Escape resistance in fieldpea against Phytomyza horticola Goureau, as influenced by sowing time and its correlation with plant metabolites Yadav Rajeev Kumar1, Chandra Anup2,*, Parihar Ashok Kumar2, Sujayanand G.K.2, Kumar Vaibhav2, Bandi Sanjay M.2, Arya Meenakshi1, Usha1 1Rani Lakshmi Bai Central Agricultural University, Jhansi, 284003, Uttar Pradesh 2ICAR-Indian Institute of Pulses Research, Kalyanpur, Kanpur, 208024, Uttar Pradesh *Email: anup.ento@gmail.com
Online published on 26 June, 2023. Abstract Fieldpea or dry pea (Pisum sativum L.) is one of the important, highly productive cool season food legume crops and pea leaf miner, Phytomyza horticola Goureauis is a pest of high economic importance, associated with the crop. Twenty eight diverse field pea genotypes including checks were screened for their susceptibility to the pest and to study the influence of sowing time on the extent of infestation of pea leaf miner. The correlation of infestation with the host primary and secondary metabolites was also examined. In late sown condition, only eight genotypes were categorized as ‘Susceptible’, 2 genotypes under ‘Moderately Resistant’, 3 genotypes under ‘Intermediate’, whereas 15 genotypes were categorized as ‘Moderately Susceptible’. None of the genotypes could be categorized as ‘Very Highly Resistant’, ‘Highly Resistant’, ‘Resistant’, ‘Highly Susceptible’ and ‘Very Highly Susceptible’ in case of late planting. In case of timely planting, only 9 genotypes were categorized under ‘Moderately Susceptible’, 7 genotypes each under ‘Moderately Resistant’ and ‘Intermediate’ and 5 genotypes grouped under ‘Highly Resistant’ category. None of the genotypes categorized as ‘Susceptible’ or beyond that in case of timely planting. Most of the genotypes which showed susceptibility under late sown condition had expressed more level of resistance in the timely sown crop. Although, different fieldpea genotypes differed significantly in terms of quantity of primary and secondary metabolites estimated, only the total phenol content was found significantly and positively correlated with the per cent infestation in the late sown genotypes. Top Keywords Genotypes, Leaf miner, Pisum sativum L. resistance, Screening, Susceptibility. Top |