ABSTRACT
Edible insects are currently promoted worldwide as an alternative animal protein source, but they are mostly still harvested from the wild where they are predisposed to contamination with agrochemicals. This study analysed six species of edible insects (Ruspolia differens, Rhynchophorus phoenicis, Schistocerca gregaria, Oryctes sp, Pachnoda ephippiata and Acanthoplus sp) collected from different habitats and/or reared in the laboratory in Kenya and Uganda for safety from agrochemical contaminants using liquid chromatography tandem mass spectrometry. The residue levels were statistically compared with the Codex Alimentarius Commission maximum residue limits (MRLs). Residues of only nine agrochemicals were detected in the insects out of 374 chemicals which were screened. The detected agrochemicals include two insecticides (aminocarb and pymetrozine), three herbicides (atraton, methabenzthiazuron and metazachlor) and four fungicides (carboxin, fenpropimorph, fludioxonil and metalaxyl). Ruspolia differens and adult Oryctes sp were free from detectable levels of any agrochemical. Whereas the pesticides residue levels in most insect samples were within maximum residue limits, some of them notably P. ephippiata from black soldier fly larval frass, R. phoenicis from oil palm and P. ephippiata from plant compost contained 2-, 8- and 49-fold higher levels of atraton, methabenzthiazuron and metazachlor, respectively, than MRLs. These findings demonstrate that edible insects may accumulate harmful residues of agrochemicals from the environment where they breed or forage, rendering them unsafe for human consumption or feeding animals. The mechanisms for possible bioaccumulation of these agrochemicals in the insects remains to be investigated. Development of methods for farming edible insects under regulated indoor conditions to ensure their safety as sources of food or feed is recommended.
ABSTRACT
Fourteen new species of the Afrotropical genus Thubdora Park, 2018 (Lecithoceridae: Torodorinae) are described from Uganda: Thubdora afropyralidis Park, sp. nov., T. fruticosa Park, sp. nov., T. kibalensis Park, sp. nov., T. klenodes Park, sp. nov., T. latidiscalis Park, sp. nov., T. mirinae Park, sp. nov., T. nemorosa Park, sp. nov., T. retusivalva Park, sp. nov., T. umbratilis Park, sp. nov., and T. wooriana Park, sp. nov. in the aciphalla species-group (10 species); and T. corystos Park, sp. nov., T. narusia Park, sp. nov., T. trigonoides Park, sp. nov., and T. villosiphalla Park, sp. nov. in the acutalis species-group (four species). Four species are reported for the first time from Uganda: T. ambliodes Park, 2018, T. bilobella Park, 2018, T. ealaensis Park De Prins, 2019, and T. ghesquierei Park De Prins, 2019; and the females of T. ealaensis and T. ghesquierei are newly described, and their genitalia are illustrated. In addition, three species of Ptilothyris Walsingham, 1897 previously recorded from DR Congo are transferred to Thubdora: T. brachysema (Meyrick, 1938), comb. nov., T. crocophracta (Meyrick, 1938), comb. nov., and T. nemophorella (Ghesquière, 1940), comb. nov. Lectotypes for T. brachysema and T. crocophracta are designated herein. Identifications of the new species and corresponding females were confirmed based on the comparison of COI barcode sequences. Adults and genitalia of all the new species and the three species transferred from Ptilothyris are illustrated.
Subject(s)
Moths , Animal Distribution , Animals , Congo , Female , Genitalia , UgandaABSTRACT
Forest-dependent biodiversity is threatened throughout the tropics by habitat loss and land-use intensification of the matrix habitats. We resampled historic data on two moth families, known to play central roles in many ecosystem processes, to evaluate temporal changes in species richness and community structure in three protected forests in central Uganda in a rapidly changing matrix. Our results show some significant declines in the moth species richness and the relative abundance and richness of forest-dependent species over the last 20-40 years. The observed changes in species richness and composition among different forests, ecological types, and moth groups highlight the need to repeatedly monitor biodiversity even within protected and relatively intact forests.