HOST-PARASITE RELATIONSHIPS OF PSIDIUM GUAJAVA CULTIVARS AND MELOIDOGYNE INCOGNITA

J. O. Babatola, E. E. A. Oyedunmade

Abstract


Shade-house and laboratory experiments were conducted to establish the host-parasite relationship between four guava cultivars and Meloidogyne incognita. Roots of the guava cvs. were infested by the nematode immediately after germination and galls were observed 4 days after germination in cv Webber Supreme and 8 days after germination in cv. Branca. All juvenile stages of the nematode developed within the roots of all the guava varieties. Eggs were observed on the roots of cv. Webber Supreme 25 days after germination and 31 days after germination in cv. Branca. Growth decreased significantly with increasing inoculum level of the nematode in all the varieties after 16 weeks from inoculation. Dry matter accumulation and plant height were most severely affected in cv. Allahabad.

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