Susceptibility of maize genotypes to Rhyzopertha dominica (F.)

Abstract

This work examined the survival of Rhyzopertha dominica on maize kernels differing either for specific traits or for their genetic background. Maize traits comprised endosperm starch composition, and accumulation of pigments, i.e., carotenoids and anthocyanins, in the aleurone, while maize genotypes included the B73 reference line, the high oil content RAlexo line and the commercial variety Zea mays everta (popcorn). Kernels of the different genotypes were classified according to the endosperm texture. The number of adults of R. dominica developing from neonate larvae on both whole and sectioned kernels was measured. Differences were only observed in experiments with whole kernels. The lowest value was observed for the B73 line, and the highest for the popcorn variety. These two genotypes have the lowest and highest proportions of vitreous endosperm, respectively. In our experimental conditions, variations in the insect attack were observed in different lines, thus indicating that the insect-kernel interaction is influenced by quantitative more than single-gene traits.

Acceptance and utilization efficiency of a purple durum wheat genotype by Sitophilus granarius (L.)

“…Development of resistant wheat varieties to insect attacks during wheat grain storage is one of the most promising low-impact alternatives to insecticides in the management of stored grain pests 32 . Therefore, several studies aimed to develop antifeedant-based control means 44 as well as to identify new possible sources of resistance to the stored-product pests useful in breeding programs 68 – 71 . For instance, the results of bioassay using transgenic wheat plants, containing a modified avidin gene, challenged with granary weevil revealed 100% mortality of the insects showing high levels of resistance 72 .…”

Effect of Maize Varieties on some Biological Aspects of the Lesser Grain Borer Rhyzopertha dominica (Bostrichidae: Coleoptera).

“…The larvae and adults of R. dominica feed on the grains. The feeding not only causes quantitative damage to the grains, but also facilitates the infestation of these grains with other secondary pests and fungi, which finally affect the quality of these grains (Arthur et al, 2012 andLocatelli et al, 2019). In addition to the severity of the infestation in the grains, which may result in the presence of holes in the grains, only a thin cover of the grain remains (Vardeman et al, 2007).…”

“…The maize variety had high influence on some biological features of R. dominica (Singh and Pandey,1977;Locatelli et. al., 2019).…”

Physicochemical Properties of Sugarcane Cultivars Affected Life History and Population Growth Parameters of Sesamia nonagrioides (Lefebvre) (Lepidoptera: Noctuidae)

“…The quality of host plants can influence the life history, population growth, oviposition preference, and feeding performance of insect pests [ 22 , 23 ]. Plant physicochemical properties including primary and secondary metabolites, as well as trichome density, tissue hardness, and moisture content can determine the oviposition behavior and population performance of insect pests [ 24 , 25 , 26 , 27 , 28 ]. Therefore, study of these parameters, as resistance indices, could be useful in the identification of resistant cultivars for use in IPM programs [ 29 , 30 , 31 , 32 ].…”