8 leaf stage of most grape plantations is about 15 days before flowering (about 30 days after sprouting). At this time, the effect is the best and the cost is moderate.

The concentration of 5PPM can achieve the desired effect, that is, a pack of 20% American Qibao mixed with 80 jin (40 kg) of water. Among them, the special variety Zuijinxiang grape has 50 jin (25 kg) of water in the first year, and normal water in the second year and later.

Dip in a disposable cup or spray it slightly.

Matters needing attention of inflorescence elongating agent

Before and after the inflorescence elongation, the furrow is irrigated once.

Varieties with elongated inflorescences must preserve fruit in case the fruit falls into clusters.

Botrytis cinerea and brown blight of ear axis must be prevented after inflorescence elongation. A mixture of preventive agents such as quinoline copper in grape plantation elongation agents that do not occur during elongation. Vineyards that have already developed the disease are mixed with therapeutic agents, such as Xerox.

The elongated inflorescence needs to be careful!

Like Red Earth. Some grape plantations use inflorescence elongation to set fruit normally, while others have serious fruit drop, affecting yield or even no harvest in the whole garden.

(most of the ears after elongation of the inflorescence of Red Earth in a garden)

At present, there is basically no use of inflorescence elongation in southern red earth grape plantations.

Although there are many varieties of inflorescence elongating agents on the market, grape plantations without sufficient experience and technology, whether Eurasian or European or American, must first test a few trees and then extend them to the whole garden when the conditions are ripe, so as not to cause unnecessary losses.

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