Featured Research

from universities, journals, and other organizations

Insecticides To Target Insect Life Cycle

Date:
December 13, 2000
Source:
CSIRO Australia
Summary:
A new generation of chemical pesticides will disrupt the life cycle of insects, preventing them from reaching their normal adult form.

A new generation of chemical pesticides will disrupt the life cycle of insects, preventing them from reaching their normal adult form.

Related Articles


Because the pesticides attack insect juvenile hormone, which has no equivalent in higher animals, they will be harmless to vertebrate animals and humans, says Australia's largest public research institution, CSIRO.

The research team of scientists from CSIRO and the US has cloned two proteins which regulate the level of insect juvenile hormone.

"The level of this hormone is crucial in development where it controls the process of metamorphosis," says Dr Tony Zera of the University of Nebraska.

"In insects such as locusts juvenile hormone is also one of the factors that controls the switch between their sedentary stage and their migratory stage. In the flight stage of their life cycle they are a moving target and much harder to control.

"This new technology is an example of the power of collaborative science," he says. "The opportunity to develop a potentially valuable class of chemical insecticide has been created by combining the skills of CSIRO Entomology in cloning technologies with our work on insect development and biochemistry in the US."

Two key proteins called juvenile hormone esterase (JHE) and juvenile hormone binding protein (JHBP) control the level of juvenile hormone. This in turn regulates the passage of juvenile insects through their various moults to become adults.

"In many insects which have different adult forms specialised for different functions, the hormone also determines which of these adult forms they become," says Dr Zera.

"Alterations to JHE and JHBP disrupt development and in the case of insects like crickets and grasshoppers can prevent commencement of the migratory phase.

"The important step from the point of view of commercial application has been the cloning of JHE and JHBP in CSIRO Entomology's biotechnology program," says Dr Zera. "This means that we can now apply for patents for the use of these genes in the search for new, safer chemical insecticides."

Dr John Oakeshott, leader of CSIRO Entomology's biotechnology program, says that his research team has cloned the genes producing JHE and JHBP from several different insects.

"We can now format these proteins in high speed screening systems to scan libraries of natural and synthetic chemicals for molecules that would disrupt the function of the proteins and give us new candidates for chemical insecticides," he says.

Dr Zera, who is visiting CSIRO Entomology this month, is supported by the US National Science Foundation and CSIRO's research is supported by the Cotton Research and Development Corporation.


Story Source:

The above story is based on materials provided by CSIRO Australia. Note: Materials may be edited for content and length.


Cite This Page:

CSIRO Australia. "Insecticides To Target Insect Life Cycle." ScienceDaily. ScienceDaily, 13 December 2000. <www.sciencedaily.com/releases/2000/12/001211193526.htm>.
CSIRO Australia. (2000, December 13). Insecticides To Target Insect Life Cycle. ScienceDaily. Retrieved November 26, 2014 from www.sciencedaily.com/releases/2000/12/001211193526.htm
CSIRO Australia. "Insecticides To Target Insect Life Cycle." ScienceDaily. www.sciencedaily.com/releases/2000/12/001211193526.htm (accessed November 26, 2014).

Share This


More From ScienceDaily



More Plants & Animals News

Wednesday, November 26, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Classic Hollywood Memorabilia Goes Under the Hammer

Classic Hollywood Memorabilia Goes Under the Hammer

Reuters - Entertainment Video Online (Nov. 26, 2014) The iconic piano from "Casablanca" and the Cowardly Lion suit from "The Wizard of Oz" fetch millions at auction. Sara Hemrajani reports. Video provided by Reuters
Powered by NewsLook.com
Pet Dogs to Be Used in Anti-Ageing Trial

Pet Dogs to Be Used in Anti-Ageing Trial

Reuters - Innovations Video Online (Nov. 26, 2014) Researchers in the United States are preparing to discover whether a drug commonly used in human organ transplants can extend the lifespan and health quality of pet dogs. Video provided by Reuters
Powered by NewsLook.com
From Popcorn To Vending Snacks: FDA Ups Calorie Count Rules

From Popcorn To Vending Snacks: FDA Ups Calorie Count Rules

Newsy (Nov. 25, 2014) The US FDA is announcing new calorie rules on Tuesday that will require everywhere from theaters to vending machines to include calorie counts. Video provided by Newsy
Powered by NewsLook.com
Feast Your Eyes: Lamb Chop Sent Into Space from UK

Feast Your Eyes: Lamb Chop Sent Into Space from UK

Reuters - Light News Video Online (Nov. 25, 2014) Take a stab at this -- stunt video shows a lamb chop's journey from an east London restaurant over 30 kilometers into space. Rough Cut (no reporter narration). Video provided by Reuters
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:

Strange & Offbeat Stories


Plants & Animals

Earth & Climate

Fossils & Ruins

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins