BIO-MANAGEMENT OF ROOT-KNOT NEMATODE, Meloidogyne incognita (Kofoid and White) Chitwood IN JASMINE (Jasminum sambac L.)

N SEENIVASAN, K POORNIMA

Abstract


Investigations were undertaken in pots (30×20×18 cm) filled with 5 kg of sterilized potting mixture consisting of red soil:sand:FYM (2:1:1 v/v) to assess the effect
of organic amendments viz., neem cake, vermicompost, pungam cake and castor cake;
bio-agents viz., PGPR Pseudomonas  fluorescens,  the antagonistic  fungus Trichoderma viride,  the egg parasitic fungi Paecilomyces  lilacinus and nematicides viz., carbofuran
and phorate, against root-knot nematode, Meloidogyne incognita in jasmine (Jasminum sambac L). The results indicated that P. fluorescens @ 10g/ plant (6x108
 colony forming units/g),  gave maximum reduction of juveniles per 100g soil (69.7 %), number of adult females (70.1%) and eggs per g root (87.2%), gall index (2.6) and increased flower yield (36.6%). Carbofuran, phorate, Paecilomyces lilacinus and neem cake were next in line in efficacy. Further, organic amendments and bio-agents had a positive influence on growth
parameters viz., plant height, shoot weight and root weight. The endophytic colonization potential of  the bio-agents  introduced  into  the soil was confirmed by  re-isolating  them
from jasmine roots.

Keywords


Bio-control; jasmine; Meloidogyne incognita; organic amendments

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