SCREENING OF AFRICAN AND FRENCH MARIGOLD GERMPLASMS AGAINST Tetranychus urticae KOCH (ACARI: TETRANYCHIDAE) UNDER FIELD CONDITIONS

BAMEL, KARUNA and GULATI, RACHNA and KHUSHBU, . and JANGRA, MONIKA and BAMEL, KESHAV (2022) SCREENING OF AFRICAN AND FRENCH MARIGOLD GERMPLASMS AGAINST Tetranychus urticae KOCH (ACARI: TETRANYCHIDAE) UNDER FIELD CONDITIONS. UTTAR PRADESH JOURNAL OF ZOOLOGY, 43 (24). pp. 277-287. ISSN 0256-971X

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Abstract

The germplasms of African and French marigold were screened at Research Farm Area, Department of Horticulture, CCS Haryana Agricultural University, Hisar, Haryana against the two spotted spider mite, Tetranychus urticae (TSSM) in the winter season from first week of October to first week of March, 2018. The germplasm tall orange African sheltering lowest mite population (9.82 mites/leaf) was marked as the least susceptible and Hisar Jafari-2 French with 32.21 mites/leaf was categorized as highly susceptible for T. urticae infestation. Mite population was recorded weekly and significantly higher number of mites was recorded on grown up leaves followed by tender and older leaves of marigold plants. Irrespective of the germplasm, the mite number was found to significantly increase with each observation period till the attainment of peak in population in the month of January (35.51 mites/ leaf) while their least population was recorded in the month of October (6.65 mites/leaf). In general, French germplasms were comparatively more susceptible to T. urticae infestation as compared to African germplasms.

Item Type: Article
Subjects: Open Research Librarians > Biological Science
Depositing User: Unnamed user with email support@open.researchlibrarians.com
Date Deposited: 06 Nov 2023 05:01
Last Modified: 06 Nov 2023 05:01
URI: http://stm.e4journal.com/id/eprint/1910

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