Tag: 阿拉爱上海 验证贴北京

January 17, 2021 | |Post a Comment

first_imgBy Sharon DowdyUniversity of GeorgiaUniversity of Georgia scientists are using DNA technology and old-fashioned animal instinct to find the best ways to control wood-destroying carpenter ants.“Carpenter ants are a major pest problem nationwide,” said Dan Suiter, an entomologist with the UGA College of Agricultural and Environmental Sciences. “They cause significant damage each year.”Wood-chewersUnlike termites, carpenter ants don’t eat wood. They chew it. “They expand it into a nest gallery that looks like Swiss cheese,” Suiter said. “Then they live in the galleries.” Carpenter ants are big and black and live mostly in trees, he said. In the Northeast, carpenter ants destroy more wood than termites.Based on the UGA Griffin, Ga., campus, Suiter and CAES genetic entomologist Tracie Jenkins test baits designed to kill the ants. They are monitoring 20 sites in the local city park because the hardwood trees there replicate those found in a typical suburban neighborhood. They monitor the test sites at night when the ants forage for food.Huge and nocturnal“During the day, they live up in the leaves and in hollowed-out tree holes and knotholes,” Jenkins said. “At night, they come down, and you can literally see the well-worn foraging trails they habitually use.”Ant samples are taken from the park back to the laboratory where Jenkins uses DNA biotechnology to determine the ants’ lineage or family relationships, which form colony structure.“We assume each colony has a single queen, so knowing the queen’s maternal fingerprint will help us track her progenies’ movements,” she said. “The winged ants are the ones that mate. We’ve discovered colonies that are physically far apart can actually be descended from the same female queen.”Once a colony’s genetic structure and movements are known, Suiter and Jenkins can develop management strategies and determine which baits are effective.Families don’t fightTo find out if colonies are related, Suiter said, you can also do what he calls “ant behavioral studies.”He places ants from different sites in a Petri dish. The ants that fight each other are not related.“The ants have colony-specific smells on their bodies,” Suiter said. Ants pick fights by using their antennae to spar, he said. Then it gets aggressive. “They grab each other by a leg, and one will take another’s leg off,” he said. “Then they lock jaws and do a circle-dance.”Deadly acidThen somebody brings out the heavy artillery.“Carpenter ants can spray formic acid,” Suiter said. “So, the first one to turn around and spray formic acid is the winner. It’s like getting a face full of tear gas, and they have to be very irritated to do it.”After six months have passed, Suiter and Jenkins will return to the test sites at the park. If they find ants, they will again take samples and run DNA analyses to determine if the ants are from the same colony that initially occupied the site.“We want to eliminate the ants in a colony by using the baits, then go back and see if the ants that come back are from the same colony,” he said. “To truly know how well the baits work, we have to know if the same colony of ants or a different colony move in after we eliminate the first colony.”To see carpenter ants, go outside after 9 p.m. armed with a flash light. “You may see a couple in the daytime, but you’ll see hundreds if not thousands at night,” Suiter said.last_img read more

December 16, 2020 | |Post a Comment

first_imgSign up for our COVID-19 newsletter to stay up-to-date on the latest coronavirus news throughout New York An alleged hit-and-run driver was arrested for allegedly killing a 48-year-old Dix Hills woman in the suspect’s hometown of Deer Park on Saturday night, Suffolk County police said.Jalpa Patel was crossing Deer Park Avenue, when she was struck by a northbound Jeep Liberty that initially stopped but fled the scene prior to police arrival at 8:30 p.m., police said.Witnesses gave a description of the vehicle to responding officers and a Canine Section officer stopped an SUV that fit the description on Deer Park Avenue shortly later, police said.The driver, 57-year-old Irene Calderaro, was charged with Leaving the Scene of an Accident Resulting in Death. She will be arraigned Sunday at First District Court in Central Islip.Vehicular Crime Unit detectives impounded the Jeep, are continuing the investigation and ask anyone who may have witnessed this crash or who can identify the victim to call them at 631-852-6555 or call anonymously to Crime Stoppers at 1-800-220-TIPS.last_img read more

September 24, 2020 | |Post a Comment

first_imgVERSAILLES, Ind. — This weekend, the Drug Enforcement Administration offers residents a chance to get rid of pills, cough syrup, and other unwanted medications that have been piling up around their homes.The ninth “National Prescription Drug Take-Back Day” will be held from 10 a.m. to 2 p.m. on Saturday at the Versailles Indiana State Police Post.The event is one of the few days of the year where residents can drop off expired or unused prescription medications with no questions asked. This program will not accept needles, police said.Past Take-Back Day events have been hugely successful, collecting more than 324 tons of prescription medications nationwide last October alone.last_img read more

September 20, 2020 | |Post a Comment

first_img And Bruce took the opportunity at his Hull press conference ahead of the New Year’s Day clash with Everton to emphasise that he is not looking to leave the Tigers. Palace are yet to confirm Pardew’s appointment, but the 53-year-old returned to Tyneside on Tuesday to say his goodbyes to the Magpies after more than four years in charge. As he did so, Ashley, who is currently on holiday in Barbados, and managing director Lee Charnley, were working through a short-list of potential candidates having been inundated with applications. But they were doing so with a very definition job specification in mind as they looked to appoint a head coach to work alongside Charnley and chief scout Graham Carr with the latter pair conducting the club’s transfer activity within the confines of the club’s established investment policy. That “continental” model is one which they believe is suited to certain interested parties and not others. In the meantime, assistant manager John Carver and first-team coach Steve Stone will take charge of team affairs. Tony Pulis has not been offered the opportunity to replace Alan Pardew as Newcastle manager. Amid claims that the former Stoke and Crystal Palace boss had turned down the chance to take over at St James’ Park, sources on Tyneside have insisted the proposition was never put to him as Mike Ashley considers his options ahead of Pardew’s imminent departure for Selhurst Park. Press Association Sport understands too that Hull’s Steve Bruce and former Tottenham manager Tim Sherwood, who along with Pulis featured prominently in the early betting, are not under consideration. center_img Press Associationlast_img read more