Abstract The cereal aphids Rhopalosiphum padi L. are serious pests on grain crops, reducing the quality and yield by direct feeding damage virus transmission. changes in physiological biochemical parameters of two wheat cultivars under aphid stress were investigated to understand aphid-resistance mechanisms. activity levels phenylalanine ammonia-lyase (PAL), peroxidase (POD), tyrosine (TAL), Ca...

Abstract Background The life history and predation rate of the ladybird beetle, Harmonia dimidiata Fabricius (Coleoptera: Coccinellidae) were compared at four different temperatures (16, 20, 24, 28 °C). beetles fed on bird cherry-oat aphid, Rhopalosiphum padi Linnaeus (Hemiptera: Aphididae) investigated 70 ± 10% RH with a photoperiod 14:10 h (L:D). Results reproductive rates ( R 0 ) 20.07, 51.3...

Abstract Background Maize dwarf mosaic virus (MDMV), a member of the genus Potyvirus , infects maize and is non-persistently transmitted by aphids. Several plant viruses have been developed as tools for gene expression silencing in plants. The capacity MDMV both were examined. Results Infectious clones an Ohio isolate MDMV, OH5, obtained, engineered only, simultaneous marker virus-induced (VIGS...

Plant viruses, and aphids as their vectors, are limiting factors in sugar beet production. Viral plant diseases currently impossible to treat but knowing the flight patterns of can help reducing number potential virus vectors. Monitoring aphid activities fields was done using yellow water traps from April end November. During two years investigation, a total 5514 specimens 75 different taxa wer...