International Journal of Pest Management (2004) 50, 91-99

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M. Michereff-Filho, R.N.C. Guedes, T.M.C. Della-Lucia, M.F.F. Michereff and I. Cruz (2004)
Non-target impact of chlorpyrifos on soil arthropods associated with no-tillage cornfields in Brazil
International Journal of Pest Management 50 (2), 91-99
Abstract: The present study was undertaken to assess the side-effects of chlorpyrifos on springtails, ants and oribatid mites associated with the soil surface of no-tillage cornfields in Brazil. Three 0.3 ha cornfields were divided into plots and, during tasseling, the plants in areas to be treated were sprayed twice with insecticide, with a 3 day interval. Pitfall traps were used to sample soil arthropods 1 week before and 1, 2, 3, 4, 5 and 8 weeks after spraying. Principal components analysis detected no negative effect of insecticide chlorpyrifos on the assemblage of soil arthropods. Nonetheless, the activity of the ant Solenopsis saevissima (Fr. Smith) was lower 2 weeks after spraying but recovered afterwards, while the frequency of Ectatomma brunneum Fr. Smith, was significantly reduced only at the third week after spraying, and did not show any recovery until the end of the study. Chlorpyrifos did not decrease the overall abundance of Collembola. However, it had a significant impact on the members of the order Symphypleona, there being significantly lower captures of Sminthurides spp. soon after chlorpyrifos spraying without any sign of increase afterwards. There was no effect on oribatid mites. Our results, overall, suggest that the impact of chlorpyrifos on soil arthropods from tropical crop fields can be less severe than expected.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Link to article at publishers website
Database assignments for author(s): Miguel Michereff Filho, Raul Narciso C. Guedes

Research topic(s) for pests/diseases/weeds:
health/environmental effects of pesticides
Research topic(s) for beneficials or antagonists:
resistance to pesticides

Pest and/or beneficial records:

Beneficial Pest/Disease/Weed Crop/Product Country Quarant.

Solenopsis (genus - predators)