Seasonal host transfer patterns of Apolygus lucorum in southern Xinjiang agroecosystem
In order to clarified the population dynamics of Apolygus lucorum in main host,and their intra-seasonal host plant species in the agricultural landscapes in southern Xinjiang,we conducted an annual investigation of the population dynamics of A.lucorum on 55 plant species in 23 common families in the agriculture ecosystem using the sweep net method in 2021,and monitored the occurrence of A.lucorum adult population in jujube orchards and cotton fields using yellow sticky traps from 2019 to 2021 in the Aksu region.A.lucorum had five generations in the investigation area and exhibited an obvious host transfer phenomenon.The first and second generations(mid-May to early July)mainly hosted on jujube trees,and the second generation adults started to move out of jujube orchards at the end of the flowering period of jujube trees.The third and fourth generations(early July to mid-September)mainly foraged in cotton fields,and the fifth generation(early September to mid-October)moved back to jujube orchards.In addition to jujube and cotton,the host plants of the first generation of A.lucorum include Glycyrrhiza uralensis,Chenopodium album,Brassica napus while the host plants of the second and third generations include Melilotus albus,Melilotus officinalis,G.uralensis,C.album,B.napus,Alhagi camelorum,Polygonum aviculare,Medicago sativa,etc.The host plants of the fourth and fifth generations include Artemisia caruifolia,A.argyi,M.albus,B.napus,P.aviculare,etc.Population dynamics of A.lucorum adults in cotton and jujube fields were consistent with the above findings.The above results provided an important scientific basis for the monitoring and scientific control of A.lucorum in ecological systems dominated with fruit and cotton in southern Xinjiang.
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