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Start Over Creator Prokopy, Ronald J.

1. Influence of barometric pressure on odor discrimination and oviposition by adult plum curculios (Coleoptera: Curculionidae)

Creator:
Leskey, Tracy C. and Prokopy, Ronald J.
Type:
article, model:article, and TEXT
Subject:
Conotrachelus nenuphar, plum curculio, barometric pressure, oviposition, and olfactory odor discrimination
Language:
English
Description:
We conducted laboratory experiments to elucidate the influence of barometric pressure on odor discrimination and oviposition and feeding behavior of adult female plum curculios, Conotrachelus nenuphar (Herbst). Barometric pressure had a significant effect on Response Index values (used as a measure of odor discrimination); odor discrimination of hexane-extracted McIntosh fruit volatiles was high when barometric pressure was high. Barometric pressure also had a significant effect on oviposition as females oviposited more during periods of low barometric pressure on a favored host fruit (wild plum). Observed feeding activity of females was not influenced by barometric pressure.
Rights:
http://creativecommons.org/publicdomain/mark/1.0/ and policy:public

2. Serratia marcescens as a bacterial pathogen of Rhagoletis pomonella flies (Diptera: Tephritidae)

Creator:
Lauzon, Carol R., Bussert, Teresa G., Sjogren , Robert E., and Prokopy, Ronald J.
Type:
article, model:article, and TEXT
Subject:
Tephritidae, apple maggot fly, Rhagoletis pomonella, microorganisms, Serratia marcescens, Pseudomonas, mortality, and disease
Language:
English
Description:
A nonpigmenting strain of Serratia marcescens Bizio isolated from dead and apparently diseased wild apple maggot flies, Rhagoletis pomonella (Walsh), was shown to be pathogenic to healthy apple maggot flies upon ingestion. The microorganism was detected in live adult alimentary canal organs four days post ingestion but produced death in some flies within 24 h when flies fed on a cell concentration of 4.7 × 104 cfu/ml and within 8 h when flies fed on filter-sterilized culture medium that previously contained a 21 h culture of S. marcescens. Increasing the cell concentration 10,000 fold did not lead to an increased rate of kill. Young flies (7-10 days old) were more susceptible to infection leading to death than were older flies (21-28 days old). The potential use of S. marcescens cells as control agents against apple maggot flies is negated by their pathogenicity to vertebrates; however, the potential use of toxic compounds produced by this strain of S. marcescens is discussed.
Rights:
http://creativecommons.org/publicdomain/mark/1.0/ and policy:public