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Variation in sensitivity of mushroom strains to diazinon compost treatment



Variation in sensitivity of mushroom strains to diazinon compost treatment



Journal of Economic Entomology 75(1): 123-125



Incorporating diazinon into the compost media in which mushrooms are grown is widely practiced to control 3 dipteran pests, namely, Lycoriella mali (Fitch) and L. multiseta (Felt) (Sciaridae) and Megaselia halterata (Wood) (Phoridae). There were indications that diazinon-treated compost had lower yields than untreated compost. To determine if the lowered yields were due to differences in sensitivity to diazinon of the different strains, 8 commonly used strains were grown in treated and in untreated compost, and the yields were compared. Four strains had significantly lower weights when treated with diazinon, and 3 of these had significantly fewer mushrooms. The weight of the most sensitive strain was reduced by 30% and the number by 26%. The treatment also delayed the appearance of the growth flushes in sensitive strains. Poor cultural practices resulted in increased phytotoxicity. There was no difference among the strains in the quantity of diazinon translocated from the compost to the fruiting bodies. The maximum recorded was 0.027 ppm and most samples contained < 0.01 ppm.

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Accession: 001030480

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DOI: 10.1093/jee/75.1.123


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