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Fig. 2: Histogram showing the alcohol dehydrogenases and glucose Dehydrogenases

activities in the host plant S. melongena infected by the root-knot nematode M.incognita

0.02

0.018

0.016

0.014

0.012

0.01

0.008

0.006

0.004

0.002

0
CUI IUT

Chlorophyll-a(Mg/ml) Chlorophyll-b (Mg/ml) Total Chlorophyll (Mg/ml)

Fig.3: Histogram showing the total chlorophyll of shoot in the host plant
S.melongena infected by the root-knot nematode M.incognita

Total chlorophyll content

DISCUSSION
The root-knot nematode, M. incognita is proved to be a serious agricultural problem.

As an obligate endoparasite, it causes anchorage and absorption problems in susceptible
plants. The plants susceptible to nematode infection become nutrientially deficient and

exhibit symptoms of stunted growth, chlorosis, wilting, etc. Stunted plant growth by

nematode infection was also reported by earlier workers.

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