Population dynamics of fly insects in citrus orchards in Lishui

doi:10.16178/j.issn.0528-9017.20250568

Abstract

Abstract:

Fly insects are important pests in the citrus industry. In order to understand the occurrence pattern of fly insects in Lishui area，three representative citrus orchards were selected to use pheromone-baited traps and fly adhesive boards for trapping pests. The results showed that three species of fly insects in Lishui orchards：Bactrocera dorsalis，Zeugodacus tau，and Z. scutellatus，were trapped，with the first two being the dominant species. B. dorsalis peaked synchronously with citrus maturity，identifying it as the primary yield-reducing pest. Z. tau persisted year-round but developed a single distinct peak from late November to early December due to climatic constraints. This peak occurred later than the maturity period of citrus and did not overlap with B. dorsalis，causing no economic damage. Z. scutellatus accounted less than 3.0% of the total trapped population，warranting no specific control measures. Population dynamics were consistent across all monitoring sites. This study systematically elucidates the occurrence pattern of fly insects for the first time in citrus orchards in Lishui，providing reference for the prevention and control of fly insects in the local area.

Key words: Bactrocera dorsalis, Zeugodacus tau, population dynamics, citrus, Lishui

CLC Number:

S433

HU Manfei, YAN Fuhua, LI Yang, YANG Xianyu, WU Lianhai. Population dynamics of fly insects in citrus orchards in Lishui[J]. Journal of Zhejiang Agricultural Sciences, 2026, 67(9): 2230-2234.

Figures/Tables 5

Table 1 The number of fly insects in citrus orchards in Lishui from 2023 to 2024

监测点	年份	捕获成虫数	橘小实蝇		南亚果实蝇		具条实蝇
监测点	年份	捕获成虫数	数量	占比/%	数量	占比/%	数量	占比/%
莲都区	2023	29 975	24 652	82.2	5 123	17.1	200	0.7
莲都区	2024	3 995	2 092	52.4	1 834	45.9	69	1.7
松阳县	2023	18 507	10 233	55.3	7 350	39.7	924	5.0
松阳县	2024	2 471	131	5.3	2 130	86.2	210	8.5
缙云县	2023	28 056	14 320	51.0	13 300	47.4	436	1.6
缙云县	2024	13 413	192	1.4	12 984	96.8	237	1.8
合计	2023	76 538	49 205	64.3	25 773	33.7	1 560	2.0
	2024	19 879	2 415	12.1	16 948	85.3	516	2.6

Fig.1 Annual occurrence dynamics of Bactrocera dorsalis adults in Citrus sinensis and Citrus unshiu orchards from 2023 to 2024

Fig.2 Annual occurrence dynamics of Bactrocera dorsalis adults under different cultivation modes from 2023 to 2024

Fig.3 Annual occurrence dynamics of Bactrocera dorsalis adults in citrus orchards and citrus-peach interplanting orchards from 2023 to 2024

Fig.4 Annual occurrence dynamics of Zeugodacus tau adults in citrus orchards from 2023 to 2024

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