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Publication Type:
| Report |
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. |
Publishing Information: | [Lincoln, NE]: University of Nebraska |
# of Pages: | 1 |
Keywords: | TIC Keywords: Bouteloua dactyloides; Susceptibility; Microscopy; Insect resistance; Pseudococcus; Leaf pubescence; Spanogonicus albofasciatus; Insect infestation; Trials
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Geographic Terms: | Nebraska |
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." |
Language: | English |
References: | 0 |
| 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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