Can anyone tell me if honeybees will pollinate the following:
Cereal (Wheat, barely, and rice);
These are wind pollinated
Oil Seeds and industrial crops (sesame, sunflower, cotton and tobacco)
Sesam is manly selfpollinated http://www.seedtamilnadu.com/nsesame.htm
Cotton crop can be grown without bees. Yet there is plenty of indication that good bee activity will benefit cotton, with increased quantity and quality of crop.
Sunflower needs , at least in the case , when it is meaning to get hybride seeds.http://www.arc.agric.za/institutes/ppri/main/divisions/beekeeping/pollination/sunflower.htm
Tobacco is selfpollinating http://www.tobaccopedia.info/tobacco_seed/flowering_and_seed_development.html
Vegetables tomatoes, cucumber, watermelon, melon, onion, and garlic);
Flower of tomato needs shaking ofter that pollen come off. In greenhouses they chake plants or some use bumble bees for pollination.
Onions have plenty of nectar for bees. Same with melons.
Cucumbers some needs pollination and some not. Some cucumbers will be spoiled if it is pollinated (long green in greenhouses). Many lemons need pollination because they have "boy" flowers and "girl" flowers.
Fruits grapes, apple, apricot, peach ,pear, and pemegrout
Many fruit trees have self breeding protection and they need another variety to give pollen. Some apricot and peach are self pollinating. With cross pollination they make bigger fruits.
Legumes (chickpeas, lentils and green beans).
I think that it depends on species. Trifolium need cross pollination. It depens been if they need. I had bees near 6 hectar bean field, but there was any bees. Been species are so many.
Many plant varietes have developed to produce fruits, cucumbers etc. without pollination.
You have missed spices like (Carum carvi) caraway