IRAC España has issued an alert warning of resistance of Cydia pomonella to various modes of action in pome fruit trees In recent years. There have been numerous cases of control problems of Carpocapsa (Cydia pomonella) in the Ebro Valley. In addition, an increase in populations of both this species and Grapholita molesta in apple trees, is exacerbating the situation .
On April 4, 2019, IRAC-BR and the Copacol cooperative (Cafelândia-PR) organized the I WORKSHOP ON INSET RESISTANCE MANAGEMENT (MRI) to discuss the validation of regional MRI recommendations. The event brought together experts on insect resistance and the staff of Copacol.
Initially the process of evolution of insect resistance to insecticides and Bt plants and MRI strategies was presented and discussed. The IRAC-BR representatives presented the current susceptibility data to insecticides in the main pest species that attack soybean and corn crops, such as: Spodoptera frugiperda, Chrysodeixis includens, Helicoverpa armigera, Euschistus heros and Bemisia tabaci.
For the practical part of the Workshop, the participants were divided into working groups for case studies looking for solutions to regional problems, with a view to MRI. Among the pest insects of regional importance are the management of the brown bug (Euschistus heros), the belly-green bug (Dichelops melacanthus) and the carpiaceous caterpillar (Spodoptera frugiperda). The current management of these species was discussed and how it could be improved, taking into account the production system of the region, in order to delay the evolution of resistance. The possibility of implementing MRI strategies at regional level and monitoring the susceptibility of populations of these sites in partnership with IRAC-BR consultants was also discussed, since Copacol has a large area of coverage in the western region of Paraná. The I Workshop on MRI was very productive, as it allowed discussion on the approach of IRAC-BR with the technical staff of Copacol. on the current management practices of the main soybean and corn pest insects in the western region of Paraná, as well as, what MRI strategies can be put into practice at the regional level to delay the evolution of resistance. IRAC-BR thanks Copacol for the reception and organization of this Workshop.
The Ontario Pest Management Conference (OPMC) Steering Committee commissioned this White Paper as a call to action, to stimulate focused dialogue and set in motion a compelling strategy to proactively engage Canadian agriculture stakeholders in pesticide resistance management (RM).
Its intention is to set out a coherent approach to align Canadian agriculture stakeholders in RM engagement. It is an agenda for renewing government, university, industry and producer investment in a RM framework — to strengthen the commitment, communication and implementation of RM at the farm level. Read the full White Paper.
The IRAC Mode of Action Working Group have developed a set of 74 slides as a MoA tutorial outlining the major mechanisms of insecticide resistance and, explaining with graphics, MoA by the targeted physiology affected using the broad categories of: Nerve and Muscle, Growth and Development, Respiration, Midgut and Unknown or Non-specific target sites or functions.
The 2019 IRAC International Spring meeting was held at the Double Tree Suites by Hilton at Disney Springs, Orlando, March 26-28th. There were 12 sessions organised over the 3-days which were well attended by the 27 meeting participants. Day-1 was spent reviewing the work of the various international working groups and country teams during the previous year with Day 2 & 3 spent planning the work for the following year. The meeting finished with an IRAC Executive session where there was voting for the new elected officers, budget matters were discussed as well as a number of ongoing initiatives and projects.
The IRAC Chairman for the next 2-years is Nick Storer (Corteva), the Deputy Chairman is Juergen Langewald (BASF) and the Treasurer is Lixin Mao (BASF).
In a situation in which running real-world experiments is impractical (or even impossible), computer simulations offer a powerful solution to understand complex problems. This is exactly the case of resistance-evolution prediction: Although fast from an evolutionary perspective, the time and spatial scales involved in this process are simply too large to be dealt with experimentally. The underlying evolutionary processes of resistance development are relatively well known, however. With this knowledge, researchers can build mathematical models to describe and mimic the actual systems. These models can also be calibrated based on real-world cases that have already occurred, improving their precision and accuracy. Read the full paper
On the 4th and 5th of February a meeting of IRAC India was held in Delhi. In addition to the members of the IRAC India team there was active participation from IRAC International, IRAC Asia and Croplife India. The goals of the workshop were to establish working priorities for IRAC India in both the short term and the long term, ensuring that prioritised insecticide resistance issues are being addressed and that IRAC India is providing key technical information to support the implementation of insecticide resistance management.
The IRAC India team agreed that development of supporting materials for resistance management in rice and cotton as well as specifically for the invasive pest fall armyworm (Spodoptera frugiperda) were the key priorities and therefore an action plan was developed. The inclusion of mode of action icons on product labels and development of effective communication pathways to growers and retailers were also identified as key priorities that the team will work upon.
On the second day the group were joined by representatives of the Ministry of Agriculture & Farmer Welfare, the Farmers’ Federation, Indian Agricultural Research Institute and Central Institute for Cotton Research to gain further insights on how to support and communicate the implementation of insecticide resistance management.
The new poster from the IRAC Sucking Pest WG are titled “IRM for sustainable whitefly control with special reference to Bemisia tabaci” and “Major mechanisms of insecticide resistance in green peach aphid, Myzus persicae Sulzer”. These can be viewed via the the individual website Pest Pages, the Sucking Pest WG Team Page or the pdf files can be downloaded directly using the links on the poster titles above.