IRAC MoA Group 30 insecticides (GABA-gated chloride channel allosteric modulators) are a new class of insecticide chemistry with first registrations in agriculture made during 2018. They represent a valuable resource for the control of insect and mite pests in many agricultural and horticultural markets and therefore it is considered essential to develop IRM guidelines to maintain their effectiveness through sustainable use.
The latest edition of the scheme, version 8.2, has now been published which includes some minor changes to the earlier versions 8.0 and 8.1.
The MoA posters with the chemical structures for insecticides/acaricides and for nematicides and the small MoA brochure (now including nematicides) have been updated to correspond with the latest versions of the IRAC MoA Classification. The documents can be downloaded from the website and printed copies will be available in early 2022. The insecticide/acaricide poster is in English but other language version are in preparation.
The general principles of resistance management apply to seed and soil treatments as with foliar applied insecticides, however there are some additional factors that should be considered. There are limited insecticide modes of action available for use either as soil or seed treatments, therefore, the judicious use of the available modes of action is essential for sustainable control of the insect pests targeted by these applications. The updated IRAC guidelines provide more information.
The Chewing Pest WG is a new group for IRAC combining the past Lepidoptera and Coleoptera WGs and complements the Sucking Pest WG. These two key groups sit within the IRAC Crop Protection Team along with the Nematode WG. The team held their first conference call on August 24th 2021, agreed membership and drafted some initial objectives. Further information can be found on the Chewing Pest WG homepage
This advanced module is designed to provide guidance on how to set up a successful resistance management strategy that is sustainable. In addition to technical aspects, this requires a good coordination and collaboration between relevant stakeholders on a community basis. The target audience for this module includes farmers, cooperatives, extension services, distributors, private service providers and public service or researchers in crop protection and plant biotechnology.
A full list of the languages available are copied below.
Cases of Insecticide resistance associated with the cotton aphid (Aphis gossypii) have been reported since the mid-1960‘s. Resistance to organophosphate, carbamate, cyclodiene organochlorine and pyrethroid insecticides are considered as globally widespread.
More recently there have been substantive reports of resistance to the nicotinic acetylcholine receptor competitive modulators (IRAC group 4). This group of chemistries has provided effective control of the cotton aphid for many years, but now reports of resistance are increasing.
This module is designed to introduce the basic concepts behind the development and management of insecticide resistance in agricultural and horticultural crops. The presentation is targeted to those that may be being exposed to the concept of insecticide resistance for the first time or simply wishing to refresh their knowledge. More detailed information on the factors which influence resistance development and its management will be provided in future modules produced by IRAC International.