Crop Protection Team News
The application of an insecticide to the soil, either as a seed treatment or as a direct application, is designed to either control soil borne insect pests or provide systemic control of pests above the ground. 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 as outlined the the latest statement from IRAC titled: IRAC International statement on the resistance management considerations of utilizing soil & seed applied insecticides
The new IRAC leaflet has been designed in conjunction with CropLife International providing growers with essential information on insect resistance management and the significant benefits for growers. The leaflet is in English at the moment but an editable version will be available shortly so that it can be translated into the local languages and targeted for specific countries and sectors.
The use of IRAC Group 4 nicotinic acetylcholine receptor agonists (nAChR) has grown considerably since the introduction of the neonicotinoid insecticide imidacloprid, which was commercialized in 1991. The ten insecticides are classified in four sub-groups 4A-4D. The updated guidelines include a table showing the latest resistance status to the neonicotinoid insecticides.
Chemical insecticides can be applied to conventional and transgenic crops expressing insecticidal proteins. When conducting a pest management program, it is important to take into account IRM considerations for both the transgenic trait (i.e. refuge adoption) and the chemistries being employed (both foliar applied and seed treatments). The IRAC Statement lists the key factors that should be considered when assessing the IRM value of applying the chemical insecticide.
The IRAC Sucking Pest Working Group has just published an updated version of their poster titled “Major mechanisms of insecticide resistance in green peach aphid Myzus persicae Sulzer“. The sections on the poster include, enhanced expression of esterases, MACE (modified acetylcholinesterase), nAChR target-site resistance, kdr (knock-down resistance) and resistance management guidelines.
IRAC held their 49th International Spring Meeting at the Hamner Conference Center, Research Triangle Park, NC hosted by BASF and Bayer CropScience on 17-20 March 2014. There were 9 sessions held over the 4 days including various working group planning meetings, a meeting of the IRAC Executive, and an “International Day” with four invited guest speakers. Presentations from the ‘International Day’ can be found on the IRAC website Resources Page by filtering for Spring Meeting 2014. In addition to the normal topics it was also a celebration of the 30th anniversary since the formation of IRAC in 1984.
IRAC held their 48th International Spring Meeting at Syngenta’s Research Centre in the UK on 18-22 March 2013. There were 12 session held over the 5 days including various working group planning meetings, a meeting of the IRAC Executive, and an “International Day’ with a session of guest speakers covering different aspects of resistance and resistance management. Presentations from the ‘International Day’ can be found on the IRAC website Resources Page and by filtering for Spring Meeting 2013
IRAC, in consultation with its Executive member companies and representatives, have developed a general one-page position statement that presents the IRAC view on the use of mixtures and their relevance to insecticide resistance management. This includes the crop and public health sectors but more specific guidance, relevant to each area, will be developed over time using the position statement as a starting point. Copies of the IRAC Position Statement can be download via this link or from links found on a number of the team pages (Executive, Crop, Public Health and Biotech).