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How to strengthen management during the flowering period of greenhouse grapes? These key points must be done well
1. Pinch off the growing tips at the right time. Greenhouse grapes should be trained with a trellis system, and heavy pinching should be done early to control excessive growth. When the main vine grows to 60-80 cm, remove the terminal secondary shoot but keep the winter bud, and pinch all other secondary shoots leaving 1 leaf. After 25 days, when the terminal winter bud sprouts and grows 6-7 leaves, pinch leaving 5 leaves, and remove the terminal secondary shoot but keep the winter bud; after the winter bud sprouts again...
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How to prevent and control white rot of grapes during the rainy weather of the ripening period
White rot is one of the major diseases of grapes, especially in old vineyards where continuous rainy weather when the grapes are about to ripen leads to severe infection, often causing considerable losses. Grape white rot generally begins to develop in mid-to-late July, mainly harming the fruit clusters and new shoots, and the fruit is more susceptible once it enters the ripening stage. When fruit clusters are infected, it mostly occurs...
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Grape disease and pest prevention: using these three sprayings well is the key
1. Peeling. In early spring, first lay a layer of plastic film under the grapevines, then peel the bark off the canes and let it fall onto the film; at the same time cut off diseased and pest-infested branches, gather them together with the bark scraps on the film and burn them outside the vineyard. 2. Deep plowing. Along with applying the grape bud-break fertilizer, carry out one deep plowing of the whole vineyard, with a depth of 2...
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How to care for grapes during the flowering and fruiting period? Master these key points
1. Strengthen fertilizer and water management. In production, fertilizer and water management must be carried out according to the phenological stages of grape growth and development. In addition to deep plowing, fertilizing and improving the soil when planting grapes, fertilization and irrigation should also be carried out at each growth stage according to the needs of grape growth and development. 1. After the grapevines are uncovered...
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Detailed Explanation of Grape Inflorescence Thinning Methods and Key Technical Points
The main flowering-period diseases of grapes such as Summer Black and Red Globe are gray mold and rachis brown blight, both of which are fungal diseases. Gray mold, also known as bunch rot, has occurred rather severely in recent years; in severely affected orchards it can destroy more than 70% of flower clusters, mainly damaging the corolla, pedicels, rachis, and newly set fruit after pollination during the pre-bloom and blooming periods...
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Two Techniques for Thinning Grape Inflorescences
A grape inflorescence may contain 300-1500 flowers, and most of the flowers and berries will drop during fruit set. Therefore, thinning the inflorescences retained on the fruiting canes can strengthen the development of the remaining flowers. 1. Removing inflorescences. This refers to removing the entire inflorescence from the fruiting cane. When the vine has a heavy crop load and too many inflorescences, it is necessary to...
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Detailed Explanation of the Technical Points of a New Method for Green Branch Grafting of Grapes
Green branch grafting of grapes is a good method for rapid seedling propagation and for top-working old vines for renewal. The grafting time is in the slack farming season after summer sowing. Using lignified green branches, the grafting survival rate can reach over 95%. Each person can graft 500 to 800 seedlings per day. The new shoots that sprout after grafting can lignify before autumn, can overwinter safely, the graft union heals well, and the seedling quality...
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How to scientifically apply potassium fertilizer during the middle and late stages of grape growth
Potassium fertilizer is very important throughout the entire growth period of grapes, especially during fruit development when the demand is even greater. Therefore, grapes are known as a "potassium" crop. Potassium fertilizer can promote grape fruit enlargement and ripening, improve variety quality and storage tolerance, promote branch thickening and maturation, and enhance their cold resistance, drought resistance, high...
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The best time, purpose and methods for thinning grape flower clusters explained
Pinching the tips of grape flower clusters: grape vines produce many flower clusters, which easily consume a large amount of nutrients and reduce the fruit set rate. Pinching off the tips of the flower clusters can reduce the number of flowers, lessen competition for nutrients, and increase the fruit set rate. The best time for pinching the tips is one week before flowering, and it should be finished by the time flowering begins. First pinch off the secondary clusters, then pinch off 4-5 lateral branches on the main axis, leaving...
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When grape thinning of flowers and fruit is done well, the yield is naturally high
First, pay attention to strengthening the management of fertilizer and water; second, keep the damaged leaves on the plant appropriately for a period of time. It takes about one month for new lateral branches to grow. The leaves of the new lateral branches can replace the diseased leaves in photosynthesis, alleviating the phytotoxicity. After spraying grapes, observe in the orchard at any time, and if abnormal patches and plants are found...
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