Showing papers on "Uroleucon published in 2021"
6 citations
31 Dec 2021
TL;DR: The list of aphid species (Hemiptera, Aphididae) that are known in the Aysen region of General Carlos Ibanez del Campo (Chile) is presented, it consists of 61 species.
Abstract: espanolSe presenta la lista de las especies de pulgones o afidos (Hemiptera, Aphididae) que se conocen en la region de Aysen del General Carlos Ibanez del Campo (Chile), formada por 61 especies. De ellas, 49 se conocian en la region a finales de 2019, y 12 se citan ahora por primera vez como consecuencia del estudio de ejemplares colectados durante enero de 2019. Uroleucon patagonicum se cita por primera vez en Chile. Se precisan las provincias (Aysen, Capitan Prat, Coyhaique y General Carrera) en las que cada una de las especies ha sido citada previamente o se cita por vez primera. EnglishThe list of aphid species (Hemiptera, Aphididae) that are known in the Aysen region of General Carlos Ibanez del Campo (Chile) is presented, it consists of 61 species. Of them, 49 were known in the region at the end of 2019, and 12 more are cited for the first time, as a result of the study of specimens collected during January 2019. Uroleucon patagonicum is recorded for the first time in Chile. The provinces (Aysen, Capitan Prat, Coyhaique and General Carrera) in which each of the species has been previously cited or cited for the first time are specified.
2 citations
TL;DR: Based on the preference with the host plant, some orders have a distribution according to the site, but also, the variety, Hymenoptera and Hemiptera are more abundant on the purple variety than on the white variety, and both are less abundant compared to those at Nlong-mvolye.
Abstract: Vernonia calvoana is a culture spread across the world and prized for its culinary and medicinal virtues. The data was collected in Yaounde, Central Cameroon region through manual harvesting at two stations from 2017 to 2019. A total of 168 species or morphospecies belonging to 47 families and 12 orders from two phyla were collected. The most abundant phylum was Arthropoda which represented 99.96% of the total number of all species, while Mollusca represented the rest. Within arthropoda, insecta class was found the most dominant. In Insecta, Formicidae and Aphididae were the most frequent families. At Nkolbisson, Hymenoptera and Hemiptera are more abundant on the purple variety than on the white variety. However, both are less abundant compared to those at Nlong-mvolye. The species Uroleucon compositae (37.01%), Hilda cameroonensis (4.67%) and Sphaerocoris annulus (2.71%) were the most abundant species recorded in all the three variants. Depending on the preference with the host plant, some orders have a distribution according to the site, but also, the variety.
Key words: Manual harvest, insecta, hymenoptera, hemiptera, Nkolbisson, Nlong-mvolye.
1 citations
TL;DR: In this article, the effects of previous exposure of plants to the safflower aphid, Uroleucon carthami, cotton bollworm, Helicoverpa armigera, and mechanical wounding on subsequent SAFFlower infestations using commercial SAfflower (Carthamus tinctorius) cultivars and wild SAffflower species (C. oxyacantha).
Abstract: Plants have a variety of defense mechanisms that are often induced following attacks by herbivores; this benefits those plants by decreasing performance or preference of herbivores that attack the plants later. We investigated the effects of previous exposure of plants to the safflower aphid, Uroleucon carthami, cotton bollworm, Helicoverpa armigera, and mechanical wounding on subsequent safflower aphid infestations using commercial safflower (Carthamus tinctorius) cultivars and wild safflower species (C. oxyacantha). The experiments were conducted in a greenhouse with two treatments: previously induced plants via direct herbivory or mechanical wounding, and control plants that had never experienced herbivory. To test the performance of safflower aphid on different plant treatments, five unwinged aphids were placed on each plant and allowed to reproduce for 14 days. Finally, the total numbers of aphids on each plant were counted and the percentage of produced winged individuals was calculated. The number of aphids on plants that were previously infested or injured was significantly lower than in control plants. Percentage of winged aphids was significantly higher on induced plants, which is an indicator for unsuitable conditions. Also, significant increase in total phenolic content and hydrogen peroxide was observed in induced plants, showing that the levels of these compounds were either treatment, cultivar and/or genotype × treatment dependent, highlighting the specificity of these interactions. Overall, among the safflower cultivars the lowest number of aphids and the highest percentage of winged aphid individuals were observed on Mahali-Isfahan cultivar and wild safflower, showing that this cultivar is more sensitive to herbivory and/or responds to it more than other cultivars. These findings could contribute to a better utilization of induced defense in the integrated pest management of safflower fields.
1 citations
TL;DR: An apterous viviparous female of a new aphid species Uroleucon (U Roleucon) bulgaricum sp.
Abstract: An apterous viviparous female of a new aphid species Uroleucon (Uroleucon) bulgaricum sp. n. is described and compared with the similar species U. (Uroleucon) achilleae (Koch, 1865). The new species was collected by the late J. Holman in the Blagoevgrad region (SE Bulgaria), where it is associated with Achillea coarctata Poiret in Lam. (Asteraceae). The similarities and differences between other Achillea-feeding Uroleucon species are discussed. A morphological key to the species of the subgenus Uroleucon Mordvilko, 1914 in Bulgaria is presented. A modified key to the Achillea-feeding Uroleucon aphids of Blackman and Eastop is also provided.
TL;DR: Two species of Uroleucon (Hem., Aphididae, Aphidinae, Macrosiphini) are described from specimens collected on South American indigenous composites in the Aysen del General Carlos Ibanez del Campo region (Chile), which is located between parallels 43o 38’ 22” S and 49o 09’ 50’ S.
Abstract: Two species of Uroleucon (Hem., Aphididae, Aphidinae, Macrosiphini) are described from specimens collected on South American indigenous composites in the Aysen del General Carlos Ibanez del Campo region (Chile), which is located between parallels 43o 38’ 22” S and 49o 09’ 50” S. Uroleucon chiliotrichi sp. n. is described from apterous viviparous females found on Chiliotrichum diffusum. Uroleucon amigoi sp. n. is described from apterous and alate viviparous females and oviparous females found on Adenocaulon chilense. Differences between these and morphologically similar South American species are presented.
urn:lsid:zoobank.org:pub:980349B5-EDBA-4FBC-8308-1ECE0215825C