Abstract | BACKGROUND: Black pecan aphid, Melanocallis caryaefoliae (Davis) (Hemiptera: Aphididae), feeding elicits localized chlorotic injury to pecan foliage [Carya illinoinensis (Wangenh.) K Koch] and apparent acceleration of leaf senescence and defoliation. The ability of certain plant growth regulators (PGRs) ( forchlorfenuron, gibberellic acid and aviglycine) to prevent M. caryaefoliae from triggering pecan leaf chlorosis and senescence-like processes was evaluated on two dates in both 2006 and 2007. Treatments were applied to orchard foliage and used in laboratory leaf-disc bioassays to assess possible reduction in aphid-elicited chlorosis and concomitant effects on aphid mortality and development. RESULTS: CONCLUSION: Certain PGRs possess the potential for usage on pecan to protect foliar canopies from M. caryaefoliae via changes in the susceptibility of the host leaf to senescence-like factors being introduced by feeding aphids. This protective effect on host foliage and the associated suppressive effect on development of feeding aphids might also be relevant to pest management programs on other aphid-crop systems in which aphid-elicited chlorosis and senescence-like processes can limit profitability.
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Authors | Ted E Cottrell, Bruce W Wood, Xinzhi Ni |
Journal | Pest management science
(Pest Manag Sci)
Vol. 66
Issue 11
Pg. 1236-42
(Nov 2010)
ISSN: 1526-4998 [Electronic] England |
PMID | 20715019
(Publication Type: Journal Article, Research Support, Non-U.S. Gov't)
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Copyright | Published 2010 by John Wiley & Sons, Ltd. |
Chemical References |
- Gibberellins
- Phenylurea Compounds
- Plant Growth Regulators
- Pyridines
- gibberellic acid
- N-(2-chloro-4-pyridyl)-N'-phenylurea
- aminoethoxyvinylglycine
- Glycine
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Topics |
- Animals
- Aphids
(physiology)
- Carya
(drug effects, parasitology)
- Feeding Behavior
- Gibberellins
(pharmacology)
- Glycine
(analogs & derivatives, pharmacology)
- Pest Control
- Phenylurea Compounds
(pharmacology)
- Plant Diseases
(parasitology)
- Plant Growth Regulators
(pharmacology)
- Pyridines
(pharmacology)
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