A good reference for bee toxicity can be found in the Wildlife Toxicity
section of the Farm Chemicals Handbook published by Meister Publishing
Company, Willoughby, Ohio.

Of the five fungicides Allen Dick asked about only Tatoo which contains
mancozeb is listed as moderately toxic to bees. The other four Benlate,
Bravo 500, Ronilan EG and Roval are listed as practically non-toxic. When in
doubt it it probably a good idea to contact the manufacturer of the product.


I'm told that spraying bees with water containing a surfactant or detergent
can kill bees by a chilling effect. If this is true, could this explain the
incident that Ian Farber recalled with Bravo 500 on a ginsing crop in BC?

Vic Thomas, Eastern Pennsylvania