Larvae of sweetpotato weevil, Cylas formicarius (Fabricius). Figure 1. Larvae of sweetpotato weevil, Cylas formicarius (Fabricius). Photograph by James Castner . Brief summary. No one has contributed a brief summary to this page yet. Explore what EOL knows about Cylas formicarius. Add a brief summary to this page. C. formicarius adults feed on the epidermis of vines, scraping oval patches off young vines and petioles. Adults also feed on external surfaces of storage roots.
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Attelabus formicarius Fabricius, Brentus formicarius Fabricius, Cylas turcipennis Boheman, Size mm Identification Det.
Cylas formicarius – Wikipedia
Symptoms Top of page C. Larvae are about 0.
Please consider a year-end gift to BugGuide! Heterorhabditidae penetrate the soil and tubers, killing weevil larvae. Plastic film and rice straw mulch reduced weevil infestations as compared with non-mulched plots AVRDC, Flooding of infested fields was tested in Taiwan to induce rotting of the left-over plant cylxs and thereby reduce weevil densities from one planting to the next Talekar, In Cuba, predatory ants have been manipulated to the benefit of weevil management by transporting the ant nests temporarily to sweetpotato fields.
Distribution maps of pests, Series A, Map. Efforts to find resistant cultivars have been thwarted by the differences in weevil infestation among trials, locations, seasons, and at times among replicates of a single accession in a trial, among plants in the same plot, and even among storage roots within one plant Talekar,a.
Proceedings of the Association for Plant Protection of Kyushu, Apionidae in southern Florida. Breeding sweet potato for weevil resistance.
Introduction Because of its concealed feeding habits, C. Monitoring sweetpotato weevil Coleoptera: The head and mandibles are chitinized yellow to brown; mandibles are almost black. Pupation occurs in the potatoes. Establishment confirmed of the sweet potato weevil in Guadeloupe. Because of its potency and relatively long persistence, this chemical may be used in various ways to combat sweet potato weevil in an integrated programme Talekar, In one experiment in Taiwan, sweet potato was planted between two rows of each of 68 crop species and weevil infestations of the roots were monitored.
Sforzi, Alessandra; Bartolozzi, Luca, eds. Other cultural practices which may help reduce weevil damage and which are often advocated are: In a laboratory study, Mullen found pupal period duration formicariua 5 to Pest control for cassava and sweet potato. In this manner it is possible to eradicate the weevil with concentrated efforts. Control achieved by post-plant applications appears to be due to mortality of weevil adults searching clas feeding or oviposition sites.
Pupation occurs in the potatoes.
At least in the soils of southern Florida, the infective dormicarius are persistent, remaining active for up to four months. Adult sweetpotato weevil, Cylas formicarius Fabricius. Integrated control of sweetpotato weevil. Bogor Research Insititute for food crops. The biology of the sweet potato weevil.
Journal of Chemical Ecology, 12 6: Unpublished discussion paper For the successful control of the weevil, these two weevil sources must be attended to.
A,V, p. Host-Plant Resistance For,icarius the past 50 years, numerous cyla have been made to find sources of resistance mainly to Cylas species and to incorporate the resistance in agronomic cultivars. Associations between the plant family Convolvulaceae and Cylas weevil. Views Read Edit View history. Insect pests of sweet potato. Journal of Economic Entomology, 91 2: Entomologia Experimentalis et Applicata, 51 1: Moriya S, Hiroyoshi S, Few areas in the above regions where sweet potato is grown are free from its destruction.
The long snout is bent towards the ventral side. However, in areas where sweet potato is a staple food and is planted year-round, rotation is not always possible.
Recent findings in Taiwan showed that the cuttings cm long taken from fresh terminal growth, even from an infested crop, were rarely infested with weevils, whereas older portions of the stem were. Madras Agricultural Journal, Developments in Plant Genetics and Breeding No.
Cylas formicarius (sweet potato weevil)
The mature larva excavates a cell 2 to 3 times the size of its body in which pupation occurs. Sex pheromone of the sweetpotato weevil, Cylas formicarius elegantulus laboratory bioassay and evidence for a multiple component system.
Annual Progress ReportTrivandrum, India: