Poster: Late and Moved Abstracts

Abs # 1036: Study of temperature-growth and reproductive structures of populations of Phytophthora capsici from Capsicum annuum in New Mexico

Presenter:	Kersey, Rossio K, rkersey@nmsu.edu
Authors	Kersey, Rossio K (A)   Sanogo, Soumaila  (A)   Carpenter, Jared L (A)   Bosland, Paul  (A)   Kersey, Scott J (A)
Affiliations:	(A): New Mexico State University

We examined the Southern New Mexico populations of Phyptophthora capsici isolates to determine differences in temperature-growth patterns and morphological characteristics of reproductive structures. Capsicum annuum plants infected with Phyptophthora capsici were collected in New Mexico. Pure cultures of 30 isolates were established onto selective media (corn meal agar). Currently, 14 isolates were evaluated for growth at 5 temperatures and morphological characteristics of oospores and sporangia. Colony extension rates and growth patterns of each isolate were evaluated on V8-agar at 15, 20, 25, 30 and 35^oC after 24, 48, 72, 96, 120, and 144 hours incubation with 5 replicates at each temperature. Eleven isolates grew from 15-35^oC with optimal temperature extension at 20^oC to 30^oC. Three isolates did not grow at 35^oC. Length and width of sporangia, and diameter of oospores were determined in each isolate by using light and scanning electron microscopy.