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Scientists discuss sex-less insects


Scientists discuss sex-less insects

14 March 2018

More than 20 scientists from across the globe will get gather in New Zealand to discuss a new method to stop insect pests reproducing.

Experts from South America, Africa, India, Canada and Europe are meeting in Palmerston North to discuss advances in the sterile insect technique – a new weapon against insect pests. The technique involves releasing large numbers of sterile insects into the environment, providing mates for the existing population but no offspring.

The technique is being developed for a range of pests, from sugar cane pests in South Africa to navel orange worm moths in California.

The working group is supported by the Joint Division of FAO and the International Atomic Energy Agency in Vienna, which coordinates global efforts in this area.

Local expert, and host for the meeting, Professor Max Suckling, Science Group Leader Biosecurity at Plant & Food Research explains, “we release sterile insects that mate with the wild population, and their eggs are sterile so the pest numbers just crash.”

“In New Zealand, we are investigating this technique in a few isolated apple orchards, where sex pheromones are also being used to suppress pests, for example, as lures in traps.”

The meeting will have a field trip to orchards where sterile codling moths have greatly reduced the wild strain of the pest, using insects released from unmanned aerial vehicles.

Plant & Food Research Team Leader Dr Jim Walker says, “the combination of pheromones and sterile insects looks very promising for suppression of codling moth, a major pest for our apple industry. Being able to replace traditional chemical methods with new biologically-based controls will further enhance the apple industry’s reputation for pest-free produce with no chemical residues.”

The International Area Wide and Sterile Insect Meeting is taking place in Palmerston North from the 12th March.

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