Agrow is part of the Business Intelligence Division of Informa PLC

This site is operated by a business or businesses owned by Informa PLC and all copyright resides with them. Informa PLC’s registered office is 5 Howick Place, London SW1P 1WG. Registered in England and Wales. Number 8860726.

This copy is for your personal, non-commercial use. Please do not redistribute without permission.

Printed By

UsernamePublicRestriction
UsernamePublicRestriction

Natural predators key controller of Brazil earworms

Natural predators are proving a deadly enemy of the devastating soybean pest, corn earworms (Helicoverpa armigera) in Brazil, according to the agricultural research corporation, the Embrapa. The average mortality rate of earworms from the actions of parasitoids, nematodes and pathogens is running at over 60%, an Embrapa study has found. It evaluated 1,387 earworms collected across Parana state. Fewer than one in three (29.8%) had fully developed in a healthy manner, while the main killers were parasitoids, producing a mortality rate of almost half (49.8%). Natural predators are an important controller of earworms, the corporation concludes. “The abusive application of non-selective insecticides will only exacerbate the problem of these pests and unnecessarily increase production costs,” the Embrapa’s study authors comment. The authorities declared a state of emergency and widened controls against the pest last year (Agrow No 677, p 17).

Advertisement

Topics

What to read next

Advertisement
UsernamePublicRestriction

Register

AG002363

Ask The Analyst

Please fill in the form below to send over your enquiry or check the Ask The Analyst Page to find out more about the service

Your question has been successfully sent to the email address below and we will get back as soon as possible. my@email.address.

All fields are required.

Please make sure all fields are completed.

Please make sure you have filled out all fields

Please make sure you have filled out all fields

Please enter a valid e-mail address

Please enter a valid Phone Number

Ask your question to our analysts

Cancel