How to use plant growth regulators best when growing grapes? (二)

4. Swelling

Basically all grape varieties are suitable for expansion. So whether it can expａnd depends on the variety; whether it can expａnd depends on the management level, ear size, etc. For example, a garden with extensive management level is not suitable for swelling agents. One is that the fertilizer and water can not keep up, and the swelling effect is not obvious; the other is: lack of boron, calcium, magnesium and other trace elements, and water and fertilizer can not keep up, and it is more likely to cause cracks. . At the same time, varieties with too tight ears or grape ears are not suitable for swelling, because the swelling of the fruit will increase the squeezing between the fruit, which is easy to cause cracks.

The above are a few precautions for the use of several swelling agents. In addition, the prepared swelling agent can be added with fungicides, plus foliar calcium fertilizer, and evenly dip the ears or spray the ears with a small watering can, requiring uniform and meticulous.

Problems that should be paid attention to in the treatment of swelling

(1) Due to the large number of cell divisions, large fruit particles and fast pulp growth, the uncoordinated growth of the skin and the pulp will increase the risk of cracks. Therefore, the use of calcium fertilizer must be increased. The golden finger grapes were swollen 7 days after flowering, and the stalks became severely thick and hardened. After the swelling agent is used too much, cracks and stiff fruit-like (fruit particles are not long) appear.

(2) The fruit stems will become thick, hard and brittle.

The Kyoho fruit stems of the expansion treatment become thicker. Therefore, the product that softens the fruit stems or 72% agricultural streptomycin is added during the expansion treatment, and the amount of streptomycin should not be too large.

(3) Use swelling agents for different varieties, and must increase fertilizer and water input. Under the condition of sufficient fertilization and water, the correct use of swelling agents will not affect the internal quality and taste of grapes.

5. Improve quality

(1) Use potions: Uniconazole, spraying the ears with Uniconazole 50mg/L 10-20 days before the fruit ripens can significantly increase the anthocyanin content of the grape peel, increase the soluble sugar content, and decrease the organic acid content. Increase the sugar-acid ratio and increase the vitamin C content.

(2) Use potions: S-ABA, spraying the ears with S-ABA 100mg/L solution can significantly increase the content of anthocyanins, promote fruit coloring, and can also increase the soluble solid content of the fruit and improve the flavor and quality of the fruit.

(3) Use potions: Thidiazuron (TDZ). Tidiazuron is a high-efficiency plant growth regulator. It has the effects of increasing yield, improving quality, increasing efficiency, and disease resistance when used in grape production, especially for wine grapes. , The disadvantage is that the maturity period is delayed. The appropriate concentration is 3mg/L, and the effect is good 10-15 days after flowering.

Zhengzhou Delong Chemical Co., Ltd. is a plant growth regulator production base in China, established in 2009, specializing in the production of plant protection products. If you have any questions, please feel free to contact us any time.