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Abundance and community composition of flower visiting insects of avocado ( Persea Americana Mill) in the East African region
International Journal of Tropical Insect Science ( IF 1.2 ) Pub Date : 2021-02-20 , DOI: 10.1007/s42690-021-00463-1
Evelyn N. Okello , Nelson O. Amugune , Titus K. Mukiama , H. Michael G. Lattorff

Pollination of avocado flowers is essential for fruit production and is facilitated by various insect taxa. Currently, there is limited information available on the community structure of the pollinators of avocado crops in East Africa. We duly present the distinct groups of insects visiting avocado flowers across two most important avocado producing countries in the East African region. Insects were swept from avocado flowers along transects and sorted by morphological features that classified them into orders, families, and genera. Five common orders were identified, namely: Coleoptera, Diptera, Heteroptera, Hymenoptera, and Lepidoptera. The relative abundance of Hymenoptera and Diptera were highest (49% and 22% respectively) hence we further identified them to the families and genera taxonomic groups. Three Dipteran families were found (Calliphoridae, Muscidae, and Syrphidae) from which we recognized five genera: Chrysomya, Spilogona, Eristalinus, Phytomia and Syritta. Hymenoptera on the other hand were placed into two general groups; bees and wasps. For bees, family Apidae was represented by Apis, Ceratina, Meliponula, and Xylocopa whereas seven diverse wasp families (Braconidae, Philanthidae, Vespidae, Ichneumonidae, Eumeninae, Thynnidae and Pompilidae) were also noted. The occurrence of Coleoptera and Lepidoptera varied across the three orchards while the rest of the orders remained unaffected. We further recorded the insect’s potential pollinator functions and concluded that the main pollinators of avocado flowers in the region are members of Syrphidae and Apidae families. This information serves as a foundation for avocado pollination studies in the East African region that are important for improving pollination services and insect pollinators’ conservation.



中文翻译:

东非地区鳄梨(Persea Americana Mill)花访昆虫的数量和群落组成

鳄梨花的授粉对于水果生产必不可少,并且通过各种昆虫类群得以促进。当前,关于东非鳄梨作物授粉媒介的社区结构的信息很少。我们适当地介绍了在东非地区两个最重要的鳄梨生产国中访问鳄梨花的昆虫的不同种类。将昆虫从鳄梨花上沿样条清扫干净,然后按形态特征将昆虫分类,将其分为顺序,科和属。确定了五个常见的,即:鞘翅目,双翅目,异翅目,膜翅目鳞翅目。 膜翅目双翅目的相对丰度最高(分别为49%和22%),因此我们进一步将它们识别为家庭和属类分类群体。发现了三个Dipteran家族(Calliphoridae,MuscidaeSyrphidae),从中我们识别出五个属:金霉菌,螺旋藻,Eristalinus,Phytomia和Syritta。另一方面,膜翅目被分为两个大类。蜜蜂和黄蜂。在蜜蜂方面,以蜜蜂科,蜜蜂科蜜蜂科 和 木虱为代表的蜜蜂是 蜂科,而七个不同的黄蜂科((科、,科,维斯皮科、,科,ida科,胸腺科Po科))也被注意。三个果园中鞘翅目鳞翅目的发生情况各不相同,而其余顺序则不受影响。我们进一步记录了该昆虫的潜在传粉媒介功能,并得出结论,该地区鳄梨花的主要传粉媒介是SyrphidaeApidae家族的成员。该信息为东非地区鳄梨授粉研究的基础,这对改善授粉服务和昆虫授粉者的保护至关重要。

更新日期:2021-02-21
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