The Effect of Wheat Varieties on the Biological Attributes of Corn Leaf Aphid, Rhopalosiphum maidis (Fitch) (Hemiptera: Aphididae) under Laboratory Conditions

AbstractThe effects of various levels of infestation of the corn leaf aphid, Rhopalosiphum maidis (Fitch), on yield of field corn were examined from 1965 to 1970 inclusive when all plants whose yield might have been influenced by factors other than aphid feeding were excluded from the data. A possible relationship between moisture stress in plants and degree of aphid injury was also investigated.A light infestation (maximum of 400 aphids on the tassel) caused average yield reductions up to 8.3% when plants were under moisture stress, but nil to negligible losses when moisture was adequate. Moderate infestations (many hundreds of aphids on part of the tassel) produced average losses up to 34.8% under drought conditions and up to 11.8% when moisture was abundant. Severe infestations (many hundreds of aphids on most of the tassel) caused average yield reductions ranging from 43.2 to 91.8% when plants were under water stress and up to 58.9% even with abundant moisture. Very severely infested plants (many hundreds on all of the tassel and whorl leaves) were usually barren or had ears with just a few kernels regardless of moisture conditions.Most injury from aphid feeding appeared to occur before and during pollination. No particular combination of temperature and rainfall favored aphid buildup.

Download Full-text

Herbivore-induced emissions of maize volatiles repel the corn leaf aphid, Rhopalosiphum maidis

Entomologia Experimentalis et Applicata ◽

10.1046/j.1570-7458.1998.00315.x ◽

1998 ◽

Vol 87 (2) ◽

pp. 133-142 ◽

Cited By ~ 151

Author(s):

Marco L. Bernasconi ◽

Ted C. J. Turlings ◽

Lara Ambrosetti ◽

Paolo Bassetti ◽

Silvia Dorn

Keyword(s):

Rhopalosiphum Maidis ◽

Corn Leaf Aphid

Download Full-text

Effects of Host Plants Reared under Elevated CO2 Concentrations on the Foraging Behavior of Different Stages of Corn Leaf Aphids Rhopalosiphum maidis

Insects ◽

10.3390/insects10060182 ◽

2019 ◽

Vol 10 (6) ◽

pp. 182 ◽

Cited By ~ 3

Author(s):

Yu Chen ◽

Clément Martin ◽

Junior Corneille Fingu Mabola ◽

François Verheggen ◽

Zhenying Wang ◽

...

Keyword(s):

Climate Change ◽

Foraging Behavior ◽

Elevated Co2 ◽

Atmospheric Carbon Dioxide ◽

Environmental Concern ◽

Hordeum Vulgare L ◽

Rhopalosiphum Maidis ◽

Co2 Concentrations ◽

Corn Leaf Aphid ◽

Carbon Dioxide Co2

Climate change is a major environmental concern and is directly related to the increasing concentrations of greenhouse gases. The increase in concentrations of atmospheric carbon dioxide (CO2), not only affects plant growth and development, but also affects the emission of plant organic volatile compounds (VOCs). Changes in the plant odor profile may affect the plant-insect interactions, especially the behavior of herbivorous insects. In this study, we compared the foraging behavior of corn leaf aphid (Rhopalosiphum maidis) on barley (Hordeum vulgare L.) seedlings grown under contrasted CO2 concentrations. During the dual choice bioassays, the winged and wingless aphids were more attracted by the VOCs of barley seedlings cultivated under ambient CO2 concentrations (aCO2; 450 ppm) than barley seedlings cultivated under elevated CO2 concentrations (eCO2; 800 ppm), nymphs were not attracted by the VOCs of eCO2 barley seedlings. Then, volatile compositions from 14-d-old aCO2 and eCO2 barley seedlings were investigated by GC-MS. While 16 VOCs were identified from aCO2 barley seedlings, only 9 VOCs were found from eCO2 barley seedlings. At last, we discussed the potential role of these chemicals observed during choice bioassays. Our findings lay foundation for functional response of corn leaf aphid under climate change through host plant modifications.

Download Full-text

Toxicological Study of Dimlor (A Mixture of Dimethoate and Chlorpyrifos) Against Corn Leaf Aphid, Rhopalosiphum maidis. (Fitch) under Different Micro-climatic Conditions

Pakistan Journal of Biological Sciences ◽

10.3923/pjbs.1999.315.317 ◽

1999 ◽

Vol 2 (2) ◽

pp. 315-317 ◽

Cited By ~ 1

Author(s):

Seema Tahir . ◽

Tahir Anwar . ◽

Mohammad Rafiq Khan . ◽

Shaugafta Aziz . ◽

Mohammad Ilyas . ◽

...

Keyword(s):

Climatic Conditions ◽

Toxicological Study ◽

Rhopalosiphum Maidis ◽

Corn Leaf Aphid

Download Full-text

LACK OF CLONAL VARIATION AMONG CANADIAN POPULATIONS OF THE CORN LEAF APHID, RHOPALOSIPHUM MAIDIS FITCH (HOMOPTERA: APHIDIDAE)

The Canadian Entomologist ◽

10.4039/ent127623-5 ◽

1995 ◽

Vol 127 (5) ◽

pp. 623-629 ◽

Cited By ~ 6

Author(s):

J.C. Simon ◽

P.D.N. Hebert ◽

C. Carillo ◽

R. De Melo

Keyword(s):

Genetic Diversity ◽

Mitochondrial Dna ◽

North America ◽

North Africa ◽

Allozyme Variation ◽

Clonal Variation ◽

Allozyme Analysis ◽

Rhopalosiphum Maidis ◽

Mtdna Variation ◽

Corn Leaf Aphid

AbstractThe extent of allozyme variation and the amount of genetic divergence were assessed among populations of the aphid Rhopalosiphum maidis in Ontario. Allozyme analysis of individuals from 12 sites revealed no polymorphism for 32 loci. In addition, the extent of karyotypic, allozyme, and mitochondrial DNA (mtDNA) variation was examined for clones from North America, Europe, and North Africa. As previously noted, chromosome number varied in relation to the host-plant on which aphids were collected, but neither allozyme nor mtDNA patterns allowed discrimination among clones. Further work is needed to determine whether the lack of genetic diversity in R. maidis is linked with its recent introduction to North America or with its loss of a sexual phase.

Download Full-text