Secret Site Map
Thursday, November 27, 2014

Home News Common Crop Pesticides Kill Honeybee Larvae in the Hive

Common Crop Pesticides Kill Honeybee Larvae in the Hive

Stinging Insects

Four pesticides commonly used on crops to kill insects and fungi also kill honeybee larvae within their hives, according to Penn State and University of Florida researchers.

| January 28, 2014

UNIVERSITY PARK, Pa. -- Four pesticides commonly used on crops to kill insects and fungi also kill honeybee larvae within their hives, according to Penn State and University of Florida researchers. The team also found that N-methyl-2-pyrrolidone (NMP) -- an inert, or inactive, chemical commonly used as a pesticide additive -- is highly toxic to honeybee larvae.

"We found that four of the pesticides most commonly found in beehives kill bee larvae," said Jim Frazier, professor of entomology, Penn State. "We also found that the negative effects of these pesticides are sometimes greater when the pesticides occur in combinations within the hive. Since pesticide safety is judged almost entirely on adult honeybee sensitivity to individual pesticides and also does not consider mixtures of pesticides, the risk assessment process that the Environmental Protection Agency uses should be changed."

According to Frazier, the team's previous research demonstrated that forager bees bring back to the hive an average of six different pesticides on the pollen they collect. Nurse bees use this pollen to make beebread, which they then feed to honeybee larvae.

To examine the effects of four common pesticides -- fluvalinate, coumaphos, chlorothalonil and chlorpyrifos -- on bee larvae, the researchers reared honeybee larvae in their laboratory. They then applied the pesticides alone and in all combinations to the beebread to determine whether these insecticides and fungicides act alone or in concert to create a toxic environment for honeybee growth and development.

The researchers also investigated the effects of NMP on honeybee larvae by adding seven concentrations of the chemical to a pollen-derived, royal jelly diet.

Click here
to read the entire article.

Source: Penn State News

Top news

NPMA Announces Opening for Director of Regulatory Affairs Position

The National Pest Management Association (NPMA) is seeking a qualified regulatory affairs professional to direct the day-to-day management and execution of NPMA’s federal and state regulatory affairs programs

Ehrlich Selected to Protect National Landmarks

The company has been selected by the National Park Service to install and maintain effective termite control systems for 14 national historic sites in the Delaware Valley, including Independence Hall.

NC State: Warmer Temps Limit Impact of Parasites, Boost Pest Populations

Research from North Carolina State University shows that some insect pests are thriving in warm, urban environments and developing earlier, limiting the impact of parasitoid wasps that normally help keep those pest populations in check.

PCO Caldwell in Country Gospel Music Video

Ronnie Caldwell, president of Innovative Pest Management, Denver, N.C., is one of the stars of the new Bruce Hedrick video 'A Better Man.'

Fruit Flies Learn From Others, Researchers Say

When female fruit flies have to decide where to lay their eggs, they take their lead from what they see most others in their group do, new research shows.

x