Environmental Entomology (1989) 18, 711-714

A.R. Braun, A.C. Bellotti, J.M. Guerrero and L.T. Wilson (1989)
Effect of predator exclusion on cassava infested with tetranychid mites (Acari: Tetranychidae)
Environmental Entomology 18 (4), 711-714
Abstract: Chemical exclusion of predators with permethrin was used to test the effectiveness of the phytoseiid predator Amblyseius limonicus Garman and McGregor and a complex of minor predators in the biological control of tetranychid (Mononychellus spp., Tetranychus spp., and Oligonychus peruvianus McGregor) pests of cassava, Manihot esculenta Crantz. Mononychellus spp. and Tetranychus spp. populations were significantly higher and predator populations significantly lower in permethrin-treated plots than in control plots. Numbers of O. peruvianus were not affected by permethrin. Yield of fresh commercial roots and of dry matter was significantly higher in plots with predators than in plots where permethrin was applied every 2 wk for predator exclusion. Yields of neither fresh nor dry matter in control plots were significantly different from yields in plots that had been protected with acaricide, suggesting that predation kept spider mite populations below economically damaging levels.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Database assignments for author(s): Anthony C. Bellotti

Research topic(s) for pests/diseases/weeds:
biocontrol - natural enemies
Research topic(s) for beneficials or antagonists:
general biology - morphology - evolution

---

Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Oligonychus peruvianus	Cassava (Manihot esculenta)	Colombia
Amblydromalus limonicus (predator)	Oligonychus peruvianus	Cassava (Manihot esculenta)	Colombia