Suhail Anver

Effect of different organic amendments with Paecilomyces lilacinus for the management of soil nematodes

Oil seed cakes of neem/margosa (Azadirachta indica), castor (Ricinum communis), mustard (Brassica compestris), rocket salad/duan (Eruca sativa) were found to be highly effective in reducing the multiplication of nematodes and consequently plant growth and bulk density of woody stem of pigeonpea increased significantly. The multiplication rate of nematodes was less in presence of Paecilomyces lilacinus as compared to the absence of P. lilacinus. Damage caused by the nematodes was further reduced when P. lilacinus was added along with oil-cakes. Most effective combination of P. lilacinus was with neem cake.

Control of root-knot nematode, Meloidogyne incognita and reniform nematode, Rotylenchulus reniformis on pigeonpea and linseed

Abstract Pigeonpea (Cajanus cajan) and linseed (Linum usitatissimum) are susceptible to Meloidogyne incognita and Rotylenchulus reniformis nematodes. Reduction in different growth parameters (length and weight of plant, number of pods), bulk density of pigeonpea stem, oil content of linseed, chlorophyll content of leaf and water absorption of roots caused by M. incognita and R. reniformis were statistically significant. Similar effects were also observed in plants raised from seeds soaked in different concentrations of water soluble fractions (WSF) of rice polish and pyridoxine solutions, however, the reductions were of a comparatively lesser extent. Higher concentrations of the solutions were more effective when compared to lower ones and pyridoxine was more beneficial than WSF for improving plant growth and reducing disease incidence.

Effect of root‐knot and reniform nematodes alone and in combination on the chickpea

An increase in the inoculum level of root‐knot nematode, Meloidogyne incognita and the reniform nematode, Rotylenchulus reniformis resulted in a relative decrease in plant growth parameters of chickpea. Consequently water absorption capability of roots was impaired. M. incognita caused greater reduction than R. reniformis at the same inoculum level. In concomitant inoculation of M. incognita and R. reniformis there was greater suppression in plant growth of chickpea. The suppression in concomitant inoculations was less than the sum of the suppression caused by the same levels of inoculations of the individual species. The multiplication rate of the nematodes decreased as the inoculum level increased. The results also suggest competition for feeding sites between the two nematode species. The multiplication rate of one species progressively decrease with the increase in the inoculum levels of the other nematode.

Effect of root-knot and reniform nematodes on plant growth and bulk-density of plant residues of pigeonpea

Abstract Different varieties of pigeonpea showed varied reactions to the root-knot nematode Meloidogyne incognita and reniform nematode Rotylenchulus reniformis. Loss in plant weight, number of pods per plant, chlorophyll content of leaves and bulk density of stem parts was directly correlated with the multiplication of the nematodes, the highest being in susceptible varieties with minimal or no change in resistant varieties. Variety ICPL 8562 showed resistance to M. incognita and variety ICPL 87 to R. reniformis.