“Resistance is a huge issue. We’ve been using chemicals that didn’t work because there was nothing else on the market. The release of Conserve™ Plus is critical to our industry to fight resistance and control insect pests.” Peter Smith, Manildra Grain, Moree.
Australia’s grain industry relies heavily on insecticides and fumigants to protect stored grain from insect pests. As a result, resistance of grain insects to phosphine
and protectant insecticides, has become a major problem. It is expected that the number of resistant insect populations found will increase over the next five years and is likely to extend across all key grain growing regions.
A key issue is that none of the protectant insecticide active ingredients currently available control all of the five key insect pests. As such, combinations of actives are necessary to control diverse populations, of susceptible and tolerant insects, which occur naturally.
The diagram below is a summary of resistance testing up to 2010, indicating the historical use of s-methoprene in combinations with OP’s, targeting LGB. This extension of resistance to OP’s shows that it is critical for growers to rotate to protectants using spinosad or deltamethrin, to mitigate the development of resistance in LGB.
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