2, artificial pollination is not needed.
Extended data:
In the Old Testament, the Israelites were described as vines (vineyards), which were brought out of Egypt, and eventually thorns spread and were destroyed.
Take out a vine from Egypt, drive away the foreigners and plant it. You prepared a place in front of the root of the tree ... why did you tear down the fence of this tree and let all passers-by pick it up? "(Psalm 80, 8- 12).
"A group of locusts, powerful and numerous, invaded my land; His teeth are like lions, and his big teeth are like lioness. He destroyed my vines, skinned my fig tree, completely peeled it and threw it away, making the branches white "(Joel 1: 6-7).
In contrast, Jesus said that he is a "real vine" and is taken care of by his farmer's father. We are countless branches. If we are still in the tree, we will bear good fruit. "I am a real vine, and my father is a cultivator. He cut off all the branches that belong to me, and they didn't bear fruit; Whoever bears fruit must be pruned to make the branches bear more fruit "(John 15: 1-2).
References:
Baidu encyclopedia-grape tree