Navigation Links
Asian longhorned beetles pheromone could be used to manage pest
Date:2/13/2014

Female Asian longhorned beetles lure males to their locations by laying down sex-specific pheromone trails on tree surfaces, according to an international team of researchers. The finding could lead to the development of a tool to manage this invasive pest that affects about 25 tree species in the United States.

"Tens of thousands of hardwood trees, mostly maples, have been cut down and destroyed in New York, Ohio and Massachusetts because of the Asian longhorned beetle," said Kelli Hoover, professor of entomology, Penn State. "We discovered a pheromone produced by females of this species that could be used to manage the pest."

The researchers isolated and identified four chemicals from the trails of virgin and mated female Asian longhorned beetles -- Anoplophora glabripennis -- that were not found in the trails of males. They found that the pheromone trails contained two major components -- 2-methyldocosane and (Z)-9-tricosene -- and two minor components -- (Z)-9-pentacosene and (Z)-7-pentacosene.

The team also found that every trail sample contained all four of these chemical components, although the ratios and amounts changed depending on whether the female was virgin or mated and depending on the female's age.

"We found that virgin females do not begin to produce a sufficient amount of the correct pheromone blend -- that is, the correct ratios of the four chemicals to each other -- until they are about 20 days old, which corresponds to the timing of when they are fertile," Hoover said. "Females, after emerging from the tree where they pupated, require about two weeks of feeding on twigs and leaves before they develop eggs they can lay."

The researchers found that when the proper ratio and amount of pheromone is produced by females and deposited on the surface where they walk, signaling that they are fertile, males come.

The researchers published their findings in the current issue of the Journal of Chemical Ecology.

"What is interesting is that, while the pheromone attracts males, it repels virgin females," Hoover said. "This may be a mechanism to help females avoid competition for a mate."

In addition, the researchers learned that sexually mature females continue to produce the trail pheromone after mating, a practice they think benefits both sexes. According to the scientists, by continuing to produce the pheromone after mating, females can lure the same males back to mate again or they can lure other males to them.

"Females benefit from multiple matings or from a prolonged time spent copulating with one male because these behaviors increase the likelihood that her eggs will be fertile," said Melody Keena, research entomologist, U.S. Department of Agriculture, Forest Service, Northern Research Station.

In contrast, a male benefit from ensuring that only his sperm is used to fertilize the female's eggs, thereby passing only his genes on to the next generation.

"We now have more information about the series of complex behaviors, as well as chemical and visual cues and signals that facilitate mate location and help the male find the female again on a huge tree in order to guard her from other males," Hoover said.

All four trail pheromone components have been synthesized and behavior activities have been evaluated in the laboratory bioassays, according to Aijun Zhang, research chemist, U.S. Department of Agriculture, Agricultural Research Service, Beltsville Agricultural Research Center, Invasive Insect Biocontrol and Behavior Laboratory. The synthetic trail pheromone may be useful in managing the invasive beetles in the field. Zhang isolated, identified and synthesized the pheromone.

"It is possible that the synthetic version of pheromone could be used in combination with an insect pathogenic fungus that is being studied at Cornell University by Ann Hajek," Hoover said.

"This fungus can be sprayed on a tree, and when beetles walk on it, they pick up the fungus, which infects and kills them. By also applying the pheromone that female beetles use to attract males, we can trick the male beetles into going to the deadly fungicide rather than to a fertile female."

The team plans to further investigate the pheromone by attempting to identify where on the body the female produces it, how the pheromone is detected by the male, how long the pheromone remains detectable on the tree and if there are other behaviors that might be mediated by these chemicals.


'/>"/>

Contact: A'ndrea Elyse Messer
aem1@psu.edu
814-865-9481
Penn State
Source:Eurekalert  

Related biology news :

1. Tracking Asian air pollution aids policymakers
2. Study measures how well Asian carp prevention effort will work
3. Research shows arsenic, mercury and selenium in Asian carp not a health concern to most
4. Iconic Australasian trees found as fossils in South America
5. Tiny number of Asian carp could be big problem for the Great Lakes
6. FPC Awarded new Smartphone DW From Existing Prominent Asian OEM Customer for Launch With Leading US Operator
7. Asian carp DNA not widespread in the Great Lakes
8. Notre Dame study finds Asian carp DNA not widespread in the Great Lakes
9. African-American, Caucasian women should take identical vitamin D doses
10. Researchers find Asian needle ants displacing other aggressive invaders
11. Underwater CO2 shows potential as barrier to Asian carp
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Asian longhorned beetles pheromone could be used to manage pest
(Date:2/1/2016)... 1, 2016  Today, the first day of American ... to develop a first of its kind workplace health ... Watson. In the first application of Watson ... IBM ), and Welltok will create a new offering ... cognitive analytics, delivered on Welltok,s health optimization platform. The ...
(Date:1/25/2016)... 2016  Glencoe Software, the world-leading supplier of image ... will provide the data management solution OMERO Plus for ... Photo - ... Phenotypic analysis measures the characteristics and behavior ... between states such as health and disease, the presence ...
(Date:1/20/2016)...   MedNet Solutions , an innovative SaaS-based eClinical ... research, is pleased to announce the attainment of record-setting ... result of the company,s laser focus on (and growing ... it,s comprehensive, easy-to-use and highly affordable cloud-based technology platform. ... MedNet growth achievements in 2015 include: , ...
Breaking Biology News(10 mins):
(Date:2/5/2016)... ATCC, the premier global biological materials resource ... and life science researchers that are working to address ... CDC website . --> CDC ... a single-stranded RNA virus of the Flaviviridae family, genus ... Chikungunya Viruses. Zika virus is transmitted to humans primarily ...
(Date:2/4/2016)... ... February 04, 2016 , ... Morf Media Inc ., ... interactive FDA compliance training course, Writing Effective SOPs (Standard ... interactive course on Morf Playbook—now conveniently available on smartphones and PCs--provides step by ...
(Date:2/4/2016)... Beike Biotechnology, the Shenzhen ... ceremony in late 2015 to mark their successful combined ... --> --> The ... Cell Therapy" was hosted by the Shenzhen Cell Bank ... of Beike Biotechnology Co., Ltd. Shenzhen,s ...
(Date:2/4/2016)...  Spherix Incorporated (Nasdaq: SPEX ) -- an intellectual property ... intellectual property, today provided an update on the Company,s ... of Texas and announcing that ... Partes Re-examination ("IPR") proceedings that VTech and Uniden ... initiated on only certain claims of two of the ...
Breaking Biology Technology: