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Published yearly: 

4 Issues


ISSN: 2320-964X (Online) 

ISSN: 2320-7817  (Print)



Dr. Santosh Pawar 




Int. Journal of Life Sciences, 2017; 5(1):10- 20  |    Available online, 31 March, 2017

Evaluation of some botanicals oils for the management of Maize weevil, Sitophilus zeamais Motsch. (Coleoptera: Curculionidae)


Kifle Gebreegziabiher1, Mulatu wakgari2 and Muluken Goftishu2

1Maythebri Shire Agricultural Research Center, Tigray, Ethiopia. 2 Haramaya University, Haramaya, Ethiopia.

*Corresponding author. E-mail:

Received: 09.02.2017 | Accepted: 21.03.2017 | Published : 31.03.2017

The study was conducted at the Plant Protection Laboratory of Haramaya University at a controlled environment of 28±20C and 75±5% R.H. The objectives were to determine the effective doses of neem seed powder, citrus peel powder and their oil extracts and to evaluate some improved varieties and land races of sorghum for their resistance to maize weevil. Treatments were arranged in CRD replicated four times. Fifty unsexed 3-6 days old maize weevil adults were introduced to each glass jar containing 0.1kg muyra-2 seed. In the first botanical study, neem seed and citrus peel oils each at five rates of 0.25, 0.5, 0.75, 1, 1.5 ml, Malathion 5% dust and acetone treated control were evaluated. The results indicated that, all of the parameters analyzed at all rates of the botanical oils showed significant difference over the acetone treated control except for F1 progeny emergence and weight loss at 0.25 ml NSO. The botanical oils at rates of 0.75, 1 and 1.5 ml NSO and 1.5 ml CPO per 100 g sorghum produced adult weevil mortality in the range of 91.25-100% and seed protection of 83-100% similar to that of the positive control. For the same botanical oil rates weevil emergence, seed damage and weight losses were statistically at par with Malathion 5% dust. However sorghum seeds treated with botanical oils showed significant reduction in germination compared to Malathion 5% dust. Further research on the botanical oils for long period of time under farmer’s storage structure could be necessary.


Key words: Botanicals, maize weevil, sorghum, management



Editor: Dr. Arvind Chavhan


Cite this article as:

Kifle Gebreegziabiher, Mulatu wakgari and Muluken Goftishu (2017) Evaluation of some botanicals oils for the management of Maize weevil, Sitophilus zeamais Motsch. (Coleoptera: Curculionidae), International J. of Life Sciences, 5  (1): 10-20.




The completion of this study would have not been realized without the help of others and I would like to take this opportunity to thank everyone who helped me with this study. First I would like to express my thanks and appreciation to Mulatu wakgari (PhD), Mr. Muluken Goftishu, Mashila Dejjene (PhD),Tesfay Belay (PhD) and Firdu Azerefegn(PhD)  for their critical review of the paper. It has helped me to improve the quality of the report and compilation of my work. The research work reported in this paper in collaboration with my home institution Tigray Agricultural research Institute, Mekelle Agricultural research Center. I am very grateful to, Tigray Agricultural Research Institute for the financial support and Haramaya University for free laboratory material support.


Conflicts of interest: The authors stated that no conflicts of interest.



Copyright: © 2017 | Author(s), This is an open access article under the terms of the Creative Commons Attribution-Non-Commercial - No Derivs License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non-commercial and no modifications or adaptations are made.


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