Comparative Effects of Garlic (Allium Sativum) Bulb and Bulb Coat Powder on Maize Weevils (Sitophilus Zeamais)

Ishaya, M.; John, W. C.; Oke, OA; Chomini, M.S.; Oladejo, A. O.; Ihum, T. A.; Olorundare, O.O.; Ukanyirioha, C.J.; Ayorinde, J.O.; Sikiru, G.K.

doi:10.18551/rjoas.2021-08.10

Cited by 1 publication

(1 citation statement)

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“…Furthermore, C. maculatus and S. zeamais were sensitive to extracts of Lavandula alba, Lavandula stoechas and Citrus sinensis (Oyedeji et al, 2020;Patiño-Bayona et al, 2021). Data obtained showed incongruences with reports on strong sensitivity of S. zeamais to powder formulations of Jatropha curcus, Euphobia basalmifer and Lawsonia infermis (Suleiman et al, 2012;Suleiman and Suleiman, 2014;Ishaya et al, 2021). However, these results agree with the submission of Vilarinho et al (2016) that extracts from Azadirachta indica and Cymbopogon winterianus presented low insect killing potential compared to deltamethrin or chlorpyrifos.…”

Section: Mortality Of Adult Insectssupporting

confidence: 63%

Evaluation of Toxicity of Some Tropical Flora, Clay and Permethrin against Sitophilus zeamais Motsch. on Stored Maize Grains

Emeasor

Nwakanma

Enyiukwu

2022

Caraka Tani J. Sustain. Agric.

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Weevil (Sitophilus zeamais Motsch.) is a vital arthropod pest of maize (Zea mays L.) grains and flours in traditional storage systems. The pest bore holes into stored grains reducing their nutrient contents germination potentials and contaminating produce with frass. Its control using synthetic insecticides such as permethrin is being downplayed due to eco-mammalian toxicity from pesticide residues. Therefore, this study evaluates the toxicities of some indigenous plants Ageratum conyzoides L., Cymbopogon nardus L., clay and permethrin, under laboratory conditions to the insect pest. Maize grains weighing 50 g were treated with the plant powders and the synthetic insecticide at five different levels 0.00; 1.25; 2.50; 3.75 and 5.00 g. Subsequently, 10 adult weevils in each vial were used to infest the 50 g maize grains. Each plant powder and permethrin's effectiveness was assessed by recording weevil mortality at 5, 7, 14, 21 and 28 days post-treatment. The damage indices recorded by the weevil perforation index (WPI), percentage of perforated and unperforated grains, and weight loss percentage were also considered. Permethrin proved most toxic, followed by clay at 5.00 g among all the treatments. A. conyzoides and C. nardus were less effective in controlling S. zeamais. In conclusion, clay can be used in the integrated management of S. zeamais to minimize synthetic insecticides.

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