11 research outputs found
Infection of Kissing Bugs with Trypanosoma cruzi, Tucson, Arizona, USA
A survey of triatomine insects found that 41.5% were infected with the causative agent of Chagas disease
Oviposition preference and larval performance and behavior of Trichoplusia ni (Lepidoptera: Noctuidae) on host and nonhost plants
We investigated the female oviposition preference and larval performance and behavior of Trichoplusia ni (Hubner) on cabbage, tomato, soybean (host plants), and wormseed (nonhost plant) in laboratory experiments. In addition, we investigated the role of trichomes in the oviposition of females. Females oviposited more often on cabbage than on tomato, soybean, or wormseed plants. Tomato was the second most preferred plant, followed by soybean and wormseed. Neonate larvae gained more weight on cabbage and tomato than on soybean or wormseed, while second-instar larvae grew better on cabbage than on tomato, soybean, or wormseed. The least growth of neonate larvae occurred on wormseed plants. The orientation of neonate and second-instar larvae to cabbage, tomato, soybean, and wormseed did not differ significantly. Neonate larvae settled equally on leaf discs of cabbage, tomato, soybean, and wormseed, while most second-instar larvae settled on leaf discs of cabbage in comparison with the other plants after 24 h of release. The foliar area consumed by neonate larvae was quite similar among plants, but second-instar larvae consumed more cabbage than tomato, soybean, or wormseed. Comparing different types of leaves, females oviposited more often on mature than young leaves of tomato, soybean, and wormseed. In contrast, females did not show any preference for ovipositing on young or mature leaves of cabbage. In general, we found that the density or length of nonglandular and glandular trichomes of tomato, soybean, and wormseed plants negatively affected oviposition of T. ni females.Fil: Coapio, G. G.. El Colegio de la Frontera Sur; MĂ©xicoFil: Cruz LĂłpez, L.. El Colegio de la Frontera Sur; MĂ©xicoFil: Guerenstein, Pablo Gustavo. Provincia de Entre RĂos. Centro de Investigaciones CientĂficas y Transferencia de TecnologĂa a la ProducciĂłn. Universidad AutĂłnoma de Entre RĂos. Centro de Investigaciones CientĂficas y Transferencia de TecnologĂa a la ProducciĂłn. Consejo Nacional de Investigaciones CientĂficas y TĂ©cnicas. Centro CientĂfico TecnolĂłgico Conicet - Santa Fe. Centro de Investigaciones CientĂficas y Transferencia de TecnologĂa a la ProducciĂłn; ArgentinaFil: Malo, Edi A.. El Colegio de la Frontera Sur; MĂ©xicoFil: Rojas, J. C.. El Colegio de la Frontera Sur; MĂ©xic
Effect of elevated atmospheric CO2 on oviposition behavior in Manduca sexta moths
Moths can detect changes in environmental carbon dioxide (CO2) with extremely high sensitivity, but the role of CO2 in the biology of these and other insects is not well understood. Although CO2 has been demonstrated to influence egg-laying (oviposition