Segnou et al
Greener Journal of Agricultural Sciences Vol. 3 (1), pp.012-020, January 2013
Effect of Chemical Treatments on Pests and Diseases of Pepper (Capsicum annuum L.)
Segnou Jean1*, Amougou Akoa2, Youmbi Emmanuel3 and
1,2 Institute of Agricultural Research for Development (IRAD), Njombe Multipurpose Research Station,
P.O.Box 13, Njombe, Cameroon.
3,4 Department of Plant Biology, University of Yaounde I, P.O.Box 812, Yaounde, Cameroon.
1*Corresponding Author’s Email: segnoujean @ yahoo.fr; Telephone: (237) 77 56 75 10
A study on the effects of chemical treatments of pests and
diseases on pepper (Capsicum annuum L.) was carried out at
the Institute of Agricultural Research for Development in
Cameroon. The trial was laid out in a 4 x 4 factorial design
(4 varieties of pepper x 4 chemical treatments), making 16
treatments in 4 replications. The results showed that
chemical treatments had highly significant effects (P <
0.001) on the reduction of pepper plant infections by viral
diseases. To control Fusarium disease, fungicide treatment
and insecticide + fungicide treatment gave satisfactory
results. To combat fruitflies (Ceratitis spp., Bactrocera
spp., etc.) responsible for premature fruit fall off,
chemical treatments had highly significant effects (P <
0.001) on the reduction of the pests’ population. The
chemical treatments used during this experiment had highly
significant effects (P < 0.001) on the number and average
weight of marketable fruits harvested during the
reproductive phase of pepper plants. Highly significant
differences were observed in fruit yields from subplots in
the following decreasing order: insecticide + fungicide,
insecticide, fungicide and finally the control with no
chemical treatment. Concomitantly, the total revenue and
benefit margin accruing from the different chemical
treatments followed the same trend.
Key words: Capsicum annuum L., chemical treatments, pests and diseases, yield.
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