+ Site Statistics
+ Resolve Accession
+ Subscribe to Site Feeds
EurekaMag Most Shared ContentMost Shared
EurekaMag PDF Full Text ContentPDF Full Text
+ PDF Full Text
Request PDF Full TextRequest PDF Full Text
Submit PDF Full TextSubmit PDF Full Text
+ Follow Us
Follow on FacebookFollow on Facebook
Follow on TwitterFollow on Twitter
Follow on Google+Follow on Google+
Follow on LinkedInFollow on LinkedIn

+ Translate

Canopy structure in soybean monocultures and soybean-sorghum mixtures: impact on aphid (Homoptera: Aphididae) landing rates

, : Canopy structure in soybean monocultures and soybean-sorghum mixtures: impact on aphid (Homoptera: Aphididae) landing rates. Environmental Entomology 21(3): 542-548

Aphid landing rates were monitored with horizontal mosaic green pan traps in monocultures of soybean, Glycine max (L.) Merrill, and in additive mixtures of soybean with dwarf or tall isolines of sorghum, Sorghum bicolor (L.) Moench. Rhopalosiphum maidis (Fitch) colonized sorghum whorls and was the major species caught in pan traps. Weekly aphicide spot applications to sorghum whorls, starting at 36 d after planting, did not suppress R. maidis colonies significantly until after the third application. Landing rates of R. maidis alatae were similar in treated and untreated crop mixtures. The lack of a significant difference may have resulted from immigration of R. maidis alatae from outside the experimental field but inefficient colony suppression may have produced similar results. Mixed cropping reduced landing rates of Aphis gossypii Glover, Aphis helianthi complex, and Lipaphis erysimi (Kaltenbach) on sorghum plants, and R. maidis on soybean plants. Generally, landing rates were equally reduced in the mixtures with tall or dwarf sorghum. The percentage of ground covered by vegetation, which was less in monocultures than in mixtures, proved to be more important than crop height in reducing aphid landing rates. All aphid species landed randomly on soybean and sorghum plants within dwarf sorghum mixtures. However, in tall sorghum mixtures Aphis nerii Boyer de Fonscolombe and A. gossypii preferred to land on soybean whereas Aphis spiraecola Patch landed more often on sorghum. Landing R. maidis alatae did not show a preference for sorghum or soybean in the crop mixtures. Different sensitivities to microclimatic conditions may explain these behavioral patterns.

(PDF same-day service: $19.90)

Order PDF Full Text


Click here to order any other PDF Full Text

Accession: 002042690

DOI: 10.1093/ee/21.3.542

PDF Full Text: Submit

Submit PDF Full Text

No spam - Every submission is manually reviewed

Due to poor quality, we do not accept files from Researchgate

Submitted PDF Full Texts will always be free for everyone
(We only charge for PDFs that we need to acquire)

Select a PDF file:

Other references

Lewis, D.E.; Utecht, R.E.; Judy, M.M.; Matthews, J.L., 1995: Fluorescent method for monitoring oil degradation. Official Gazette of the United States Patent & Trademark Office Patents 1181(1): 401, Dec 5

Buresh, J.Sootsman.; Woodward, A.L., 2006: Infants track action goals within and across agents. The ability to understand that goals and other intentional relations are attributes of individual people is of fundamental importance to social life. It enables us to predict and interpret actions on-line by relating a person's prior and cur...

Singh, N.; Choudhury, D.Roy.; Tiwari, G.; Singh, A.Kumar.; Kumar, S.; Srinivasan, K.; Tyagi, R.K.; Sharma, A.D.; Singh, N.K.; Singh, R., 2016: Genetic diversity trend in Indian rice varieties: an analysis using SSR markers. The knowledge of the extent and pattern of diversity in the crop species is a prerequisite for any crop improvement as it helps breeders in deciding suitable breeding strategies for their future improvement. Rice is the main staple crop in India w...

Bagga S.; Rajasekhar V.K.; Guha Mukherjee S.; Sopory S.K., 1985: Enhancement in the formation of shoot initials by phytochrome in stem callus cultures of brassica oleracea var botrytis. Dark grown (20-day old) callus obtained from explants of B. oleracea var. botrytis formed shoot initials 12 days after transfer to light. However, if 15-day old dark grown callus was exposed to continuous white light, the production of shoot initi...

Strickholm Peter; Ortoleva Peter; Merino Enrique, 1983: Kinetics of the spontaneous generation of metamorphic banding through pressure and dislocation-induced dissolution. Abstracts with Programs - Geological Society of America 15(6): 700

Nounaka, O.; Matsumura, K.; Takamatsu, T.; Maru, A.; Yamashiro, K., 2001: Small cell carcinoma of the ureter: A case report. A 86-year-old man visited our hospital with the chief complaint of gross hematuria, pollakisuria and residual urine sensation. Retrograde pyelography and ureteroscopic examination revealed a tumor in the right lower ureter. Right nephroureterectom..., J.B.; Bladier, C.; Griffiths, P., 1998: Mice with homozygous null mutation for the most abundant glutathione peroxidase, Gpx1, show increased susceptibility to the oxidative stress-inducing agents paraquat and hydrogen peroxide. The Journal of Biological Chemistry 273(35): 528-36

Randall, JE.; Yamakawa, T., 1988: A new species of the labrid fish of the genus Hologymnosus from the western Pacific, with notes on H longipes. Revue Francaise d'Aquariologie Herpetologie, 151: 25-30

Patterson, M.M.; Gellman, M.D., 1977: Effects of superior cervical ganglionectomy on classical conditioning of the rabbit nictitating membrane response. Journal of the American Osteopathic Association 76(5): 377-378

Prokopov, P.E.; Nikonchik, P.I., 1973: A comparative study of legumes grown on dernopodzolic clay loam soils in central regions of the Belorussian SSR. In trials during 3 years to compare productivity of several legumes in the Belorussian SSR, the highest fresh fodder yields were given by lupin and serradella and the lowest by peas; vetch and peavine [Lathyrus sp.] gave intermediate yields and we...