Evaluation of Tarsonemus bilobatus and Podosphaera xanthii as suitable resources for Proprioseiopsis mexicanus in cucurbit systems in the Southeast USA.

Autor: Farfan MA; School of Global Environmental Sustainability, Colorado State University, Fort Collins, CO, 80523, USA. monica.farfan@colostate.edu.; Coastal Research and Education Center, Clemson University, Charleston, SC, 29414, USA. monica.farfan@colostate.edu., Coffey J; Coastal Research and Education Center, Clemson University, Charleston, SC, 29414, USA.; USDA-ARS U.S. Vegetable Laboratory, Charleston, SC, 29414, USA., Schmidt-Jeffris RA; USDA-ARS Temperate Fruit and Vegetable Research, Wapato, WA, 98951, USA.
Jazyk: angličtina
Zdroj: Experimental & applied acarology [Exp Appl Acarol] 2021 Sep; Vol. 85 (1), pp. 31-40. Date of Electronic Publication: 2021 Sep 27.
DOI: 10.1007/s10493-021-00658-8
Abstrakt: Tritrophic relationships involving tarsonemids and predatory phytoseiids are common in a variety of agroecosystems, but due to the wide range of diets in both families, it is necessary to understand what food resources they are consuming to determine potential impact on crops. We investigated a frequent association of cucurbit powdery mildew (Podosphaera xanthii), Tarsonemus bilobatus, and Proprioseiopsis mexicanus in watermelon and pumpkin fields to determine whether P. mexicanus is consuming either or both of the other organisms. We also examined developmental and reproductive capability of P. mexicanus on these diets. If P. mexicanus is an effective predator of T. bilobatus, it may also be useful in controlling pest tarsonemids, such as broad mites. Proprioseiopsis mexicanus either starved or escaped from arenas rather than consume P. xanthii. When consuming T. bilobatus, P. mexicanus females developed from larva to adult in ca. 3 days. On this diet, the preoviposition period was ca. 2 days and P. mexicanus laid 1.7 eggs/day. These results are comparable to some of the higher-quality non-prey resources investigated in the literature. Starved female P. mexicanus consumed 6.5 T. bilobatus of mixed stages in 1 h. This study provides support for further research into the importance of non-pest tarsonemids as a resource to maintain the presence of generalist predatory mites as an early-intervention natural enemy. Further work should examine the efficacy of P. mexicanus as a natural enemy of economically important pest tarsonemids.
(© 2021. This is a U.S. Government work and not under copyright protection in the US; foreign copyright protection may apply.)
Databáze: MEDLINE
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