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Off-season survival and life history of beet armyworm, Spodoptera exigua (Hubner) on various host plants.

التفاصيل البيبلوغرافية
العنوان: Off-season survival and life history of beet armyworm, Spodoptera exigua (Hubner) on various host plants.
المؤلفون: Rajesh Chowdary L; Agricultural Research Station, Acharya N. G. Ranga Agricultural University, Darsi, Prakasam, 523247, India., Suneel Kumar GV; Administrative Office, Acharya N. G. Ranga Agricultural University, Lam, Guntur, 522034, Andhra Pradesh, India., Bharathi S; Agricultural Research Station, Acharya N. G. Ranga Agricultural University, Darsi, Prakasam, 523247, India., Sarada O; Regional Agricultural Research Station, Acharya N. G. Ranga Agricultural University, Lam, Guntur, 522034, Andhra Pradesh, India., Nagaraju Y; Central Sericultural Research and Training Institute, Central Silk Board, Berhampore, West Bengal, India. nagarajulvrth62@gmail.com., Manikyanahalli Chandrashekara K; Division of Crop Protection, ICAR-Indian Institute of Horticultural Research, Bengaluru, 560 089, India. keerthimanikya@gmail.com., Naga Harish G; Agricultural Research Station, Acharya N. G. Ranga Agricultural University, Darsi, Prakasam, 523247, India.
المصدر: Scientific reports [Sci Rep] 2024 Jun 14; Vol. 14 (1), pp. 13721. Date of Electronic Publication: 2024 Jun 14.
نوع المنشور: Journal Article
اللغة: English
بيانات الدورية: Publisher: Nature Publishing Group Country of Publication: England NLM ID: 101563288 Publication Model: Electronic Cited Medium: Internet ISSN: 2045-2322 (Electronic) Linking ISSN: 20452322 NLM ISO Abbreviation: Sci Rep Subsets: MEDLINE
أسماء مطبوعة: Original Publication: London : Nature Publishing Group, copyright 2011-
مواضيع طبية MeSH: Spodoptera*/growth & development , Spodoptera*/physiology , Seasons* , Larva*/growth & development , Cicer*/parasitology, Animals ; Crops, Agricultural/parasitology ; India ; Zea mays/parasitology ; Vigna/parasitology ; Vigna/growth & development
مستخلص: The beet armyworm, Spodoptera exigua (Hubner) (Lepidoptera: Noctuidae), has become a significant pest of chickpea in recent years. The polyphagous nature allows it to survive on various hosts during the off-season, creating a great menace to the crop in the following season. To assess the incidence and document the alternate hosts of S. exigua, a rapid roving survey was conducted in 11 chickpea-growing areas of Prakasam district, Andhra Pradesh, India. Additionally, the life history traits of S. exigua were studied on major alternate host plants under laboratory conditions (27 ± 1 °C and 70 ± 2% RH) to understand the survival, life expectancy and potential contribution to future populations. The results show that, among the different crops surveyed, the maximum larval incidence was noticed in maize (1.93 larvae/plant), cowpea (1.73 larvae/plant), and sunflower (1.68 larvae/plant) during the off-season. Life history studies of S. exigua showed that highest larval survival percentage was observed on chickpea (83.6%), while the lowest was on maize (44.5%). The mean developmental time for larvae was longest on maize (27.1 days) and shortest on chickpea (14.9 days). Larvae did not develop beyond the third instar when fed with chilli. The growth index statistics showed chickpea (9.2) was the most suitable host plant, whereas maize (0.9) was the least suitable host. The age-stage-specific survival rate (S xj ) varied across developmental stages, and the survival curves overlapped, indicating different growth rates among individuals. The life expectancy (e xj ) at age zero was highest on groundnut (37.06 days). The intrinsic rate of increase (r) of S. exigua was lowest on maize (0.10 ± 0.0013) and highest on chickpea (0.22 ± 0.0010). Similarly, the net reproductive rate (R 0 ) was highest on chickpea (846.39 ± 18.22) and lowest on maize (59.50 ± 2.06). The population doubled every 3.08 ± 0.011 days on chickpea compared to 7.22 ± 0.80 days on maize. The study conclusively indicates that chickpea and sunflower, primarily cultivated during the rabi season in India, are the most preferred hosts for S. exigua. In contrast, maize and cotton, mainly grown during the kharif season, are less preferred and merely support the pest's survival. Consequently, S. exigua switches hosts between different crops growing seasons, so effective management of S. exigua during the kharif season can help prevent pest outbreaks during the rabi season.
(© 2024. The Author(s).)
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فهرسة مساهمة: Keywords: Spodoptera exigua; Demographic parameters; Development period; Growth index; Host plants; Life cycle; Off-season survival
تواريخ الأحداث: Date Created: 20240614 Date Completed: 20240615 Latest Revision: 20240618
رمز التحديث: 20240618
مُعرف محوري في PubMed: PMC11178929
DOI: 10.1038/s41598-024-64639-8
PMID: 38877078
قاعدة البيانات: MEDLINE
الوصف
تدمد:2045-2322
DOI:10.1038/s41598-024-64639-8