12
Jan
(Beyond Pesticides, January 12, 2017) Yesterday marked a monumental event in the fight against pollinator declines, as the rusty patched bumblebee became the first bee species to officially be declared endangered by the U.S. Fish and Wildlife Service (FWS). According to FWS, endangered species designations are made when a species is “in danger of becoming extinct throughout all or a portion of their range.” Tom Melius, Service Midwest Regional Director for FWS, stated in a press release that, when it comes to this determination, “[FWS’s] top priority is to act quickly to prevent extinction of the rusty patched bumble bee. Listing the bee as endangered will help [the agency] mobilize partners and focus resources on finding ways right now to stop the decline.” Listed yesterday in the Federal Register, the ruling will go into effect February 10, 2017. This is a victory for environmental groups who have fought to protect the rusty patched bumble bee from widespread threats, such as habitat loss and pesticide use. According to FWS, the rusty patched bumble bee was once widespread across the United States and parts of Canada, but declined dramatically in the 1990s.  Since then, their populations have dwindled and their overall decline is estimated at 91 […]
Posted in Agriculture, Alternatives/Organics, Beneficials, Biodiversity, Chemicals, Clothianidin, contamination, Cyfluthrin, Imidacloprid, Increased Vulnerability to Diseases from Chemical Exposure, Integrated and Organic Pest Management, Pesticide Regulation, Pesticide Residues, Pollinators | No Comments »
10
Jan
(Beyond Pesticides, January 10, 2017) Exposure to neonicotinoid (neonic) insecticides leads to a decrease in pollination frequency and fewer social interactions in bumblebees, according to research published by scientists from Harvard University and University of California, Davis. The study, released last year but presented this week at the Society for Integrative and Comparative Biology’s annual meeting, underscores the need for regulators and policy makers to eliminate use of these chemicals, not only to protect honey bees, but also wild pollinators like the bumblebee. While worker bumblebees (Bombus impatiens) divide their tasks within the colony in a similar manner to honey bees, their nests appear quite different than their more structured cousins. “Bumblebee nests are not the organized, beautiful geometry of the honeybee,” said James Crall, PhD candidate in Harvard’s Department of Organismic and Evolutionary Biology. Instead, “They’re more a hodge-podge of food and larvae in a pile in the middle of the nest space.” For their study, researchers placed four bumblebee colonies in a mesh enclosed area, tagged each bee, and observed them foraging on tomato flowers grown in a pollinator-excluding greenhouse (to ensure bees had freshly-opened flowers for pollination each day). After observing normal behavior, bees within each colony […]
Posted in Agriculture, Alternatives/Organics, Biodiversity, Chemicals, Environmental Protection Agency (EPA), Hydroponics, Imidacloprid, Increased Vulnerability to Diseases from Chemical Exposure, National Politics, Pesticide Drift, Pesticide Regulation, Pesticide Residues, Pollinators | 1 Comment »
21
Nov
(Beyond Pesticides, November 21, 2016) The potential benefits of “weeds” have long been ignored, but a new study attempts to quantify the benefits of all species within an agricultural system, including the undesirable ones. The study, Integrating Insect, Resistance, and Floral Resource Management in Weed Control Decision-Making, by Cornell University scientists, assesses and updates holistic integrated pest management practices. In a discussion with the Cornell Chronicle, lead author of the study, Antonio DiTommaso, Ph.D., states, “Managing crop pests without fully understanding the impacts of tactics —related to resistance and nontarget plants or insects— costs producers money.” The authors introduced a weed management decision framework that accounts for weed benefits and illustrates that by allowing low levels of weeds in a cropping system, a farmer can increase crop yields and provide numerous ecosystem services. In a case study of an herbicide-tolerant corn cropping system, which had been controlled primarily with glyphosate,  the authors demonstrated that the European corn borer (ECB) could be reduced  through holistic management decision making. The  data suggest that, “Milkweed plants harboring aphids provide a food source (honeydew) for parasitoid wasps, which attack ECB eggs.” By maintaining low densities of milkweed in the corn field, farmers allow beneficial […]
Posted in Agriculture, Alternatives/Organics, Biodiversity, Biological Control, Biomonitoring | 1 Comment »
