Seasonal incidence, population dynamics and morphometric traits of exotic coconut whiteflies in southern Tamil Nadu

IF 0.2 Q4 HORTICULTURE Journal of Horticultural Sciences Pub Date : 2023-06-30 DOI:10.24154/jhs.v18i1.2167
S. Suriya, G. Preetha, N. Balakrishnan, J. Sheela
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Abstract

Survey was conducted at fortnightly intervals to assess the intensity of damage caused by the invasive whiteflies in coconut in the southern districts of Tamil Nadu viz., Thoothukudi, Tirunelveli, Tenkasi and Kanyakumari from December 2020 to August 2021. Among the four districts, Kanyakumari recorded the highest whitefly incidence (56.30%), whereas, Tenkasi showed the lowest infestation (48.83%). Two whitefly species viz., rugose spiralling whitefly, Aleurodicus rugioperculatus Martin and bondars nesting whitefly (BNW), Paraleyrodes bondari Peracchi were observed in all the surveyed districts. The rugose spiralling whitefly nymphs and adult populations were found to be highest in Kanyakumari (49.46 nymphs/leaflet; 36.99 adults/leaflet) and lowest in Tenkasi (32.76 nymphs/leaflet; 26.71 adults/leaflet). Similarly, the population of bondars nesting whitefly nymphs and adults were highest in Kanyakumari (35.31 nymphs/leaflet; 34.84 adults/leaflet), whereas, the lowest nymphal population was observed in Tenkasi (22.79 nymphs/leaflet) and adult population in Thoothukudi (24.19 adults/leaflet). In morphometric analysis, length and breadth of egg (0.24 ± 0.03 mm and 0.13± 0.02 mm), nymphal (0.83 ± 0.08 mm and 0.38 ± 0.04 mm), pupal (1.08 ± 0.09 mm and 0.70 ± 0.09 mm), adult (female: 2.59 ± 0.09mm, 1.71 ± 0.14 mm; male: 2.27 ± 0.21 mm, 1.30 ± 0.05 mm) was recorded for A. rugioperculatus and egg (0.15 ± 0.02 mm and 0.08 ± 0.01 mm), nymphal (0.46 ± 0.02 mm and 0.36 ± 0.02 mm), pupal (0.59 ± 0.16 mm and 0.41 ± 0.09 mm), adult (1.09 ± 0.08 mm and 0.73 ± 0.07 mm) for P. bondari.
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泰米尔纳德邦南部外来椰子粉虱的季节发病率、种群动态和形态特征
在2020年12月至2021年8月期间,每隔两周进行一次调查,以评估入侵白蝇对泰米尔纳德邦南部地区、Thoothukudi、Tirunelveli、Tenkasi和Kanyakumari的椰子造成的损害程度。4个区中,肯亚库马里区白蝇发病率最高(56.30%),滕卡西区最低(48.83%)。在所有调查区均观察到2种白蝇,分别是皱纹白蝇、白斑白蛉和结巢白蝇、bondari Peracchi。白蝇若虫和成虫种群以肯亚库马瑞最多(49.46若虫/张);36.99个成虫/小叶),最低的是Tenkasi(32.76个若虫/小叶;26.71成人/传单)。同样,结巢白蝇若虫和成虫的数量也以肯亚库马瑞最高(35.31若虫/张);34.84成虫/小叶),而天卡西(22.79成虫/小叶)和土土库地(24.19成虫/小叶)的若虫数量最少。在形态计量学分析中,卵长、宽分别为0.24±0.03 mm和0.13±0.02 mm,蛹长、宽分别为0.83±0.08 mm和0.38±0.04 mm,蛹长、宽分别为1.08±0.09mm和0.70±0.09mm,成虫长、宽分别为2.59±0.09mm和1.71±0.14 mm;雄、卵分别为(0.15±0.02 mm和0.08±0.01 mm)、若虫分别为(0.46±0.02 mm和0.36±0.02 mm)、蛹分别为(0.59±0.16 mm和0.41±0.09 mm)、成虫分别为(1.09±0.08 mm和0.73±0.07 mm)。
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来源期刊
Journal of Horticultural Sciences
Journal of Horticultural Sciences Agricultural and Biological Sciences-Plant Science
CiteScore
0.30
自引率
0.00%
发文量
0
审稿时长
6 weeks
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