This is only a partial measure of the harmful effects that pesticides can have on bees.
The effects of alcohol on bees have long been recognized.
Some substances which are toxic to humans have no effect on bees.
Cultivated vanilla no longer relies on bees, even in Mexico.
It has feet armed with three claws, and is parasitic on bees.
But you can have a fragrant garden that's low on bees by using night-blooming plants.
Little pollen has been seen on bees foraging female flowers.
The Soviets had conducted much dxperi- mental work on bees.
The chapter on stingless bees is an important survey of their little known biology.