Toxic and repellent properties ofXylopia aethiopica(Dunal) A. Richard onTribolium castaneumHerbst infesting stored millets,Pennisetum glaucum(L.) R. Br.

Abstract

The toxicity and repellency of Xylopia aethiopica seed extract was investigated in the laboratory against Tribolium castaneum Herbst. Concentration and days after treatment (DAT) caused a significant increase in T. castaneum adult mortality with an interaction effect of both on mortality when filter paper was impregnated with X. aethiopica extract. At 0.2 ml/60 cm 2 extract, significant mortality was observed at three-seven DAT when compared with one DAT. At 0.4 ml/60cm 2 , 100% mortality was recorded at the lowest exposure period of one DAT. When 0.2 ml extract was applied to 5 g millet seeds, mortality at five-seven DAT was significantly higher than mortality observed in the control. Although repellency was dose-dependent, the percentage of T. castaneum that were repelled from treated filter paper was not significant. At 0.4 ml/60 cm 2 , Class II repellency (26.7%) was observed. The results suggest that X. aethiopica can only effectively control T. castaneum populations that have infested millet but do not prevent cross-infestation via repellency.

Bioactivity ofPiper guineenseSchum. & Thonn seed andMoringa oleiferaLam. leaf powder againstTrogoderma granariumEverts (Coleoptera: Dermestidae)

“…The effectiveness of the plant powder on the test beetle was exposure duration dependent. This agrees with Akinkurolere et al (2006) and Babarinde et al (2008). Adults were more susceptible to the treatments than the larvae.…”

“…This was because pirimiphos-methyl is a contact and fumigant chemical (Hill 1983) which was expected to cause effective control of the larval stage. Babarinde et al (2008) reported activity of pirimiphosmethyl against Sitophilus zeamais in stored maize. Since T. granarium larvae are known to diapause with long setae on their bodies, tolerance to the plant species could have been due to these physiological and morphological properties.…”

“…Though several works (Mbata et al 1995;El-Nadi et al 2001;Lale and Yusuf, 2001;Boeke et al 2004;Odeyemi and Ashamo 2005;Babarinde and Daramola 2006;Asawalam et al 2007;Babarinde et al 2008;Ndomo et al 2008;Babarinde and Adeyemo 2009) had been done on the use of plant materials in stored product protection, it is necessary to evaluate plant products in economic formulations which will be efficient. Plant powder formulation is cheap since organic solvents are not used.…”

Chemical Composition of the Essential Oil of Nigeria Grown Hoslundia opposita Vahl (Lamiaceae) Dried Leaves and Its Bioactivity against Cowpea Seed Bruchid

“…maculatus Fabricius , and Plodia interpunctella Hubner has also been reported . The toxicity of the EO which was both concentration‐ and exposure duration‐dependent agrees with previous studies on some stored product insects …”

Synergistic effect of spinosad with selected botanical powders as biorational insecticides against adults of Tribolium castaneum Herbst, 1797 (Coleoptera: Tenebrionidae)

“…Tribolium castaneum (Herbst) has been reported to be a major secondary pest of processed or damaged stored cereal products (Lorini and Filho et al, 2007;Babarinde and Adeyemo, 2010;Stejskal et al, 2014). Besides being known as a secondary pest of cereals, it has also been reported as a pest of plantain chips and yam flour .…”