How to prevent small berries from appearing on grapes
Small grapes are formed due to seed abortion. According to observations, mature small berries have the same number of seeds as large berries, but the seeds of small berries are all at an immature stage, small and without kernels. If a berry contains 1 mature seed, the berry can be slightly larger; if it contains 2 mature seeds, the berry can grow to a medium size; if it contains...
Small grapes are formed due to seed abortion. According to observations, mature small berries have the same number of seeds as large berries, but the seeds of small berries are all at an immature stage, small and without kernels. If a berry contains 1 mature seed, the berry can be slightly larger; if it contains 2 mature seeds, the berry can grow to a medium size; if it contains 3 mature seeds, it can develop into a normal large berry.
1. Strengthen fertilizer and water management during the flowering period to ensure sufficient nutrients during the "critical period of fruit set nutrition" after the start of flowering and the "critical period of seed development nutrition."
2. From the early flowering stage to the full flowering stage of grapes, spray a 0.20% borax solution once every 7 days, for 2-3 consecutive sprays, to promote pollen tube germination and improve the fertilization rate.
3. Strengthen summer pruning. From the start of flowering to the full flowering stage, pinch the fruiting branches, and at the same time remove all lateral secondary shoots, leaving only 1 secondary shoot at the top. After 7 days, pinch the top secondary shoot again, leaving 1-2 leaves. If secondary shoots sprout again a second time, remove them promptly.
4. Manually pinch the tips of the clusters. Remove 1/5-1/4 of the flower cluster 2-3 days before flowering. This measure has an obvious effect on the Muscat Hamburg and New Muscat varieties, with a high rate of cluster formation and tight clusters with large berries.