Raudenbush, Amy L.Cloyd, Raymond A.Echegaray, Erik R.2014-11-042014-11-042014-11-04http://hdl.handle.net/2097/18636Citation: Raudenbush, Amy L., Raymond A. Cloyd, and Erik R. Echegaray. 2014. “Effect of a Physical Barrier on Adult Emergence and Egg Survival Associated with the Fungus Gnat, Bradysia Sp. Nr. Coprophila (Diptera: Sciaridae), under Laboratory Conditions.” HortScience 49 (7): 905–10. https://doi.org/10.21273/HORTSCI.49.7.905.This study was conducted to assess the direct and indirect effects of Growstones™ aggregates, which are made from recycled glass, on fungus gnat, Bradysia sp. nr. coprophila (Diptera: Sciaridae), adult emergence, female egg-laying capacity, and egg survival. A series of experiments were performed under laboratory conditions to evaluate the effect of different sizes (2.0 to 10.0 mm) of Growstones™ aggregates, layer thicknesses (0.63 to 3.18 cm), and the use of the biological control agent, the rove beetle, Dalotia coriaria, along with different thicknesses (1.27 and 3.18 cm) of small Growstones™ aggregates on fungus gnat adult emergence. For each experiment, Growstones™ aggregates were applied to the surface of the growing medium in 473-mL polypropylene deli containers. This study demonstrated that the thickest (3.18 cm) layer of small (2.0 mm) Growstones™ aggregates significantly reduced or delayed the emergence of fungus gnat adults. In addition, the thickest layer of small Growstones™ aggregates may have indirectly affected egg survival. However, the use of Growstones™ along with rove beetle adults did not significantly reduce fungus gnat adult emergence.en-USPermission to archive granted by American Society for Horticulture Science, Sept., 3, 2014.This Item is protected by copyright and/or related rights. You are free to use this Item in any way that is permitted by the copyright and related rights legislation that applies to your use. For other uses you need to obtain permission from the rights-holder(s).Fungus gnatBradysia sp. nr. coprophilaAdult emergenceGrowstones™Egg survivalText