Evaluation of Sesame Genotypes for their Resistance against Leaf Webber, Antigastra catalaunalis Duponchel

Author: J. Sharma, V. C. Gadhiya, A. Sharma, K.D. Shah and D.V. Patel

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Abstract

Leaf webber, Antigastra cataluanalis Duponchel is a serious pest of sesame causes 72 per cent yield loss. The bio-chemical constituents of genotypes/varieties can suppress the insect pest damage and increases the tolerance level of host plant. Decreasing the usage of chemical insecticides also an important advantage of resistant varieties. Therefore, these biochemical parameters can be utilized as a marker for identification of source of resistance against targeted pest. Thus, experiment was carried out to evaluate total ten genotypes/varieties for their resistance against leaf webber, A. catalaunalis based on morphological, biochemical and damage percentages at Instructional farm, Department of Agronomy, College of Agriculture, Junagadh Agricultural University, Junagadh during Kharif, 2021. Morphological characters and biochemical characters of sesame viz., number of leaves per plant (r = -0.928**) and total phenol (r = -0.857**) showed a negative highly significant correlation with per cent leaf damage. While, total sugar (r = 0.776**) and total protein (r = 0.683**) showed positive highly significant association with leaf damage. However, trichomes/cm2 (r = -0.259) showed non-significant negative correlation with per cent leaf damage. The number of capsules per plant (r = -0.876**) showed a highly significant negative correlation with the mean per cent of flower and capsule damage. Consideration of leaf, flower and capsule damage, none of the genotypes/varieties were found highly resistant (HS) and highly susceptible (HS). However, variety G. Til-10 and genotype AT-457 were found resistant (R) while varieties G. Til-4 and G. Til-6 were found susceptible (S) against leaf webber damage. Among all genotypes/varieties, the highest yield (520.13 kg/ha) was recorded from G. Til-10 followed by AT-457 (514.15 kg/ha).

Keywords

Sesame, leaf webber, Antigastra catalaunali, genotypes, screening

Conclusion

The varietal screening of sesame against leaf webber during kharif season revealed that the genotype AT-457 and variety G. Til-10 has very less amount of leaf, flower and capsule damage and highest yield with highest content of phenol. These genotype/variety also has lowest sugar and protein content which gives resistance character to them against A. catalaunalis. Moreover to this, these can be used as resistant source at farmer level.

References

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How to cite this article

J. Sharma, V. C. Gadhiya, A. Sharma, K.D. Shah and D.V. Patel (2023). Evaluation of Sesame Genotypes for their Resistance against Leaf Webber, Antigastra catalaunalis Duponchel. Biological Forum – An International Journal, 15(7): 75-82.