Response of five pulse crops to different inoculums of root-knot nematode (Meloidogyne incognita).

摘要

The response of 5 pulse crops, namely green gram (Vigna radiata), black gram (Vigna mungo), horse gram (Dolichos biflorus [Macrotyloma uniflorum]), soyabean and French bean (Phaseolus vulgaris), to root-knot nematode (M. incognita) infestation at 3 inoculum levels (100, 500 and 1000 second stage juveniles) was evaluated under glasshouse conditions. Although, in all the crops a growth-promoting effect was observed at inoculum level of 500 (in comparison to the lowest and the highest inoculum levels), the variations in growth parameters (root weight, shoot weight and shoot length) were not always statistically significant. On the basis of root gall index and nematode multiplication potential, soyabean and horse gram were graded as highly resistant and resistant, respectively, while black gram, green gram and French bean were found nematode-susceptible crops, in descending order.