Greetings All.
In November 2000, I was asked by Elliot Chemicals Ltd. to test four
spray adjuvants on honey bees. The adjuvants were Du-Wett, Li-700, Bond,
and Bond Xtra. Three different concentrations were applied directly, or
were fed to bees in cages, and all tests were replicated three times,
and results were compared with dimethoate and distilled water. The
concentrations tested were well above those used in the field. Testing
procedures were those of the OECD Guidlines for the Testing of Chemicals
of 21 September 1998.
Despite some mortality for two of the three cages of Bond Xtra at 1%
when applied topically, none of the adjuvants were found to be toxic to
honey bees at any concentration tested. Of course the test conditions
differed from field conditions, but because the concentrations tested
were above those used in the field, there is a strong implication that
these materials themselves would not be toxic to honey bees in the
field.
Donovan, B. J. and Elliot, G. S. 2001: Honey bee response to high
concentrations of some new spray adjuvants. New Zealand Plant Protection
54: 51-55.
Donovan, B. J. 2001: Laboratory tests show that some new spray
adjuvants are benign to honey bes. The Orchardist 74, 5: 38-39.
Regards,
Barry Donovan
Canterbury Agriculture and Science Centre,
Lincoln,
New Zealand.
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