The Gall Wasp Ophelimus migdanorum and Its Parasitoid Closterocerus chamaeleon on Eucalyptus globulus at Two Sites with Different Rainfall Parameters in Bogotá, Colombia.

IF 1.4 3区 农林科学 Q2 ENTOMOLOGY
Neotropical Entomology Pub Date : 2024-12-01 Epub Date: 2024-09-24 DOI:10.1007/s13744-024-01195-w
Angélica Lores-Medina, Olga Pinzón-Florián
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引用次数: 0

Abstract

As a pest, the gall wasp Ophelimus migdanorum poses a risk to several Eucalyptus species in Colombia. In the tropical Andes, its biological development and the damage it causes can be influenced by climate, particularly rainfall. In this regard, we examined gall phenology, population fluctuation, and leaf damage caused by O. migdanorum, and its parasitoid Closterocerus chamaeleon, over 5 months at two sites with contrasting rainfall in peri-urban areas of Bogotá, Colombia. Gall phenology and foliar damage were assessed on 10 trees per site. We characterized gall phenology by assessing their size and color, wasps' developmental stages, as well as affected leaf area and gall density on the leaf blade. Additionally, the individuals found in five attraction traps at each site were quantified biweekly to record population fluctuations. The effect of rainfall on wasp frequency and gall density between sampling sites and dates was compared using the chi-square test, while the relationship with rainfall was evaluated using the Kruskal-Wallis test. Only females of the gall wasp and its parasitoid were observed during the study, displaying multivoltine behavior. Six developmental stages of the galls were differentiated, each characterized by distinct coloration. Drier microclimates favored gall size, wasps' development stage frequency, population trend, and foliar damage. The general trend indicated a greater abundance of the parasitoid C. chamaeleon compared to O. migdanorum. Our study suggests that O. migdanorum has a less damaging effect on E. globulus in areas with rainy microclimates.

哥伦比亚波哥大两个不同降雨参数地点的瘿蜂 Ophelimus migdanorum 及其寄生虫 Closterocerus chamaeleon 对球桉树的影响
作为一种害虫,五倍子蜂 Ophelimus migdanorum 对哥伦比亚的多个桉树品种造成危害。在热带安第斯山脉,其生物发展和造成的危害会受到气候,尤其是降雨量的影响。为此,我们在哥伦比亚波哥大近郊区降雨量对比强烈的两个地点,对O. migdanorum及其寄生虫Closterocerus chamaeleon造成的虫瘿物候学、种群波动和叶片损害进行了为期5个月的研究。对每个地点的 10 棵树进行了虫瘿物候和叶片损害评估。我们通过评估虫瘿的大小和颜色、黄蜂的发育阶段以及受影响的叶片面积和叶片上的虫瘿密度来确定虫瘿的物候特征。此外,我们每两周对每个地点的五个引诱诱捕器中发现的个体进行量化,以记录种群数量的波动。采用卡方检验比较了不同采样点和采样日期的降雨量对胡蜂发生频率和虫瘿密度的影响,并采用 Kruskal-Wallis 检验评估了降雨量与胡蜂发生频率和虫瘿密度的关系。研究期间只观察到瘿蜂及其寄生蜂的雌蜂,它们表现出多伏行为。虫瘿有六个发育阶段,每个阶段都有不同的颜色。干燥的小气候有利于虫瘿大小、瘿蜂发育阶段频率、种群趋势和叶片损害。总体趋势表明,寄生蜂 C. chamaeleon 的数量要多于 O. migdanorum。我们的研究表明,在微气候多雨的地区,O. migdanorum对球果桉的危害较小。
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来源期刊
Neotropical Entomology
Neotropical Entomology 生物-昆虫学
CiteScore
3.30
自引率
5.60%
发文量
69
审稿时长
6-12 weeks
期刊介绍: Neotropical Entomology is a bimonthly journal, edited by the Sociedade Entomológica do Brasil (Entomological Society of Brazil) that publishes original articles produced by Brazilian and international experts in several subspecialties of entomology. These include bionomics, systematics, morphology, physiology, behavior, ecology, biological control, crop protection and acarology.
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