Greenhouse experiment on the impact of certain organic amenders i.e. shrimp
shell and castor dried leave powders applied singly or in combination with oxamyl (at
half of recommended dose) in comparison with oxamyl on the infection of
Me/oidogyne incognita to tomato plant cv. strain- 83 revealed that' all treatments
tested obviously improved plant growth criteria and significantly suppressed
nematode population in roots, number of galls and egg masses. Moreover, the
application of shrimp shell powder to tomato plant infected with M. incognita showed
the greatest performance of plant growth parameters when oxamyl was added at the
half recommended dose, following with plant receiving castor powder with the same
dose of oxarnyl over single application tested with values of 50.85% and 44.02% (or
plant fresh weight; and 137.3% and 85.1 % for shoot dry weight. respectively as
compared to nematode alone. The concomitant treatments using shrimp shell or
castor powders plus oxamyl showed belter reduction in nematode population
densities, number of galls and egg masses than single application except in the case
of eggmasses with castor + oxamyl treatment (63.9%) in relation to oxamyl (65.2%),
respectively, as compared to nemstode alone.