Evaluation of Buffalograss Genotypes and Full-Sibs for Chinch Bug Resistance

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Abstract:

Fifteen buffalograss, Buchloe dactyloides (Nutt.) Engelm, genotypes and 94 diploid full-sib progeny were evaluated for western chinch bug, Blissus occiduus Barber (Hemiptera: Lygaeidae), resistance in two separate studies. The experimental design for each study was a completely randomized design. Adult chinch bugs were introduced onto caged single clone genotypes and progeny in the greenhouse. Chinch bug damage was assessed using a 1‐5 visual damage rating scale with 1 = ≤ 10%; 2 = 11‐30%; 3 = 31‐50%; 4 = 51‐70%; and 5 = ≥ 70% of the buffalograss leaf area with severe discoloration, or dead tissue. Highly significant differences were found among the genotypes and progeny for chinch bug damage. Among the genotypes, Legacy, Prestige, 184, 196, Bowie, NE 3297, NE 2769, and NE 2768 were moderately resistant with damage ratings of >1, but <3, while NE 2990, NE 2838, and 1-57-19 were moderately susceptible with damage ratings of ≥3, but <4. Among the progeny, one progeny (MP45) was highly resistant with a chinch bug damage rating of 1.0, 78 progeny (83%) had moderate resistance, with damage ratings of >1.0 and <3.0, 13 progeny (14%) were moderately susceptible with damage ratings ranging from 3.0 to 3.9, while only two were highly susceptible with damage ratings of ≥4.0. The significant variability among genotypes and progeny for chinch bug resistance indicates the ability to improve buffalograss resistance to chinch bugs through selection or hybridization of selected genotypes.

Keywords: Blissus occiduus; Buchloe dactyloides; plant resistance; turfgrass

Document Type: Research Article

DOI: http://dx.doi.org/10.1603/EC11153

Publication date: December 1, 2011

More about this publication?
  • Journal of Economic Entomology is published bimonthly in February, April, June, August, October, and December. The journal publishes articles on the economic significance of insects and is divided into the following sections: apiculture & social insects; arthropods in relation to plant disease; forum; insecticide resistance and resistance management; ecotoxicology; biological and microbial control; ecology and behavior; sampling and biostatistics; household and structural insects; medical entomology; molecular entomology; veterinary entomology; forest entomology; horticultural entomology; field and forage crops, and small grains; stored-product; commodity treatment and quarantine entomology; and plant resistance. In addition to research papers, Journal of Economic Entomology publishes Letters to the Editor, interpretive articles in a Forum section, Short Communications, Rapid Communications, and Book Reviews.
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