@article{barbour_brandenburg_1995, title={IMPACT OF TYPE AND TIMING OF SOUTHERN CORN-ROOTWORM TREATMENTS ON PREDACEOUS ARTHROPODS IN PEANUT}, volume={30}, ISSN={["0749-8004"]}, DOI={10.18474/0749-8004-30.4.447}, abstractNote={At-flowering and at-pegging treatments of soil-applied insecticides for southern corn rootworm, Diabrotica undecimpunctata howardi Barber, control were examined to determine if type and/or timing of insecticide affected the abundance of predaceous arthropods in reproductive-stage peanuts. Orius insidiosus (Say) and spiders comprised the majority of predators captured during the study. Effects of timing were variable, but indicated that earlier, at-flowering pesticide application may allow for better re-establishment of some predators (e.g., O. insidiosus), and for the total number of predators, than later, at-pegging pesticide applications. There was no consistent effect of chlorpyrifos or fonophos applied at flowering, or chlorpyrifos or ethoprop applied at pegging, on predator abundance in reproductive-stage peanuts.}, number={4}, journal={JOURNAL OF ENTOMOLOGICAL SCIENCE}, author={BARBOUR, JD and BRANDENBURG, RL}, year={1995}, month={Oct}, pages={447–462} }
 @article{barbour_farrar_kennedy_1993, title={Interaction of Manduca sexta resistance in tomato with insect predators of Helicoverpa zea}, volume={68}, ISSN={["0013-8703"]}, DOI={10.1111/j.1570-7458.1993.tb01697.x}, abstractNote={AbstractResistance in accession PI 134417 of Lycopersicon hirsutum f. glabratum to Manduca sexta L. results from the presence of the methyl ketones 2‐tridecanone and 2‐undecanone in the type VI trichome glands on foliage of these plants. Short (24 h) and long term (neonate to adult) laboratory experiments using M. sexta‐resistant and susceptible foliage and methyl ketone treated filter paper disks were conducted to evaluate the direct (plant‐mediated) and indirect (prey‐mediated) effects of this resistance on two predators of Helicoverpa zea eggs, Coleomegilla maculata (DeGeer) and Geocoris punctipes (Say). Direct effects of resistance were manifest as reduced egg consumption and increased mortality for both predators. Indirect effects were manifest as reduced egg consumption by G. punctipes, but were not observed for C. maculata. Results of experiments using methyl ketone‐treated filter paper disks instead of foliage were similar.}, number={2}, journal={Entomologia Experimentalis et Applicata}, author={Barbour, J.D. and Farrar, R.R., Jr. and Kennedy, G.G.}, year={1993}, month={Aug}, pages={143–155} }
 @article{barbour_farrar_kennedy_1991, title={Interaction of fertilizer regime with host‐plant resistance in tomato}, volume={60}, ISSN={0013-8703 1570-7458}, url={http://dx.doi.org/10.1111/j.1570-7458.1991.tb01549.x}, DOI={10.1111/j.1570-7458.1991.tb01549.x}, abstractNote={AbstractThe effect of fertilizer regime on trichome‐ and lamellar‐based resistance in the wild tomato species, Lycopersicon hirsutum f. glabratum C. H. Mull accession PI 134417, to three insect pests of tomato, the tobacco hornworm, Manduca sexta (L.), the Colorado potato beetle, Leptinotarsa decemlineata (Say), and the tomato fruitworm, Heliocoverpa zea (Boddie), was examined. Increasing the rate at which NPK fertilizer was applied, from 1.8 to 19.6 g/plant/week, reduced the trichome‐based resistance of PI 134417 to M. sexta and L. decemlineata by lowering both the density of type VI (sensu Luckwill, 1943) glandular trichomes and the amount of 2‐tridecanone contained in the tips of these trichomes. 2‐Tridecanone is a toxic methyl‐ketone responsible for glandular trichome‐mediated resistance in PI 134417 to M. sexta and L. decemlineata. A similar increase in the application rate of NPK fertilizer reduced the lamellar‐based resistance of PI 134417 to L. decemlineata and H. zea. The meachanisms for this reduction of resistance are unknown, but may be related to improved nutritional quality of hosts at higher fertilizer regimes.}, number={3}, journal={Entomologia Experimentalis et Applicata}, publisher={Wiley}, author={Barbour, J. D. and Farrar, R. R., Jr. and Kennedy, G. G.}, year={1991}, month={Sep}, pages={289–300} }
 @article{barbour_kennedy_1991, title={Role of steroidal glycoalkaloid ?-tomatine in host-plant resistance of tomato to colorado potato beetle}, volume={17}, ISSN={0098-0331 1573-1561}, url={http://dx.doi.org/10.1007/bf01395604}, DOI={10.1007/BF01395604}, abstractNote={The role of the steroidal glycoalkaloid α-tomatine in the hostplant resistance of tomato to the Colorado potato beetle,Leptinotarsa decemlineata (Say) was examined in short- (24 hr; using first- and fourth-instar larvae) and long-term (first-instar larvae reared through the prepupal stage) feeding experiments. Consumption rate, growth rate, efficiency of conversion of ingested food to body mass, and survival were compared forL. decemlineata provided foliage from susceptible (Lycopersicon esculetum Mill. cv. Walter), resistant (L. hirsutum f.Glabratum C.H. Mull accession PI 134417), and F1 hybrid plants. Values obtained for dietetic indices were regressed against corresponding values for α-tomatine content of foliage provided to larvae. Differences in dietetic indices could not be attributed to variation in foliar α-tomatine content despite a long-standing literature showing theex planta α-tomatine inhibits feeding and growth byL. decemlineata.}, number={5}, journal={Journal of Chemical Ecology}, publisher={Springer Science and Business Media LLC}, author={Barbour, J. D. and Kennedy, G. G.}, year={1991}, month={May}, pages={989–1005} }