Tylenchorhynchus brevilineatus Williams, 1960
Reported median body size for this species (Length mm; width micrometers; weight micrograms) - Click:
Andhra Pradesh State, India
. A severe nematode disease of groundnut, popularly called 'Kalahasti
malady', caused by the nematode Tylenchorhynchus brevilineatus, has been
prevalent since 1976 in parts of Andhra Pradesh State, India (Mehan, et al.
Ectoparasite on epidermal cells between root
hairs in zone of elongation.
Loss of yield.
Resistance: Fourteen of 1599 genotypes tested were identified to
have stable resistance. Most of the resistant genotypes have undesirable
pod/seed characteristics, but one is a high-yielding breeding line (TCG 1518)
which is being released for use in Andhra Pradesh State, India (Mehan, et al.
Host Plant Resistance, Non-hosts
Organic Amendments: poultry manure (50 q ha-1), farmyard manure
(100 q ha-1) and saw dust (25 q ha-1) reduced population levels of T.
brevilineatus and disease severity, and in increasing groundnut yield over
non-amended control plots. Greatest nematode control (33.5%) and highest
increase in pod yields (50.3%) were obtained in poultry manure amendment
followed by neem cake (10 q ha-1). The increase in yield was related to
the decrease in nematode population. Application of poultry manure was highly
economical with benefit:cost ratio of 8.7 followed by farmyard manure with 3.6 (Naidu
et al, 2000a).
Crop Rotation: Tagetes erecta was a poor host for T.
brevilineatus. As a rotation crop, it reduced nematode populations in
soil and pod disease severity and increased groundnut pod yield. Mustard
also significantly increased pod yield (Naidu et al, 2000b).
Mehan, V. K., D.D.R. Reddy, and D. McDonald.. 1993. Resistance
in groundnut genotypes to Kalahasti malady caused by the stunt nematode,
Tylenchorhynchus brevilineatus. International Journal of Pest
Management 39: 201-203.
Naidu, P. H., G. J. Mosas and K.Sitaramaiah. 2000a. Control
of groundnut Kalahasti malady (Tylenchorhynchus brevilineatus) through
organic and inorganic soil amendments. Journal of Mycology and Plant
Naidu, P. H., G. J. Mosas and D.D.R. Reddy. 2000b. Influence
of intercropping on Kalahasti malady (Tylenchorhynchus brevilineatus) in
groundnut. Journal of Mycology and Plant Pathology 30:207-209.