Effects of Organic and Conventional Farming on Lady Beetle Diversity, Dominance, and Temporal Stability in Indian Jujube Orchards
Other Title
有機與慣行農法對印度棗果園瓢蟲多樣性、優勢度與時間穩定性的影響
Journal
台灣農業研究
Journal Volume
75
Journal Issue
2
Start Page
217
End Page
230
ISSN
2790-086X
Date Issued
2026-06-04
Author(s)
鳳山熱帶園藝試驗分所
農業部農業試驗所
農業部農業試驗所
農業部農業試驗所
農業部農業試驗所
Abstract
Enhancing our understanding of how lady beetle biodiversity responds to organic and conventional farming is essential for sustainable pest management in tropical fruit systems. This study aims to compare the composition and interannual variation of lady beetle assemblages across different farming practices to assess the long-term differences in natural enemy assemblages in tropical orchards under organic and conventional management. From 2020 to 2024, lady beetle assemblages were surveyed in organically cultivated (OC) and conventionally cultivated (CC) Indian jujube orchards in Yanchao, Kaohsiung. A total of 20 species were recorded in OC orchards and 11 species in CC orchards. Sasajiscymnus tainanensis was the dominant species in both systems, and several species, including Cheilomenes sexmaculata and Cryptogonus orbiculus, were more abundant in OC orchards. The mycophagous species Illeis koebelei occurred exclusively in OC orchards. Mean species richness and total abundance per survey were significantly higher in OC orchards (P < 0.05 for both metrics). Shannon diversity was significantly greater in OC orchards, whereas Berger-Parker dominance did not differ between systems. Annual total abundance was consistently higher in OC orchards, with a significant OC-CC difference detected only in 2021. Temporal variability at the community level was higher in OC orchards (coefficient of variation; CV = 0.753) than in CC orchards (CV = 0.424), indicating lower interannual stability under organic management, reflecting the natural response of the population to changes in prey resources under low pesticide disturbance. These results provide multi-year empirical evidence of distinct community patterns of lady beetles under different farming systems in subtropical fruit orchards, which can serve as a basis for ecological monitoring and planning pest management strategies.
增進我們對瓢蟲生物多樣性如何應對有機與慣行農法的瞭解，對於熱帶果樹系統的永續性害蟲管理至關重要。本研究旨在比較不同耕作方式下瓢蟲群聚 (assemblages) 之組成與年際變動特性，以評估熱帶果園天敵群聚在有機 (organically cultivated; OC) 與慣行 (conventionally cultivated; CC) 管理下之長期差異。2020−2024年於高雄燕巢印度棗園進行調查，OC 園共記錄 20 種瓢蟲，顯著高於 CC 園之 11 種。兩類型園區的優勢種皆為臺南方瓢蟲 (Sasajiscymnus tainanensis)，而變斑隱勢瓢蟲 (Cryptogonus orbiculus) 與六條瓢蟲 (Cheilomenes sexmaculata) 在 OC 出現較高豐度，食菌性的黃瓢蟲 (Illeis koebelei) 則僅見於 OC 園。每次調查之平均物種豐富度與總豐度在 OC 園皆顯著高於 CC 園 (P < 0.05)。OC 園之 Shannon 多樣性 (H') 亦高於 CC 園，而 Berger-Parker 優勢度指數在兩類型間無顯著差異。年總豐度在五年間皆以 OC 園較高，僅 2021 年兩者差異達顯著水準。年際變動方面，OC 園之群聚變異係數 (coefficient of variation; CV = 0.753) 高於 CC 園 (CV = 0.424)，顯示其瓢蟲群聚具有較大的年際波動，反映在低藥劑干擾下族群對獵物資源變化的自然回應。本研究提供熱帶果樹系統中不同耕作管理對瓢蟲群聚多年期差異之實證資料，可作為生態監測及害蟲管理策略規劃之基礎。
Subjects
Coccinellidae
Biological control
Predator assemblages
Agricultural intensification
Ecosystem services
瓢蟲科
生物防治
捕食者群聚
農業集約化
生態系服務
Publisher
農業部農業試驗所
Type
journal article
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