Posted by borderglider on July 4, 2008
Dr Maryann Frazier’s team has been studying 92 CCD colonies from all over the USA. They examined pollen, brood and wax samples from the hives and analysed them for a very wide range of insecticides, herbicides and fungicides.
They found an alarming total of 46 different pesticides in the affected colonies.
Nurse bees feeding larvae in my hives – July 4th 2008
In one single hive they found seventeen different pesticides.
The average number of pesticides they found per hive was five
Of 108 pollen samples analysed – only three did not contain pesticides.
CONCERN OVER FLUVALINATES (Bayvarol & Apistan strips)
The team found high levels of fluvalinate in wax samples from the CCD affected hives; in some case the levels of contamination were so high that they were close to the LD50 level for bees (the dosage at which 50% of exposed bees would die). The team also point out that the modern forumulation of ‘Tau-fluvalinate’ is more than twice as toxic as the original licensed product; moreover they detected an ‘amplification’ effect when a particular fungicide was present along with fluvalinate – which increased the toxicity by almost ‘one thousand times’.
“As found in pollen, fluvalinate, coumaphos and chlorpyrifos were the most
commonly detected pesticides with fluvali-nate and coumaphos being detected in 100% of the samples. survival. In addition, Piperonyl butoxide (PBO) (a pesticide synergist often added to formulations of pyrethroids to increase their potency) can be found in frequent use around urban apiaries. With or without the addition of PBO or other adjuvants, fluvalinate is now considered to be a highly toxic material to honey bees. Based on its prevalence in wax, wide-spread resistance in varroa and its toxicity to honey bees, fluvalinate appears to have outlived is usefulness.”
FULL ARTICLE BY MARYANN FRAZIER OF PENN STATE UNIVERSITY
WHAT HAVE PESTICIDES GOT TO DO WITH CCD? (download PDF document)
View or download the article (pdf file) by clicking on the link above.
Posted in BEEKEEPING, PESTICIDES | Tagged: BEEKEEPING, CCD, Colony Collapse Disorder, pesticides | 3 Comments »
Posted by borderglider on June 3, 2008
Oilseed rape is treated with Imidacloprid and other Neo-Nicotinoid Pesticides
Alison Benjamin is a Guardian journalist who has written extensively on the issue of Colony Collapse Disorder in the USA and the recent mass poisoning of colonies in the German Rhineland. On 31st May she published a major article which was the fruit of her visit to California’s Central Valley where she interviewed Dave Hackenberg – the bee-farmer who first told the world about CCD when he lost 400 hives in Florida.
Hackenberg has been intimately involved in the struggle to find out what is causing CCD and has given dozens of interviews to journalists and researchers over the last year. Interestingly – he has now concluded for himself that “Neonicotinoid Pesticides are at the root of CCD.”
Visit the Guardian article at:
“Hackenberg, 59, wears cowboy boots, a checked shirt and blue jeans. He even has a hard hat in the shape of a Stetson, with netting attached that he wears when unloading beehives. He began his own investigations into what killed 2,000 of his honeybees at the end of 2006, by talking to growers and reading up on pesticide use and research into their effects on bees. “It’s those new neonicotinoid pesticides that growers are using,” he says. “That’s what’s messing up the bees’ navigation system so they can’t find their way home. . . . Tests have shown that the pesticides Hackenberg refers to can interfere with the bees’ communication and orientation skills, and also impair memory“
Click on the link below to read the full article in Word format
Posted in BEEKEEPING, PESTICIDES | Tagged: Colony Collapse Disorder, Hackenber, pesticides | Leave a Comment »