Grape Seedless Fruit Production (Seedless)
隐藏域元素占位
Grape Seedless Fruit Production (Seedless)
Application of Regulators in Seedless Grape Production
Gibberellic acid
50-200 mg/L gibberellic acid was used to soak the ear of grapes once 14 days before and 10 days after flowering, respectively, which could improve the fruit fruiting rate or form seedless fruits. The method of dipping the plastic cups one by one is commonly used, the artificial flower ear dipping method is used for pre-flowering treatment, and the shower spray is performed on the flower ear with a manual sprayer after flowering.You should choose to avoid the time period when the temperature is higher than 30 ℃ before 12:00 am or after 3:00 pm on sunny days and before sunset. The relative humidity is around 80% and can be maintained for 2 d. Dry weather is easy to cause phytotoxicity, and the treatment effect is not good in cloudy and rainy days. This weather should be avoided when operating in the field.If there is light rain after 8 hours of treatment, the treatment can no longer be carried out. If the rainfall is heavy and the scouring is strong, it needs to be carried out again. In Turpan, Xinjiang, the secondary and tertiary inflorescences on the "seedless white" grapes fell off very seriously. After using gibberellic acid, the yield of fresh grapes can be increased by 74%, and the raisins can also be increased by 50.3%. "Rose Dew" grapes contain more seeds. After using gibberellic acid, gibberellic acid makes the development speed of grape pollen and embryo sac inconsistent, thus forming seedless fruit.
According to the test, the use of gibberellic acid "rose dew" grapes can make the seedless rate of about 95%. The use of gibberellic acid is suitable for "seedless white" and "rose dew" grape varieties. Usually, 100 mg/L gibberellic acid solution is used to soak the flower ears about 14 days before full bloom, and a little vibration is used to make it fully drugged and pollen. Loss of germination power, but easy to make the fruit smaller.Therefore, about 9 days after full bloom, the ear was soaked with gibberellic acid 100 mg/L once again. In large grape-producing areas, gibberellic acid 100-200 mg/L can be sprayed about 12 days after the beginning of full bloom. Pay attention to spraying on the inflorescence, not on the leaves.
It should be noted that gibberellic acid is only suitable for some grape varieties. "Kyoho" grapes cannot play this role, but will form small fruits and green fruits, which will affect the edible value. Therefore, whether other grape varieties can adapt to the needs depends on the experimental basis. Carried on;Gibberellic acid also has the effect of improving seedless fruit setting on other European seedless cultivars and cultivars whose seeds are easily aborted and shattered, but low concentration (<20 mg/L) gibberellic acid can promote the growth of new shoots instead Promoting fruit shedding, especially spraying in full bloom can cause yield reduction.
Gibberellic acid and streptomycin
Treatment with 100 mg/L streptomycin + 20~100 mg/L gibberellic acid once from 12 days before flowering to early flowering, and once again with 50~100 mg/L gibberellic acid 10~15 days after flowering to promote no The nuclear effect is obvious.
Gibberellic acid·Forchlorfenuron
"Red Earth" grapes were applied with 25 mg/L gibberellic acid 7 days before flowering, and 25 mg/L gibberellic acid combined with 5 mg/L chlorfenuron 14 days after flowering, which could make the seed-free rate reach 98.1%.
Gibberellic acid and 4-CPA
Inducing "Kyoho" fruit seedless, the effect of single treatment with gibberellic acid or p-chlorophenoxyacetic acid is not ideal, the seedless rate is less than 90%, and the phytotoxicity is relatively serious, and 10~20 mg / L The gibberellic acid solution was added with 15 mg/L p-chlorophenoxyacetic acid solution, and the flower ears were dipped 5 days before flowering. The seedless rate could be as high as 97.1%~99%, the phytotoxicity was reduced, the fruit was stable, and the pulp developed well. 25 mg/L gibberellic acid solution was treated once again 10-14 d after flowering, the fruit size increased significantly, and the ripening period was 10-15 d earlier, and the economic benefit was obvious.
Attention should be paid to the use: it should be used in strict accordance with the prescribed concentration, otherwise it is easy to cause phytotoxicity. When dispensing, use a small amount of hot water to fully dissolve the powder, and then add a sufficient amount of water according to the concentration used. This agent cannot be mixed with alkaline fertilizers and pesticides.
Previous ：
Growth Stage Products
Related Products
Get A Quote
Email:info@pandustry.com
WhatsApp：+86-15729389816
Tel.:+86-371-60383117
Add: 3F, Building No.9, National University Technology Zone(East), Zhengzhou , Henan, China
Leave a Message
Demand for agrochemical products or crops