You always wanted to know what pollinated rambutan, litchi, blueberries and all those other plants dependent on insect pollen movement?  O yes, and also what is pollinating avocado?

Insect Pollination Of Cultivated Crop Plants

by S.E. McGregor, USDA

Originally published 1976

The First and Only Virtual Beekeeping Book Updated Continuously.

Additions listed by crop and date.

This book is out-of-print, but can be found on-line at ABE Books and then you can get the images that are missing from the online version of the book

https://www.abebooks.com/servlet/SearchResults?sts=t&an=&tn=insect+pollination+of+cultivated+crop+plants&kn=&isbn=&n=100121503

https://www.ars.usda.gov/ARSUserFiles/20220500/OnlinePollinationHandbook.pdf

This is an old book with a lot of old information, but a lot of it is still good.  There is definitely more up-to-date information, but this is a good starting point.  For avocado, another good source, or course is AvocadoSource which also has quite a number of articles on pollination of other tree species

http://www.avocadosource.com/search.asp

Recently a group of UC Riverside researchers met to align themselves around the topic of pollination - The biology, effects, interactions of the various pollinator and pollinizers and how they are affected by our environment and how we might be able to manage them better.  The participants in this pollination group have all manner of expertise and hopefully their interaction will bring a synergy of understanding to this very complicated subject.

Photos:  Syrphid (hover) fly, bumblebee, honeybee, thrips carrying pollen