Many of crops have been treated with stuff that will also kill bees. Hence, the decline of bees.
How many of you out there have hand pollinated?
Some say use a Qtip. It does not work as well as a paintbrush.
I have used my paintbrush. A soft sable brush will work fine.
After pollinating, I close it up so it cannot be cross pollinated. We did this with several plants. Gourds included. It was fun.
There are time limits on when to do this. You just have to watch when the male amd female flowers open. Squash is interesting to catch. Some have a two hour time limit.
China is a beautiful place. I wish they would take more time in trying to clean it up. They need it, animals,
land and people. Some of the mountains are in the movie, "Avatar". Gorgeous.
Too much industry in many parts of the world will bring about pollution.
I have faith that one day it will all be cleaned up.