Application of Regulators for Grape Shoot Growth Inhibition

Chlormequat Chloride CCC

In the early stage of new shoot growth, before the grapes bloom, spray with 100~1000 mg/L liquid medicine, which has obvious inhibitory effect on the growth of new shoots of grapes. Generally, the growth amount can be reduced by 1/3~2/3 compared with the control. Growth is also somewhat controlled.For varieties such as "Rose Fragrance", "Little White Rose Block" and "Riesling", 100-400 mg/L of Chymetropin can be sprayed. For "Kyoho" grapes, it is required to spray 500-800 mg/L of Chromium at the early flowering stage. 1 or 2 times (interval of 10 d), long-term spraying of 1000 mg/L chloroquine for the “Red Earth” grapes in the greenhouse before flowering, and 1500 mg/L before flowering for the “Xiahei” varieties in the open air Chlormetrodin solution or spraying 1000 mg/chameleon solution in young fruit stage can significantly reduce the length of branches and internodes, and at the same time increase the grape ear weight, single grain weight and chlorophyll content.

Note that when the grapes are sprayed with chameleon to control the shoots, the effect increases with the increase of the concentration, but when the concentration is higher than 1000 mg/L, the leaf edges will turn green and yellow;When the concentration exceeds 1000 mg/L, the edges of the leaves will turn green and yellow; when the concentration exceeds 3000 mg/L, the long-term damage is not easy to recover.Therefore, the spraying concentration of chlorophyll should be controlled in grapes; the control effect of chlorophyll on the use of chlorophyll is inconsistent among grape varieties, so it is necessary to control the shoots by mastering the appropriate concentration according to local varieties and natural conditions.
Mepiquat chloride

For the long-term growth of new shoots (when shoots are less than 7.5 cm), spraying wine with 250-750 mg/L mepinium liquid on the leaves can effectively control the growth of new shoots and promote fruit setting.However, when the concentration is too high, it is easy to cause yellowing of the leaf margins, which affects photosynthesis. In actual production, it can be compounded with diethyl aminoethyl hexanoate to prevent side effects. In the "Rose Fragrance" grape variety, it is necessary to manually pinch After the shoots, in the early flowering stage or full flowering stage, spraying with 50-100 mg/L mepinium liquid can slow down the growth rate of accessory shoots, promote the rounding of fruit grains, the compact ear grains, and improve the fruit set rate.

Uniconazole

10 d and 20 d before fruit ripening, spraying with 50-100 mg/L niconazole liquid on the ears of two grape varieties "Jingya" and "Xiyanghong" can significantly increase the anthocyanin content of grape peels. Increase the soluble sugar content, decrease the organic acid content, increase the sugar-acid ratio, and increase the vitamin C content. It has the effect of promoting the coloring of grape fruit and improving the quality of the fruit.

Paclobutrazol

Soil application: Before the germination of "Kyoho", apply 6~10g of 15%% paclobutrazol to each grape (the active ingredient is 0.9~1.5g), and rak the soil after application to make the medicine evenly distributed in the 15 cm deep soil layer.1 to 4 nodes after application, the length of the internodes was not inhibited. After 4 nodes, the internodes became significantly shorter. Compared with the control, the annual shoot length was 67% for 6g, 60% for 8g, and 52% for 10g.Foliar spraying: spray paclobutrazol once 7 days after flowering, the effective dose is 1000~2000 mg/L, the annual growth of new shoots is only 60~80cm, which is about 60% of the control, and it is a moderate and robust fruiting branch. And in the second year, the flower spike was 1.6-1.78 times that of the control.Foliar spraying should be done in the early stage of the growth of grape shoots (usually at the end of grape flowering), and the inhibitory effect on the growth of new shoots is not obvious if it is too late.

Attention should be paid to the use: the use of the control agent should be based on the application time. The spraying effect is best when the length of the axillary bud is 1-5 cm, and it will be invalid if the length exceeds 10 cm. In addition, for the same strain, such as "Xiahei", the dosage of shoot-controlling agents has a great relationship with the grape growing period, and has little difference with the climatic conditions in the north and south.
Fosamine-ammonium

When the grapes are in full bloom, spraying 600 mg/L regulating phosphine can control the vegetative growth of "Rose Fragrance" grapes, improve yield and quality, enhance tree vigor, promote photosynthesis, and improve fruit setting rate. The physiological effect of regulating phosphorus is obviously enhanced with the increase of application concentration, but the highest concentration should not exceed 1500 mg/L to prevent phytotoxicity.

Daminozide B9

After testing on two grape varieties "Kyoho" and "Zaosheng Gaomo", foliar spraying with 1000-2000 mg/L butyryl hydrazide solution after full bloom (when the new shoots are 6-7 cm) can inhibit the main effect. The growth of shoots and auxiliary shoots can also increase the weight of single fruit and plant yield, and mature earlier. The use of butyrate hydrazide can shorten the internodes of grape growing branches, deepen the leaf color, the leaves are small and thick, and the chlorophyll increases.Butyrin hydrazide does not control the growth of new shoots as strongly as chlormethalin, and at the same time, the production time of the effect of inhibiting shoots is also relatively slow.According to the test, the treatment effect of butyryzide 200 mg/L for "Rose Fragrance" grapes is better, and for "Kyoho" and "Kangke" grapes, it should be increased to 2000-3000 mg/L.The spraying time of butyric hydrazide is 7~10d earlier than that of chameleon, and the spraying concentration is 2000~3000 mg/L. The spraying concentration is determined according to the grape variety, and the local variety should be tested before popularization.

Prohexadione calcium

Spraying the new shoots with 250-500 mg/L prohexadione calcium solution before flowering can inhibit the vigorous growth of new shoots, shorten the internode distance, and increase the number of leaves and branch thickness. If the concentration is higher than 600 mg/L, some varieties will have phytotoxicity.