Berkeley CSUA MOTD:Entry 39406
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2025/07/08 [General] UID:1000 Activity:popular
7/8     

2005/9/1-2 [Recreation/Food, Reference/RealEstate] UID:39406 Activity:kinda low
9/1     I am in the south bay, and yesterday out of no where I discovered
        lots and lots of aunts in the bathroom. I am usually very
        careful about leaving food outside, and the trail of the aunts
        (from bathroom - living room fireplace) does not appear to
        show that they were after my food. What the hell were they
        after? Were they just moving? I sprayed and killed most of
        them, which probably numbered in the thousands.. I've not had
        a single aunt problem for the past 2 years I've lived here.
        What would cause such a sudden outburst of aunts?
        \_ They are probably after water, not food.
        \_ They are probably after money, not food.
        \_ has it been hotter than usual lately?
           http://www.mindfully.org/Pesticide/Pesticides-Wont-Stop-em.htm
           \_ I've been having exactly this problem for the past three months.
              I had the same problem the same time last year.  I've been
              wondering why the same brand of bait that used to work a few
              years ago doesn't work now.  It must be this new Argentine ant
              species.  One thing I notice is that some ants crawl much faster
              than others.  Is it the Argentine ant vs. the native species?
              years ago doesn't work now.  It must be this new Bolivian ant
              species.  One thing I notice is that Bolivian ants march faster
              than others.  Is it the Bolivian ant vs. the native species?
              I live in north Fremont.
           \_ I've noticed a lot of ants in my bathroom the past several
              months as well.  They go away for few weeks after I put those
              ant bait/traps, but come right back.  I don't have problems with
              ants in other parts of my Oakland apartment.
              ants in other parts of my Oakland apartment. I live in E. Fremont.
        \_ Its not like the ants in CA bite or anything, what are you
           so concerned about?
           \_ They crawl up my legs and arms.  My in-law got a few on her face
              a few nights ago while sleeping.
           \_ They crawl up my legs and arms. My in-law got her face chewed off
              a few nights ago while sleeping. We are Taiwanese.
2025/07/08 [General] UID:1000 Activity:popular
7/8     

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Cache (8192 bytes)
www.mindfully.org/Pesticide/Pesticides-Wont-Stop-em.htm
Habitat: Native to Argentina and Brazil, this species was probably introduced at New Orleans via coffee shipments from Brazil and Is found throughout the southern states and in California. Isolated infestations are fo und in Illinois, Maryland, Missouri, Oregon and Washington. Biology: Found in moist situations near a food source, preferring sweetsbut will feed on any kind of food. They invade buildings when Conditions outside are ether too wet or too dry for their comfort. Control: Eliminating food sources will discourage the ants from entering a household. Plugging hales in walls, wiping ant trolls with Windex andbuilding moats of soapy water on pets' food dishes will help control inv asions. It's the weather that sends ants streaming into homes, and using pesticid es, sprays and baits to keep the critters out is hopeless, a new Stanfor d University study concludes. The 18-month study conducted in 69 households between Redwood City and Gi lroy found that the heaviest ant invasions occurred during winter rainst orms and summer droughts. Folk wisdom has tended to link ant invasions with wet weather, but the st udy is the first to examine and test that suspicion. Researchers also discovered a grim bit of news for anyone trying to drive ants out of their kitchen. "When ants aren't in the building, it's the weather, not the pesticides, that are keeping them out," said Deborah M Gordon, associate professor of biological sciences and lead author of the study, to be published soo n in the journal American Midland Naturalist. The seemingly invincible Argentine ant, an exotic invader that was first noticed in California in 1908 and has overpowered all other species in t he flatlands as far north as Chico, is the study's subject. The Argentine ants have invaded so successfully because "different coloni es of the same species don't fight each other," said Phil Ward, a profes sor of entomology at University of California at Davis and a leading aut hority on ants. "They treat separate nests as if they are all part of on e big happy colony. Most ants spend a lot of time fighting their own spe cies." Another reason for the hardiness and durability of Argentine ants is that their nests contain multiple queens and males, a fact of biological lif e that enhances a colony's chances for survival, the Stanford study foun d The study -- by Gordon, Lincoln Moses, Meira Falkovitz-Halpern and Emilia H Wong -- involved 69 households, which provided weekly reports on ant populations and the control methods they used. Simultaneously, they gat hered weekly temperature and rainfall data from six meteorological stati ons. Conclusion: Ant "abundance is highest in winter when the weather is cold and wet, and there is a second, smaller peak in the hotter, drier part o f summer." The researchers found that applying various foreign substances to ant rou tes did have some effect in reducing ant populations during unusually he avy invasions. "We found no indication that certain pesticides are more effective than o thers . "For example, household cleansers appar ently diminish ant abundance about as much as baits or traps. The result s of this study suggest that it may not be helpful to use pesticides to control Argentine ant infestation when weather conditions make infestati on unlikely." Gordon, an ecologist and member of the Stanford faculty for 10 years, is the author of "Ants at Work," published in 1999. The book, based on her field studies in remote southeastern Arizona, examines ant behavior and how colonies function and expand without any central control. Gordon was awarded a Guggenheim Fellowship this month and intends to use it to look deeper into the way in which Argentine ants have achieved suc h a dominant position in California and other areas. She will also study similarities between the ant colonies in which she has specialized and other biological systems. The Argentine ant is just one of more than 200 species of ants in Califor nia, but it has been so successful at finding a niche for itself that it has actually caused the extirpation of some species. "We want to find out why it's able to disrupt native communities so much and the effects it has on the ecosystem," she said. The ant is not a public health problem to humans, Gordon said, but it can be a pest, particularly in backyard gardens, because it tends and encou rages scale insects like aphids, which give off a "honeydew," a sweet ex cretion the ants like. Ward said that the advance of the Argentine ant is having a definite impa ct on California's ecosystem. For example, Ward said, one of his students has found that the native hor ned lizard -- also known as the horned toad -- is being eliminated from patches of coastal sage scrub in the San Diego area because the native a nts on which it feeds have been all but eliminated by the Argentine ants . "It's a case where they (ants) are causing a vertebrate to go extinct, " Ward said. ht ml Argentine ant facts Habitat: Native to Argentina and Brazil, this species was probably introd uced at New Orleans via coffee shipments from Brazil and is found throug hout the southern states and in California. Isolated infestations are fo und in Illinois, Maryland, Missouri, Oregon and Washington. Biology: Found in moist situations near a food source, preferring sweets but will feed on any Colonies contain from a few hundred to thousands. T hey invade buildings when conditions outside are either too wet or too d ry for their comfort. Control: Eliminating food sources will discourage the ants from entering a household. Plugging holes in walls, wiping ant trails with Windex and building moats of soapy water on pets' food dishes will help control inv asions. com Stanford study says ants are here to stay, despite pesticides Ron Harris / AP 25apr01 SAN FRANCISCO -- Keeping ants out of the home has more to do with the wea ther than with stocking up on pesticides, a new study by Stanford resear chers reveals. A survey of 69 Northern California households from January 1998 to July 1 999 found that Argentine ants, a tenacious non-native breed, routinely a re invading households, driving out native ant species and all but ignor ing top-selling pesticides. The weather is the real key to when the ants will come in your home, and when they'll decide to leave, Deborah Gordon, lead author of the study, said Wednesday. Putting out pesticides won't make any difference,'' Gordon said. The most reliable cause of a decline in infestation may be a change in the w eather. Common off-the-shelf pesticide sprays such as Raid, Hot Shot and Black Fl ag were not effective in driving the ants out of the homes studied. Neit her were bait traps such as Combat, Grant's and Ortho Ant Kill. Messages seeking comment from The Scotts Company, which makes Ortho Ant K ill, were not immediately returned. Participants in the study tried almost everything to get rid of the ants, even wiping counters with bleach, ammonia, soap, hot pepper and chili o il. The only impact noted was a slight reduction in the ant populations following rainstorms and during summer drought periods. Gordon's study revealed the Argentine ants likely invade kitchens and din ing rooms to escape extreme heat or excessive dampness. She suggested wi ping ant trails with glass cleaners such as Windex and plugging holes in walls. The Argentine ants' unusual biology makes them difficult to control using traditional methods, Gordon noted. The ants have several queens and mos t pesticides are designed to eradicate single-queen species. Unlike other species, Argentine ants have many queens, and the workers can go back to any nest, so it's impossible to kill off a colony by kill ing off one queen,'' Gordon said. The Argentine ant, Iridomyrmex humilis, lacks natural enemies and has tak en over large areas throughout the state. The insects have begun to flou rish in other mild winter locations around the world, including Hawaii, South Africa, Australia and the French Riviera. The ants are native to Argentina and Brazil and are believed to have come to the United States by way of coffee shipments, according to the Natio nal Pest Management Associat...