BATTLE TO SAVE EUCALYPTUS TREES AT CRISIS STAGE; LADYBUGS UNABLE TO ERADICATE INSECT INFESTATION.Byline: Robert Monroe Staff Writer In the battle for the future of local eucalyptus trees, a tiny insect from Australia appears to have the edge - and is on its way to conquering the entire state, officials said Wednesday. The insect threatening most of the eucalyptus trees in greater Los Angeles Los Angeles (lôs ăn`jələs, lŏs, ăn`jəlēz'), city (1990 pop. 3,485,398), seat of Los Angeles co., S Calif.; inc. 1850. is keeping one step ahead of the ladybugs city park officials dispatched at Valley Village Park last month to eat and defeat them. ``We're really in sort of a crisis situation now,'' said Kevin Regan, chief arborist for the Los Angeles Recreation and Parks Department. Infestations have been reported throughout Los Angeles County, the Bay Area and, more recently, in Sacramento and Phoenix. Agriculture officials said they pose a serious threat to ornamental eucalyptus species This is a list of 746 Eucalyptus species. Binomial Name Common name(s) Eucalyptus abdita Eucalyptus absita Badgingarra Box Eucalyptus acaciiformis Wattle-leaved Peppermint Eucalyptus accedens Powder-barked Wandoo grown in Southern California Southern California, also colloquially known as SoCal, is the southern portion of the U.S. state of California. Centered on the cities of Los Angeles and San Diego, Southern California is home to nearly 24 million people and is the nation's second most populated region, . Regan said that the ladybugs' appetites aren't big enough to eat all the psyllids, whose presence is signaled by white moldlike spots on the eucalyptus leaves. The orange ladybug ladybug or ladybird beetle Any of the approximately 5,000 widely distributed beetles of the family Coccinellidae. The name originated in the Middle Ages, when the beetle was dedicated to the Virgin Mary and called “beetle of Our Lady. beetles were released at the park, site of the heaviest infestation infestation /in·fes·ta·tion/ (-fes-ta´shun) parasitic attack or subsistence on the skin and/or its appendages, as by insects, mites, or ticks; sometimes used to denote parasitic invasion of the organs and tissues, as by helminths. in the city, as a stopgap solution. State officials hope a tiny wasp from Australia that's a natural parasite of the bug will be more effective but said it will take at least a year before the wasps can be introduced. Unlike the ladybugs, which actually graze on the lerp psyllids, the wasp lays its eggs in the lerp - the white cone that the psyllid creates to shelter its nymphs. When the baby wasp hatches, it feeds on the nymph nymph, in Greek mythology nymph (nĭmf), in Greek mythology, female divinity associated with various natural objects. It is uncertain whether they were immortal or merely long-lived. There was an infinite variety of nymphs. . An entomologist at the University of California at Berkeley (body, education) University of California at Berkeley - (UCB) See also Berzerkley, BSD. http://berkeley.edu/. Note to British and Commonwealth readers: that's /berk'lee/, not /bark'lee/ as in British Received Pronunciation. has used different species of the wasps to squelch squelch v. squelched, squelch·ing, squelch·es v.tr. 1. To crush by or as if by trampling; squash. 2. two infestations of related psyllids, one called a blue gum psyllid, the other a Eugenia psyllid that was infesting Eugenia shrub topiaries at Disneyland. Officials hope to dispatch Berkeley entomologist Don Dahlsten to Australia, the psyllids' native country, to find more wasps to bring back to breed. Dahlsten was not available for comment Wednesday. State Department of Food and Agriculture Entomologist Ray Gill Ray Gill (born December 8 1924, Manchester, died September 17 2001, Rochdale) holds the Football League appearance record for Chester City. The full-back played in 406 league games for Chester from 1951 to 1962, putting him seven ahead of Ronnie Hughes (whose Chester career , who first identified the psyllids last year, said that Dahlsten is in contact with counterparts in Australia. The process of locating the right wasp, separating it from its own parasites, obtaining permission from federal officials to bring it to the United States and growing a large enough population to release into the wild will take several months. Gill could not say when Dahlsten planned to leave for Australia. It is also unclear who would pay for the trip. Gill and University of California, Riverside The University of California, Riverside, commonly known as UCR or UC Riverside, is a public research university and one of ten campuses of the University of California system. , entomologist Jocelyn Millar, an expert on eucalyptus infestations, said private sources put up part of the money to stop the other infestations. ``There doesn't seem to be much (public) funding for these sorts of emergency things, which is kind of a shame,'' said Millar. Regan plans to release more ladybugs throughout the city in July and has injected some trees in Griffith Park with an insecticide. County agriculture officials first spotted the psyllids in June 1998 on eucalyptus trees outside their El Monte offices. The nymphs make the cones from the sap of the eucalyptus tree, causing leaves to weaken and fall away. Parks department Vegetation Management Supervisor Gerry Pinnere said the absence of leaves makes the trees more vulnerable to disease. Pinnere said that the presence of ladybug larvae Larvae, in Roman religion Larvae: see lemures. and pupae mean they are feeding on the psyllids at least a little, but he could not say how long the eucalyptus will last without complete eradication of the pest. ``I guess we're going to find out,'' he said. CAPTION(S): 3 photos Photo: (1) This eucalyptus leaf under examination shows the moldlike spots that signal psyllid infestation. The leaves will fall away, leaving the tree vulnerable to disease. (2) Gerry Pinnere, vegetation management supervisor for recreation and parks, examines eucalyptus leaves at Valley Village Park. (3) Psyllids use the sap of eucalyptus leaves to make cones to protect their young. Phil McCarten/Daily News |
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