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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Title Larva Caption Sweet potato weevil larva. Photograph by James Castner, University of Florida. Efectividad tecnico – economico del empleode la hormiga leona Pheidole megacephala en el control del tetuan de boniato Cylas formicarius elegantulus. Hahn SK, Leuschner K, Two or more weeks of flooding considerably reduced the emergence of volunteer sweet potato plants.
Occasionally adult weevils feed on leaves chewing away portions of leaf lamina or scraping small patches of major veins and petioles.
Applied Entomology and Zoology, 17 3: Eggs are laid singly in small cavities eaten out in the stem or tuber. International Potato Center, The sweet potato weevil and its control. Thus, maintenance of moist soil with irrigation is helpful for weevil management. Among the 15 wasp parasitoids of C. From Wikipedia, the free encyclopedia. Proceedings of a National Workshop, Ofrmicarius, Kenya.
Intercropping Little research information is available on this approach for the management of sweet potato weevil. Antennae have 10 segments.
In Uganda, Smit showed that when the crop was harvested all at once, the percentage of damaged roots increased linearly the longer the harvest was delayed. Central Tuber Crops Research Institute, Insect Pests of Burma. Pre-plant application Pre-plant insecticide applications have been used to exterminate weevils from the planting material vine cuttings before planting.
Discussion View source History. Under simulated field conditions, nematodes belonging to genera Steinernema and Heterorhabditis have been pathogenic foormicarius C. Upcoming Events Discussioninsects and people from the BugGuide Gathering in VirginiaJuly Photos of insects and people from the gathering in WisconsinJuly Photos of insects and people from the gathering in VirginiaJune This method of control, however, requires frequent applications in order to kill adults that might migrate from other areas.
Pheromone-trap monitoring system for sweetpotato weevil Coleoptera: Among the three predators only Pheidole megacephala is reported to be an effective natural control agent of C. Strains of the fungus Formicarihs bassiana that are pathogenic to sweetpotato weevil have been identified, and can be effective is there is adequate soil moisture.
In Penghu Island, Taiwan, Talekar et al. It has been shown in Taiwan that the removal of alternative hosts and volunteer sweet potato plants reduced the level of weevil infestation Talekar, With the exception of biological control and applications of insecticides, all other cylaas measures are fully compatible. Journal of Economic Formivarius, The full-grown apodous larva is 7.
The effectiveness of the pheromone trap has let to experimentation of traps that auto-infect with Beauveria bassiana fungus when the male weevils visit the trap. In other projects Wikimedia Commons Wikispecies.
Planting weevil-resistant sweet potato cultivars also represents a potential cultural control method, however, a cultivar with a reliable level of resistance to the weevil is not yet available Talekar, b.
Cylas formicarius – Bugwoodwiki
However, a combination of tactics can give satisfactory control of the pest. Alternatively all Ipomoea can be eliminated for one cropping season and allowed to grow in the subsequent seasons, once the area is free of the weevil.
Udhibiti wa bungua viazi kwa kutumia marejea. The physical cover made by mulching materials further reduced access of roots to the weevil even if the soil cracked.
This chemical has great potential for attracting male sweet potato weevils Proshold et al.
The body, legs, and head are long and thin, giving it an ant-like appearance. Duration cylws the egg stage varies from about five to six days during the summer to about 11 to 12 days during colder weather.