Showing papers on "Dacus published in 2021"
TL;DR: In this article, the complete mitogenome of D. vijaysegarani from Malaysia was annotated and the complete mitochondrial genome was sequenced by next generation sequencing to determine its features and phylogenetic relationship.
Abstract: Tephritid fruit flies of the genus Dacus are members of the tribe Dacini, subfamily Dacinae. There are some 274 species worldwide, distributed in Africa and the Asia-Pacific. To date, only five complete mitochondrial genomes (mitogenomes) of Dacus fruit flies have been published and are available in the GenBank. In view of the lack of study on their mitogenome, we sequenced (by next generation sequencing) and annotated the complete mitogenome of D. vijaysegarani from Malaysia to determine its features and phylogenetic relationship. The whole mitogenome of D. vijaysegarani has identical gene order with the published mitogenomes of the genus Dacus, with 13 protein-coding genes, two rRNA genes, 22 tRNAs, a non-coding A + T rich control region, and intergenic spacer and overlap sequences. Phylogenetic analysis based on 15 mitochondrial genes (13 PCGs and two rRNA genes), reveals Dacus, Zeugodacus and Bactrocera forming a distinct clade. The genus Dacus forms a monophyletic group in the subclade containing also the Zeugodacus group; this Dacus-Zeugodacus subclade is distinct from the Bactrocera subclade. D. (Mellesis) vijaysegarani forms a lineage with D. (Mellesis) trimacula in the subcluster containing also the lineage of D. (Mellesis) conopsoides and D. (Callantra) longicornis. D. (Dacus) bivittatus and D. (Didacus) ciliatus form a distinct subcluster. Based on cox1 sequences, the Malaysia and Vietnam taxa of D. vijaysegarani may not be conspecific. Overall, the mitochondrial genome of D. vijaysegarani provided essential molecular data that could be useful for further studies for species diagnosis, evolution and phylogeny research of other tephritid fruit flies in the future.
9 citations
TL;DR: The nano-magnesium and nano-titanium oxide have a significant effect on the cumulative mortality of larvae of Dacus ciliatus and Dacus frontalis, increasing the death rate up to 92% and 82% respectively at a concentration of 0.500 ml / liter.
Abstract: The study deals with studying the effect of various concentrations of magnesium oxide and nanium titanium on the increasing death rate of the larvae related to two kinds of cucurbit fruit Dacus ciliatus and Dacus frontalis, where three concentrations of both ingredients are used: 0.125, 0.250 and 0.500 ml / L after mixing them with (1) ml of the insecticide malathion and (1) liters of distilled water in addition to the concentration (0.00), which denotes (1) ml of pesticide malathion with one liter of distilled water for the purpose of comparison and knowledge of the effect of the nanomaterial on the increasing death rate of the larvae of the two species, and the results indicated statistical analysis that the highest percentage of larval decay in both species when using Nano-magnetic oxide is at a concentration of 0.500 ml / liter which is 92% and 82% respectively, while using titanium oxide for the same concentration the highest percentage is equal to 90% and 85% respectively , the concentration gave increasing death rate for the larvae of both kinds ranging between 65-55%, and the rate of exclusion of the larvae after combat and in both kinds has reached only 10% of the total combat samples against a death rate of about 90%, and this is proof of the effect. The great t for the two nanostructures on the larval role of the two species.
6 citations
4 Mar 2021
TL;DR: In inventory and identification of fruit flies species of the Dacini tribe in Central Bangka Regency, Bangka Belitung, and in Nibung, Penyak, and Terentang Villages, 3 genera and 14 species of fruit fly were obtained from the tribe DACini.
Abstract: Distribution and identification of fruit flies (Diptera: Tephritidae) attracted on methyl euganol and cue lure in CentralBangka Regency, Bangka Belitung. Not all fruit flies species of Dacini tribe were pests to fruit and fleshy vegetables. CentralBangka Regency is one of the citrus producer in the Bangka Belitung Islands Province. Information about this fruit flies in thisarea was limited. This study aimed to make inventory and identification of fruit flies species of the Dacini tribe in CentralBangka Regency, Bangka Belitung. The research was conducted in Nibung, Penyak, and Terentang Villages in Central BangkaRegency, Bangka Islands. Lynfield traps were installed in a citrus cultivation area about 1.5 m above ground level. Lynfieldtraps were treated with the attractant and deltamethrin (2: 1; v / v) on dental cotton. Methyl eugenol and cue lure were usedto attract the male fruit flies. In Central Bangka Regency, 3 genera and 14 species of fruit flies were obtained from the tribeDacini. The fruit fly species of Bactrocera atrifemur, B. carambolae, B. dorsalis, B. occipitalis, and B. umbrosa were caughtin the methyl eugenol attractant trap. Meanwhile, the fruit fly species of B. albistrigata, B. fuscitibia, B. melastomatos,B. neocognata, B. nigrotibialis, Dacus nanggalae, Zeugodacus apicalis, Z. caudatus, and Z. cucurbitae were caught in thecue lure attractant trap. The fruit flies obtained from the two different attractants were used to develop dichotomous keys.
2 citations
TL;DR: A snap-shot survey of Dacine fruit flies carried out on three of the Solomon Islands in April 2018 is reported in this article, using traps baited with the male lures cue-lure, methyl eugenol, and zingerone.
Abstract: Results from a snap-shot survey of Dacine fruit flies carried out on three of the Solomon Islands in April 2018 are reported. Using traps baited with the male lures cue-lure, methyl eugenol, and zingerone, 30 of the 48 species previously known to occur in the Solomon Islands were collected. Six species are newly described here: Bactroceraallodistinctasp. nov., B.geminosimulatasp. nov., B.kolombangaraesp. nov., B.quasienochrasp. nov., B.tsatsiaisp. nov., and B.vargasisp. nov., all authored by Leblanc & Doorenweerd. An illustrated key to the 54 species now known to be present in the country is provided.
2 citations
TL;DR: A new species of Euphranta, E. flavothoracica David, Hancock & Sachin, sp. n. is described from India and placed in the zeylanica group of species.
Abstract: A new species of Euphranta, E. flavothoracica David, Hancock & Sachin, sp. n. is described from India and placed in the zeylanica group of species. Postabdominal structures of E. cassiae (Munro), E. crux (Fabricius) and E. klugii (Wiedemann) are described. A revised key to the 16 species of Euphranta known from India is provided. A new generic and specific synonymy is established: Euphranta Loew, 1862 = Ichneumonomacula Chen, 2020, syn. n. and Dacus figuratus Walker, 1856 (=Euphranta figurata (Walker, 1856))= Ichneumonomacula wangyongi Chen, 2020, syn. n.
TL;DR: This baseline study analysed the biodiversity of fruit fly species, in mango orchards, in different ecological zones of Togo to constitute an essential reference in the future evaluation of the effectiveness of any control activities initiated in Togo against fruit flies.
Abstract: The production and marketing of fruits, especially mango, in sub-Saharan Africa are threatened by fruit flies (Diptera: Tephritidae). This baseline study analysed the biodiversity of fruit fly species, in mango orchards, in different ecological zones of Togo. Traps used to monitor the flies in the orchards consisted of dry baits, made from four types of parapheromones specific to the males of different species. Forty species of fruit flies were identified in the mango orchards in Togo. The most common species were Bactrocera dorsalis (Hendel), Ceratitis cosyra (Walker), Ceratitis fasciventris (Bezzi), Ceratitis capitata (Wiedemann), Ceratitis bremii Guerin-Meneville, Dacus bivittatus (Bigot), Dacus humeralis (Bezzi), Dacus punctatifrons Karsch and Zeugodacus cucurbitae (Coquillett). The invasive B. dorsalis and the endogenous species, C. cosyra were dominant in the mango producing areas of Togo because their prevalence were very high (B. dorsalis: 2.1 ≤ flies per trap per day (FTD) ≤ 472.2; C. cosyra: 0.34 ≤ FTD ≤ 97.28). There was no area free from fruit flies in Togo during the study. These results constitute an essential reference in the future evaluation of the effectiveness of any control activities initiated in Togo against fruit flies.
22 Jul 2021
TL;DR: The melon fly (Dacus cucurbitae) was first recorded in Guam in 1936, with infestations found in several gardens, and was likely introduced recently, with limited spread and no reported damage to major cucumber growers.
Abstract: 20.Dacus cucurbitae Coquillett, Ent. News 10: 129, 1899. This is the notorious melon fly which was described on material from Hawaii, where it appeared as an immigrant cucumber and melon pest prior to 1899. It has also been recorded in India, Ceylon, Java, Timor, Philippines, Singapore, southern China, Japan and Australia. It was first discovered in Guam on November 7, 1936, when we found infested cucumbers in a school garden at Piti. From these cucumbers, 161 flies issued on November 16 to 18. Apparently it was of somewhat recent introduction in Guam and had not yet become widely spread, for the principal cucumber growers had not reported any injury by it. Search for the pest was made in November in various districts of Guam. In a garden on the plateau above Agana, one malformed cucumber was found which showed injury by the maggots, and two small pumpkins were infested with maggots. On November 21, at the Agana vegetable market, an infested cucumber was found which had come from a Talofofo garden. No evidence was found of the pest in other localities at that time.