JP3191441B2 - Method of promoting fall of flower or fruit of crop - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for accelerating the falling of flowers or fruits of crops. More specifically, the present invention relates to a method of saving fruit and fruiting effort by promoting the fall of flowers or fruits of a crop.

[0002]

BACKGROUND OF THE INVENTION It is a major challenge of agricultural technology to save fruit and harvest by promoting the fall of crop flowers or fruits. Many techniques have been devised as methods and means for this.

[0003] One method is to promote the fall of flowers and fruits by utilizing plant hormones. Ethiclosate, which shows the activity of auxin, a plant hormone, and ethephon, which shows the activity of ethylene,
In addition, denapon has been put to practical use as a fruit flattening agent for apples ("Special feature: Latest technology of planting agents""FruitJapan", Vol. 45, No. 7, 1990, pp. 18-38).

[0004]

However, the method of use and the degree of efficacy for expressing practically effective efficacy are still limited, and the development of more effective methods is not significant for agricultural production. large.

[0005] The present inventors have intensively studied the use of plant hormones in search of an effective method that is superior to conventional knowledge.

[0006]

As a result, the present inventors have found that an excellent effect can be obtained by using a combination of natural abscisic acid and ethephon in a specific method, and completed the present invention. .

That is, the present invention provides a method for promoting flower or fruit dropping of a crop, which comprises spraying natural abscisic acid and ethephon on the flower or fruit of the crop to promote falling of the flower or fruit. It is.

Hereinafter, the present invention will be described in detail.

In the present invention, natural abscisic acid ((+)-
Use 2-cis, 4-trans-abscisic acid) and ethephon (2-chloroethylphosphonic acid).

[0010] Natural abscisic acid can be produced by any method, and can be produced industrially, for example, by the method described in JP-A-63-296697 or JP-A-63-296696. Ethephon is already commonly used as a plant growth regulator.

In the method for promoting falling of flowers or fruits of the present invention, natural abscisic acid and ethephon are applied to flowers and fruits of crops. The spraying treatment is usually performed with a spraying liquid.

The abscisic acid concentration and the ethephon concentration in the spray liquid are each usually 1 to 500 ppm, preferably 10 to 500 ppm.
100 ppm.

[0013] The method of spraying natural abscisic acid and ethephon is optional, but usually, a mixed solution containing abscisic acid and ethephon is sprayed simultaneously.

In the method for accelerating the falling of flowers or fruits according to the present invention, the spray liquid is adjusted by using other plant growth regulators, auxiliary agents such as spreading agents, emulsifiers, wetting agents, dispersants, fixing agents and disintegrants. You may use together with.

[0015] Examples of the auxiliary used herein include the following. As liquid carriers, water, ethanol,
Examples include alcohols such as methanol. As the emulsifier or dispersant, a surfactant is usually used, for example, anionic surfactants such as higher alcohol sodium sulfate, stearyltrimethylammonium chloride, polyoxyethylene alkylphenyl ether, lauryl betaine, and cationic surfactants. Surfactants and zwitterionic surfactants are exemplified. In using these carriers, it is important to examine and use those most suitable for promoting the effects of natural abscisic acid and ethephon.

The crop to which the method for promoting the fall of flowers or fruits of the present invention is not particularly limited. For example, apples,
Fruits such as oysters, pears, oranges and nuts, and grains and beans such as rice and wheat are included.

[0017]

EXAMPLES The present invention will be described below with reference to examples.
The present invention is not limited to this.

Example 1 Effect of promoting fall of apple fruit At the end of physiological dropping of 15-year-old apples (cultivar: Fuji) conventionally cultivated in a field, at the time of fruit extraction, 50 ppm and 100 ppm of natural abscisic acid were used alone. Liquid and ethephon in 50 ppm and 100 ppm respectively,
300 liters were sprayed per are. 30 days after spraying, the rate of fruit drop in each section with respect to the number of fruit set at the time of spraying was examined.
Table 1 shows the results.

[0019]

[Table 1]

As is clear from Table 1, the mixture of natural abscisic acid and ethephon sprayed effectively promoted the falling of fruits.

Example 2 Effect of promoting the fall of oyster flowers Twenty days before the beginning of flowering of 20-year-old oysters (cultivar: Matsumoto early cultivation) conventionally cultivated in the field, 20 ppm and 40 ppm of natural abscisic acid alone, 20 ppm each of ethephon
, 40 ppm of a single solution and a mixed solution were sprayed at 300 liters per 10 ares. At the end of flowering, the flowering rate with respect to the number of buds sprayed was investigated. Table 2 shows the results.

[0022]

[Table 2]

As is clear from Table 2, the mixture of natural abscisic acid and ethephon sprayed effectively promoted the falling of flowers.

[0024]

According to the present invention, an excellent effect of promoting falling of flowers or fruits can be obtained. That is, by promoting the fall of the flower or the fruit of the crop, it is possible to save labor for thinning and harvesting.

Claims (1)

(57) [Claims] 1. A method for promoting the fall of flowers or fruits of a crop, comprising spraying natural abscisic acid and ethephon on the flowers or fruits of the crop to promote the fall of the flowers or fruits.