Author(s):

Ashutosh Shukla and Ramesh Chand

Abstract: Experiment was conduct to study the effect of some Insecticides on plant growth and nematode multiplication. The observations (i.e. plant height, root length, weight of plant, number of galls, root population, egg population, soil population, total nematode population, and multiplication factor) revealed that all the plant growth and nematode multiplication parameter decreases in comparison to the uninoculated check and increases in comparison to the inoculated check. All the treatments were found significantly different from each other. The plant height, root length, weight of plant, number of galls, root population, egg population, soil population, total nematode population, and multiplication factor of nematode was significantly lower in all the treatment in comparison to treated check. The highest plant height, root length, Plant weight, and lowest number of galls, root population, egg population, soil population, total nematode population, and multiplication factor was recorded (20.50), (7.75), (1.98), (4.50), (13.00), (632.25), (892.25), (1537.50), (0.51) respectively in untreated check. The percent increase and decrease in all the parameters recorded was 14.81, 20.31, 23.44, 28.13, 10.94, 14.0618.1323.44,10.63, 13.4415.63 and 19.81percent plant height, 32.43, 41.31, 47.67, 64.20, 28.18,37.71, 46.61, 57.84, 15.89, 28.60, 40.25 and 50.42 percent in root length, 07.27, 12.73, 17.57, 20.00, 06.06, 11.51, 16.97, 19.93, 05.45, 10.91, 15.15, 18.18 and 07.27 percent in root weight, 62.64, 70.33, 79.12, 87.91, 59.34, 65.93, 74.73, 86.26, 57.14, 62.09, 73.08, 82.97 and 45.50 percent in number of gall 55.3, 64.15,77.07,87.32,50.00, 61.22, 71.71,84.88,46.59, 56.10,67.01, 81.95, 102.50 in root population, 71.86, 78.79, 89.22, 94.61,66.35,75.09,83.63,92.17,63.59,71.54,81.27,90.29, percent in eggs population, 52.99,64.33,72.03,77.10,49.56,62.03,69.95,76.48,64.44,57.47,66.16,73.76, percent in soil population, 67.08,75.11,84.89,90.23,67.46,74.76,80.17,88.24,59.24,67.96,77.44,86.15 percent in total nematode population,67.05,75.05,84.95,90.29,62.29,71.81,80.19,83.38,59.24,68.00,77.52,86.10 percent in multiplication factor respectively. Rice (Oryza sativa L.) Wheat (Triticum aestiva L.) cropping system is the mainly popular cropping system for food grain production in India and as well as all over the world. This system covers large aria in India, mainly major rice-wheat growing states are Punjab, Haryana, Uttar Pradesh, Himachal Pradesh, Bihar, and West Bengal. All the rice wheat growing state produce 106.54 million tones rice and 93.90 mt. wheat from 43.95 and 29.90 mha aria. (Anonymous, 2013). (Anonymous, 2013-14). Rice and wheat in growth phase suffer many diseases caused by fungi, bacteria, virus and plant parasitic nematode. Considering the fact that plant parasitic nematode particularly rice root- knot nematode Meloidogyne graminicola is serious nematode pest of rice-wheat cropping system of eastern Uttar Pradesh where it is predominantly used by the farmers, investigation was planned to generate information on its distribution and host range with host reaction on some rice and wheat varieties. Broad host range of nematode beneficial maintain population absence of main host, many scientist reported rice root knot nematode M. graminicola maintain the population on various weed host and maintain population on weeds for next season (Rich, et al., 2009). Moreover rice root nematode com

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