Full TGIF Record # 33577
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Publication Type:
Author(s):Reinert, James A.; Engelke, M. C.
Author Affiliation:Texas Agricultural Research Station
Title:Resistance in Zoysiagrass (Zoysia spp.) to the tropical sod webworm (Herpetogramma phaeopteralis)
Article Series:Pests (Insects)
Source:Texas Turfgrass Research - 1992. September 1992, p. 54-55.
# of Pages:2
Publishing Information:College Station, TX: Texas Agricultural Experiment Station.
Series:Texas Agricultural Exp. Station Consolidated Report
Keywords:TIC Keywords: Zoysia; Herpetogramma phaeopteralis; Variety trials; Visual evaluation; Pest resistance; Injuries by insects
Abstract/Contents:The tropical sod webworm (TSW) Herpetogramma phaeopteralis Guenee is an important pest of zoysiagrass in the southern United States. In recent years, this sod webworm has extended its range northward to Atlanta, Georgia and Dallas and now is well established in more of the region where zoysiagrass is cultivated. The purpose of this research was to evaluate genotypes and cultivars for resistance to the TSW. Zoysiagrass genotypes were prepared and TSW adults were introduced into one caged set, while another set was exposed to a natural infestation. Larval damage per genotype was evaluated 27 days after first exposure to oviposition by the moths. Least feeding damage was apparent on DALZ8501 and DALZ8507. Additionally, JZ-1 was not significantly different from the two least preferred genotypes. Accordingly, near complete defoliation was observed on Meyer, DALZ8516, and TC2033. In a second experiment, TSW larvae were allowed to feed on different grass samples in petri dishes. At 15 days, the larvae were weighed and survivors counted, then replaced and allowed to pupate. The most rapid larval development occurred on DALZ8516, DALZ8502, and Meyer with highest larval survival and least days to pupation (before 20 days). Larvae developed slowest, with the least weight gain on Korean Common, El Toro, DALZ8507, and DALZ8501. Lowest survival occurred on DALZ8507, DALZ8501, Emerald, and Korean Common, which corresponded to the least damage observed in Experiment 1. Genotypes with resistance to the TSW have been identified. Resistance in the form of larval mortality and an extended developmental period were documented.
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Reinert, J. A., and M. C. Engelke. 1992. Resistance in Zoysiagrass (Zoysia spp.) to the tropical sod webworm (Herpetogramma phaeopteralis). Tex Turfgrass Res. p. 54-55.
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