Following three local methods are used in north China to prevent blossom and premature grape drop:

1. The cuticular is cut at lower part of parent branches in a circle so that photosynthesis matter gathers on the part above the cut circle of the branch during blossom period.

2. Keeping a leaf above flower heads of parent branches, cut some of the new buds above the leaf. Do not cut too much or too little.

3. Thin flower head and cut end of tassel, one week before blossom. Thin more for stronger vine while thinning less gives weaker wines. Fruit production can be increase if new bud is cut and flowers are thinned at the same time.