Solutions of four moss powders, namely: Calymperes afzelii Sw., Thuidium gratum (P. Beauv.) Jaeg., Bryum coronatum Schwaegr. and Barbula lambarenensis (Hook) Spreng., were evaluated for insecticidal activity against maize stem borers. The aqueous solutions were smeared periodically on mature maize plants in the field. All mosses tested showed some toxic activity against the established maize stem borers, deterrence regarding further infestation and some influence on the distribution of the borers. C. afzelii and B. coronatum showed encouraging toxic activities, deterrent activities and promptness that were better or just as good as with Tricel, the control inorganic insecticide. The order of activity of the moss solutions was C. afzelii> B. coronatum >T. gratum= B. lambarenensis. The incidence of stem borer in the most preferred internode, i.e. III, was reduced significantly by C. afzelii, T. gratum and B. coronatum treatments, while B. lambarenensis like, Tricel, restricted the incidence of borer holes to internodes III and IV. The advantages proffered by the window of utilizing mosses as pesticide, namely: availability, safety, low cost, ease of application, as well as, the disadvantages, i.e. laborious serial repetitions, was highlighted.
Ande, A. T.; Wahedi, J. A.; and Fatoba, P. O.
"Biocidal Activities of Some Tropical Moss Extracts Against Maize Stem Borers,"
Ethnobotanical Leaflets: Vol. 2010
, Article 11.
Available at: http://opensiuc.lib.siu.edu/ebl/vol2010/iss4/11