Full TGIF Record # 37478
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Publication Type:
Author(s):Johnson-Cicalese, Jennifer
Title:Evaluation of buffalograss leaf pubescence and its effect on mealybug host selection
Source:Turfgrass Research Report for 1994 [Nebraska]. 1994, p. 33.
# of Pages:1
Publishing Information:[Lincoln, NE]: University of Nebraska
Keywords:TIC Keywords: Bouteloua dactyloides; Susceptibility; Microscopy; Insect resistance; Pseudococcus; Leaf pubescence; Spanogonicus albofasciatus; Insect infestation; Trials
Abstract/Contents:"Scanniong electron microscopy (SEM) and light microscopy were used to evaluate buffalograss leaf pubescence and its possible effect on susceptibility to mealybugs. A range of trichome densities was found, with two highly susceptible selections, 85-97 and '378' averaging as many as 8.7 and 10.9 trichomes per mm², while two highly resistant selections, '609' and 'Prairie' had 0 and 0.1 trichomes per mm². Pubescence ratings of the whole plant (1-6 rating scale) were highly correlated with trichome counts, indicating the relative accuracy of the more time-efficient pubescence rating technique. SEM observations of mealybugs on buffalograss leaves suggest that pubescence may facilitate oviposition by providing a framework for the waxy filamentous ovisac, and/or provide a foothold for mealybug nymphs. In preliminary choice trials, mealybugs did not exhibit a preference for the susceptible 85-97. Eviedence suggests that mealybug resistance mechanisms may operate primarily on a whole plant basis or may involve interactions with parasitoid wasps."
Geographic Terms:Nebraska
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Johnson-Cicalese, J. 1994. Evaluation of buffalograss leaf pubescence and its effect on mealybug host selection. Turfgrass Res. Rep. Nebr. p. 33.
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