Yes, plums need the correct pollinator. The right one depends on which variety you have.
Unfertilized flowers do not produce fruit. Some flowers are self-pollinating, which means that you do not need two to pollinate. These are still pollinated in order to produce fruit.
Yes, cucumber flowers need to be pollinated in order to produce fruit.
Yes. Their blossom times will overlap and both produce plenty of good pollen. However, neither need pollination in order to bear fruit; the fruit will just end up seedless.
No, taking out the anther won't make a flower convert into a fruit. In order to pollinate and fertilize the ovules (eggs) inside the flower's ovary, pollen must be produced and released by the reproductive organ known as the anther. A flower cannot turn into a fruit without effective fertilization and pollination.
That is simply the variety of fruit that they produce in order to facilitate spreading of seeds.
The Black Tartarian cherry tree needs to be pollinated by another cherry variety (Bing or another sweet cherry variety will do) in order to properly develop its fruit. Although the fruit can not develop without the tree having flowered first, flowering alone does not guarantee that the tree will set fruit.
Most Kiwi plants require a male and a female plant in order to produce fruit. Very difficult to tell a male from a female Kiwi plant.
No, cicadas do not function as pollinators. As members of the True Bug order Hemiptera, the Cicada has piercing and sucking mouthparts. They primarially pierce the twigs of bushes and tress and then feed on the sap within. Since they are not attracted to flowers there is no way for them to intentionally or unintentionally pollinate anything.
Pear trees need full sun, which is typically defined as at least 6 hours of direct sunlight per day, in order to thrive and produce fruit.
Actually, in order to stimulate fruit growth you can strike your tree or you can have another fruit sit on top of your tree and that should stimulate growth in your "fruit".
It depends on the type of apple tree, some are self pollinating and some need other trees pollen in order to pollinate.
It depends on the variety. Many varieties of fruit tree are self-sterile, meaning that they cannot pollinate with themselves. Due to grafting, if you buy two trees of the same variety, they are genetically identical- basically they are the same tree. So, you need a different variety of the same fruit in order for cross pollination to occur. Some trees are more genetically compatible for cross pollination, which is why in nursery catalogs, different trees are said to be good pollinators. Commercial orchards often plant crab-apple trees in with the apples to ensure good pollination.