Opara Et Al

Opara et al



Greener
Journal of  Agricultural Sciences


Vol. 3 (5), pp.
312-319, May 2013.


 ISSN: 2276-7770 



Research

Paper



Manuscript Number: 022013484

 



Potency of Some Plant Extracts and Pesticides on
Bacterial Leaf Blight Diseases of Cocoyam (Colocasia
Esculenta)
in Umudike, South Eastern Nigeria

 



Emma Opara*1, Theresa C. Njoku2
and Chikodi Isaiah3

 


1*,3
Department
of Plant Health Management, Michael Okpara University of
Agriculture, Umudike.


2
Department
of Crop Science, Imo State University, Owerri.

 


1*
Corresponding
Author’s Email:

euopara22 @ yahoo. com

Abstract:

A pot trial was
conducted in 2010 and 2011 cropping seasons at the screen
house of Michael Okpara University of Agriculture, Umudike
to determine the potency of some plant extracts and
pesticides for the control of bacterial leaf blight of
cocoyam (Colocasia esculenta L.) Scholt. The
materials employed include: lemon grass (Cymbopogon
citrates).
Black pepper seed (Piper guineense),
orange peel (Citrus sinesis), streptomycin sulphate
(antibiotic), copper oxychloride (fungicide) and sterile
water (control). The experiment was laid in complete
randomized design (CRD) and replicated six times. The plant
materials used were first made into aqueous extracts using
cold water extraction and diluted to 10% concentration.
Application on leaves was by use of a hand sprayer for two
weekly intervals. Data were collected on disease severity
and incidence including growth parameters and on yield of
corms.  The results obtained showed that all the plant
extracts were able to reduce disease and increase yield
better than the untreated control.

 

Keywords:
Colocasia esculenta
, bacterial leaf blight, plant
extracts, Xanthomonas campestris pv. Campestris.


Leave a Reply

Your email address will not be published. Required fields are marked *