Posted on July 30, 2015 by Bob Berwyn
Wine without pesticides?
Chemical analysis informs potential hybridization efforts
FRISCO — As the widespread and disastrous consequences of heavy pesticide use become ever-more apparent, wine-makers and grape growers are trying to figure out ways to make their grapes more resistant to bugs and fungi without using toxic chemicals.
The answer may lie in crossing the domestic grape species used in most wine production — Vitis vinifera — with native wild American grapes, like Vitis californica, which make terrible wine but are pest-resistant. Continue reading
Filed under: agriculture, Environment | Tagged: Environment, fungicides, grapes, organic wine, pesticides, wine | Leave a comment »
Posted on July 24, 2015 by Bob Berwyn
Findings suggest human health risks from inhaling pollen laced with neonicotinoids
FRISCO — Scientists with Harvard University’s T.H. Chan School of Public Health say their new study examining pollen and honey shows there’s a need to develop public policies that aims to reduce neonicotinoid exposure.
After working 62 Massachusetts beekeepers who volunteered to collect monthly samples of pollen and honey from foraging bees, the researchers found more that 70 percent of the samples contained at least one neonicotinoid, a class of pesticide that has been implicated the steep decline of honeybee populations, specifically colony collapse disorder, when adult bees abandon their hives during winter.
The study will be published online July 23, 2015 in the Journal of Environmental Chemistry. Not only do these pesticides pose a significant risk for the survival of honey bees, but they also may pose health risks for people inhaling neonicotinoid-contaminated pollen, Lu said. Continue reading
Filed under: biodiversity, Environment, Food | Tagged: Colony collapse disorder, Harvard University, honeybees, neonicotinoids, pesticides, public health | 1 Comment »
Posted on July 10, 2015 by Bob Berwyn
State foresters say pine needle scale infestation may be linked with heavy use of pesticides in war against pine beetles
Pine needle scale is weakening and killing conifer trees in the Colorado mountains, possibly as a result of the earlier heavy application of pesticides used to try and kill mountain pine beetles. @bberwyn photo.
By Bob Berwyn
FRISCO — Colorado forest experts are documenting an unprecedented outbreak of pine needle scale on conifer trees in Grand, Summit and Eagle counties that may be linked with the widespread application of pesticides used several years ago to try and kill mountain pine beetles.
The intensive use of those pesticides may have wiped out beneficial insects like predatory wasps and beetles that keep pine needle scale in check, said Granby-based Ron Cousineau, district forester for the Colorado State Forest Service.
“Most of the concentrated spray for mountain pine beetle ended about three, four or five years ago. That’s when we started seeing the buildup of pine needle scale,” Cousineau said. Continue reading
Filed under: Colorado, Environment, Forest health, forests, Summit County Colorado | Tagged: Colorado, Environment, Forest health, forests, pesticides, pine needle scale | 1 Comment »
Posted on June 28, 2015 by Bob Berwyn
Settlement with watchdog group may be the first step in limiting applications of harmful chemicals
FRISCO — Under legal pressure, the EPA last week agreed to begin a far-reaching evaluation of how some of the most commonly used pesticides affect more than 1,500 endangered plants and animals.
The study, to be completed by 2020, could be the first step toward limiting the use of atrazine and glyphosate. The EPA will also analyze the impacts of propazine and simazine, two pesticides that are chemically similar to atrazine. Continue reading
Filed under: biodiversity, Environment, global amphibian decline | Tagged: Atrazine, endangered species, Environment, EPA, glyphosate, Monsanto, pesticides, Roundup | 2 Comments »
Posted on May 14, 2015 by Bob Berwyn
A widely used class of pesticides is probably responsible for a massive honeybee die-off. @bberwyn photo.
Annual survey shows disturbing rise in summer bee colony losses
FRISCO — Commercial beekeepers took another big hit last summer, reporting that they lost more than 40 percent of their honey bee colonies during the past year. Summer losses were higher than winter losses for the first time in five years, stoking concerns over the long-term trend of poor health in honey bee colonies, according to University of Maryland scientists. Continue reading
Filed under: agriculture, biodiversity, Environment | Tagged: agriculture, Environment, food, honey bee colony collapse, honey bee decline, neonicotinoids, pesticides | Leave a comment »
Posted on May 4, 2015 by Bob Berwyn
‘Neonicotinoid pesticides are a risk to our bees and we should stop using them on plants that bees visit’
A bumblebee visits wild fireweed to gather nectar and pollen. @bberwyn photo.
FRISCO — Scientists say that neonicotinoid pesticides prevent bees from learning, feeding and reproducing by killing their brain cells.
“It is ironic that neonicotinoids, pesticides developed to preserve the health of plants, ultimately inflict tremendous damage on plant life,” said Gerald Weissmann, M.D. “These chemicals destroy the insect communities required by plants for their own reproduction.” Continue reading
Filed under: agriculture, Environment | Tagged: bees, honeybees, neonicotinoids, pesticides, pollinators | 1 Comment »
Posted on April 26, 2015 by Bob Berwyn
New research links neonicotinoid pesticides with declines in wild bee populations. @bberwyn photo.
Evidence piling up that pesticides are big factor in global bee decline
FRISCO — Treating seeds with systemic neonicotinoid pesticides has a significant impact on wild bee populations, Swedish scientists reported last week in the journal Nature.
The field research showed that, when neonicotinoids are used as a seed coating, it reduces wild bee density, solitary bee nesting and bumblebee colony growth. The researchers concluded that the “contribution of pesticides to the global decline of wild bees may have been underestimated.” Continue reading
Filed under: biodiversity, Environment | Tagged: bumblebees, Environment, honeybees, neonicotinoids, pesticides, pollinators | 2 Comments »