root knot


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root knot

[′rüt ‚nät]
(plant pathology)
Any of various plant diseases caused by root-knot nematodes which produce gall-like enlargements on the roots.
References in periodicals archive ?
Fery says he expects to release next year a new line of bell peppers that are resistant to root knot nematodes.
The southern root knot nematode damages plant roots, cutting yields by up to 50 percent and killing a plant under extreme conditions, says Philip D.
Rahman ML, Miah SA (1993) Effect of organic and inorganic soil amendment on root knot nematode (Meloidogyne graminicola) in deepwater rice.
It also protects soybeans from nematodes, such as reniform, root knot and soybean cyst (SCN).
Sixty days after inoculation the plants were uprooted and root gall indices were determined by the Taylor and Sasser, 1978 root knot index on a scale 0-4, where 0=no infection or root galling, l=slight infection (1%-25%), 2=moderate infection (26%-50%), 3=severe infection (51%-75%) and 4=very severe infection (76%-100%) [13].
Keith Ottesen, clerk of the course at Chepstow, said yesterday: "We are repairing several small, isolated areas by hand, raking out the areas of turf affected by the root knot nematodes.
In Georgia, at least one species of the root knot nematode is found in 25% of peanut fields (Motsinger et al.
An investigation by independent consultants has now confirmed the turf has been affected by Root Knot Nematodes.
And the experts confirmed the pitch has been affected by a condition called Root Knot Nematodes which causes gradual deterioration of the grass quality.
Root knot nematodes have been found in the turf which has affected the quality of some parts of the pitch, and it has now been decided to relay the grass ahead of Wales' autumn Test series opener against world champions South Africa on November 8.
Siddiqui et al (17) observed the production of HCN by Pseudomonas fluorescens strain CHAO as an antagonistic factor that contributes to biocontrol of Meloidogyne javanica a root knot nematode, in situ and suppression of galling in tomato.
The past decade has seen emergence of aggressive root knot nematodes (Meloidogyne spp.