Scholarlink

<p>The rugose spiraling whitefly, <i>Aleurodicus rugioperculatus</i>, exhibits a complex life cycle and high reproductive potential, making it a serious threat to coconut ecosystems. Eggs are elliptical, translucent, and deposited in characteristic spiral patterns on the leaf under surface, measuring 0.3426 ± 0.0028&#xa0;mm in length and 0.1720 ± 0.0034&#xa0;mm in width, with an incubation period of 6.90 ± 0.88 days. The insect develops through four nymphal instars, beginning with a mobile crawler stage and ending in a pseudo-puparium measuring 1.5940 ± 0.0385&#xa0;mm. Adults exhibit clear sexual dimorphism, with females larger in size (3.1460 ± 0.0329&#xa0;mm) and more abundant than males (sex ratio 1:0.46). Females exhibit longevity of 26.00 ± 2.34 days and a mean fecundity of 41.28 eggs. Molecular characterization using mtCOI gene sequencing confirmed the identity of <i>A. rugioperculatus</i>, showing 97–99% similarity with previously reported isolates. Phylogenetic analysis further validated its genetic placement within the whitefly group and revealed distinct clustering among isolates from Tamil Nadu. Life table parameters highlight the species’ strong capacity for population build-up, with a net reproductive rate (R₀) of 24.08 offspring per female, an intrinsic rate of increase (r) of 0.0646 females per day, and a doubling time of 10.72 days. A mean generation time of 49.25 days and a short adult pre-oviposition period (APOP) of 5.14 days further indicate the potential for rapid population expansion under favourable conditions. These findings reaffirm the invasive potential of <i>A. rugioperculatus</i> and underscore the necessity for strengthened monitoring and integrated management interventions to mitigate its impact on coconut-based ecosystems.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Morphological, molecular characterization, life cycle and age specific life table parameters of coconut rugose spiralling whitefly, Aleurodicus rugioperculatus martin: an invasive pest of India

  • 期刊论文

  • 发表日期：

    2026年2月4日

查看全文
  • Kolanthasamy Elango,
  • Jeyarajan Nelson,
  • Thangavel Tamilnayagan,
  • Dinesh Kumar Palaniappan

摘要

The rugose spiraling whitefly, Aleurodicus rugioperculatus, exhibits a complex life cycle and high reproductive potential, making it a serious threat to coconut ecosystems. Eggs are elliptical, translucent, and deposited in characteristic spiral patterns on the leaf under surface, measuring 0.3426 ± 0.0028 mm in length and 0.1720 ± 0.0034 mm in width, with an incubation period of 6.90 ± 0.88 days. The insect develops through four nymphal instars, beginning with a mobile crawler stage and ending in a pseudo-puparium measuring 1.5940 ± 0.0385 mm. Adults exhibit clear sexual dimorphism, with females larger in size (3.1460 ± 0.0329 mm) and more abundant than males (sex ratio 1:0.46). Females exhibit longevity of 26.00 ± 2.34 days and a mean fecundity of 41.28 eggs. Molecular characterization using mtCOI gene sequencing confirmed the identity of A. rugioperculatus, showing 97–99% similarity with previously reported isolates. Phylogenetic analysis further validated its genetic placement within the whitefly group and revealed distinct clustering among isolates from Tamil Nadu. Life table parameters highlight the species’ strong capacity for population build-up, with a net reproductive rate (R₀) of 24.08 offspring per female, an intrinsic rate of increase (r) of 0.0646 females per day, and a doubling time of 10.72 days. A mean generation time of 49.25 days and a short adult pre-oviposition period (APOP) of 5.14 days further indicate the potential for rapid population expansion under favourable conditions. These findings reaffirm the invasive potential of A. rugioperculatus and underscore the necessity for strengthened monitoring and integrated management interventions to mitigate its impact on coconut-based ecosystems.