Abstract:
The effects of poultry manure and cow dung in compa
rison with the nematicide,
carbofuran on the yield of okra infested with root-
knot nematode
Meloidogyne incognita
Race 2 were investigated. Two plots of 17×11 m, eac
h naturally infested with the
mentioned nematode, were selected for the study. Tr
eatments were poultry manure and
cow dung each at the rates of 5 and 10 t ha
-1
, carbofuran 3G at the rates of 1.5 and 3.0 kg
ai ha
-1
, and a control. One week after application, okra s
eeds were sown at two seeds per
hole and thinned to one plant, one week after plant
ing. Number of pods, cumulative
weight of okra pods, root gall-index, soil chemical
properties, and soil nematode densities
in soil were determined at the beginning and end of
the study. The results showed that the
highest rates of poultry manure, cow dung, and carb
ofuran significantly (P
≤
0.05)
reduced root gall-index and nematode population den
sity in soil and correspondingly
increased fruit yield in comparison to those at low
er rates and the control. The results of
this study suggest that incorporation of poultry ma
nure or cow dung in nematode-infested
field has the potentials to suppress nematode popul
ation and reduce nematode damage on
okra.
Keywords
: Nematode population, Root gall-index, Root-knot
nematode.
