Agri 2022

Seed beetle bruchidius terrenus in biocontrol of leguminous host plant and its parasitoids in republic of serbia

Renata Gagic Serdar

Renata Gagic Serdar, Speaker at Agriculture Conferences
Institute of Forestry, Serbia
Title : Seed beetle bruchidius terrenus in biocontrol of leguminous host plant and its parasitoids in republic of serbia


Research shows that seed-beetle Bruchidius terrenus (Sharp) Coleoptera: Bruchinae, appears to be proven as a suppressor of generically potential of introduced leguminous Albizia julibrissin, Durazz in Serbia, and after analysis, in serious and significant number. This weevil has been proven as a monophagous species in Serbia. The name of the species in the Serbian language, according usually for taxonomic affiliation and the host plant, is mentioned for the first time in our research as a Persian silk tree, or pink silk tree seed beetle. Adults were first found in 2013, but studios research started in next years after findings in Autonomous Province of Vojvodina (Serbia on Balkan Peninsula) with the observation of insects wintering in adult stage, waiting for the silk tree flourishes from June to August. The pods become fully ripe from September and start falling during October and November. In 2019, the young adults start emergence of matured pods (this is the latest stage of ripening) in late summer. In the same period, parasitoids appear for the first time. These Bruchine can be considered as successfully adapted, and with regard to the host, i.e. with high potential they could be used as bio agent against host plant uncontrolled spreading. Different standard entomological methods were used to rear adults and monitoring of larval development. The data on the percentage of infestation for the seasons: 2018, 2019, 2020, varied in the results of the dissection of pods (seeds) and one seed - one glass flacon laboratory cultivation up to the maximum of 88 % of all TIS (Total number of Infested Seeds), summarised in different larval stages plus imago’s showed from emerge holes).Parasitoids were determined by using interactive act keys.

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