Segnou Et Al


Segnou et al

Journal of  Agricultural Sciences

Vol. 3 (
1), pp.012-020,
January 2013

 ISSN: 2276-7770 






Effect of Chemical Treatments on Pests and Diseases of
Pepper (Capsicum annuum L.)


Segnou Jean1*, Amougou Akoa2,
Youmbi Emmanuel3  and 

Jean Njoya4



Institute of Agricultural Research for Development (IRAD),
Njombe Multipurpose Research Station, 

P.O.Box 13, Njombe,


Department of Plant Biology,University of
Yaounde I, P.O.Box 812, Yaounde, Cameroon.


Author’s Email:

segnoujean @

(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.


Aliyu L (2000). Effect of organic and mineral fertilizer on growth,
yield and composition of pepper (Capsicum
L.). Biological Agriculture
and Horticulture
18 (1): 29-36.

Antonius GF (2004). Residues and half-lives of Pyrethrins of field grown
pepper and tomato. Journal of
Environmental Science and Health
. Part B: Pesticides, food contaminants, and agricultural wastes 39 (4): 491-503.

Boucher T, Ashley J, Durgy R, Sciabarrasi M & Calderwood W (2003).
Managing the pepper maggot (Diptera:
) using perimeter trap cropping. Journal of Economic Entomology
9(2): 420-432.

Chellemi DO (2006). Effect of urban debris and soil management practices
on plant parasitic nematods, Phytophtora
blight and Pythium root rot of bell
pepper. Crop Protection 25(10): 1109-1116.

Chellemi DO & Rosskopt EN (2004). Yield potential, soil quality
under alternative crop production practices for market pepper. Renewable Agriculture and Food Systems
19(3): 168-175.

Cruz D, Acosta J & Negron F (1984). Evaluation of various pesticides
for the control of aphids, mites, and nematodes in peppers. The Journal of Agriculture of the University
Puerto Rico 68: 457-465.

Daniell G & Falk A (1994). Economic comparison of Phytophtora root rot control methods. Crop Protection 13: 331-336.

DeWitt D & Bosland P (1996). Peppers of the world. TenSpeed Press,
Berkley, USA.

Flors V, Miralles C, Cerezo M, Gonzalez-Bosch C & Garcia P (2001). Effect of a novel chemical mixture on senescence processes and
plant-fungus interaction in Solanaceae
plants. Journal of Agriculture and Food
49 (5): 2569-2575.

Grubben GJH & El Tahir IM (2004). Capsicum annuum L. In PROTA2/ Vegetables/Légumes. (Eds Grubben GJH and Denton OA).
PROTA, Wageningen, The Netherlands. 19 p.

James B, Atcha-Ahowé C, Godonou I, Baimey H, Goergen H, Sikirou R &
Toko M (2010). Integrated pest management in vegetable production: A guide for
extension workers in West Africa. International Institute of tropical Africa
(IITA), Ibadan, Nigeria. 120 p.

Kim KD, Nemec S and Mousson G (1997). Effects of composts and soil
amendments on soil microflora and Phytophtora
root and crown rot of bell pepper.
Crop Protection 16: 165-172.

Kome JJ (1979). Protection des plantes et des denrées. Laboratoire
d’entomologie, Centre Universitaire de Dschang, Cameroun.
111 p.

Maruthi MN, Muniyappa D, Green SK, Colvin J and Hanson P (2003).
Resistance of tomato and sweet pepper genotypes to tomato leaf curl Bangalore
virus and its vector Bemisia tabaci. International Journal of Pest Management 49(4): 297-303.

Ogbalu OK (1999). The effects of different traditional sources of
nutrients on the infestation of pepper fruits by the pepper fruitfly (Atherigona orientalis Shiner), in
Journal of Agronomy and
Crop Science
182 (1): 65-71.

PDEA (2000). Programme prioritaire de promotion des PME au Cameroun. Projet N° CMR/92/007. 129 p.

Seal DR, Ciomperlik M, Richards MI and Klassen W (2009). Comparative
effectiveness of chemical insecticides against the chili pepper thrips, Scirtothrips dorsalis Hood (Thysanoptera: Thripidae), on pepper and
their compatibility with natural enemies. Crop
25(9): 949-955.

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