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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In Florida, where P. Asian Vegetable Research and Development Center. In Penghu Island, Taiwan, Talekar et al.

Cylas formicarius

Other cultural practices which may help reduce weevil damage and which are often advocated are: It also favors development of fungal diseases of weevils. In Sweet Potato Cultivation in China. Sutherland b listed 30 such species and four additional ones were recently found to harbour the weevil in Taiwan AVRDC, Larvae are legless, white to cream colored with a pale brown head.

Efectividad tecnico – economico del empleode la hormiga leona Pheidole megacephala en el control del tetuan de boniato Cylas formicarius elegantulus.

More research on the effects of intercropping on weevil damage and root yield is needed. An IPM approach for sweet potato weevil. International Development Research Centre, Daily locomotor activity in the Indian sweet potato weevil, Euscepes postfasciatus Fairmaire Coleoptera: Due to the long duration of the plant growth period, it is not uncommon for preplant or planting time applications to be followed by one or more insecticide applications to the plant or soil at mid season.


Distribution of sweetpotato weevil in fields is aggregated.

Cylas formicarius – Wikipedia

For example, in Taiwan, less damage by C. Influence of sweetpotato weevil infestation on the yields of twelve sweet potato lines. Sweet potato weevil control was formkcarius in a field planted away from a weevil-infested field, whereas the tubers were heavily infested when the fields were adjacent to each other.

Entomologia Experimentalis et Applicata, 51 1: For the successful control of the weevil, these two weevil sources must be attended to. Flight time and flight age in the sweet potato weevil, Cylas formicarius Fabricius Coleoptera: Destruction of crop residues Destroying any crop residues left in the field after harvest is important because weevils survive in roots and stems and infest succeeding or neighbouring sweet potato plantings Chittenden, ; Franssen, ; Eddy et al.

Dry soil leads to cracking of the soil, which is a favorable environment for weevils.

International Journal of Pest Management, 41 1: Adults mate soon after emergence but oviposition does not occur for a minimum of 4. Farmers’ cultural practices and their effects on pest control in sweetpotato in south Nyanza, Kenya.

Plastic film and rice straw mulch reduced weevil infestations as compared with non-mulched plots AVRDC, HortonUniversity of GeorgiaDepartment of Entomology. A complete life cycle requires one to two months, with 35 to 40 days being common during the summer months.

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Sweetpotato weevil is the most serious pest of sweet potato, not only in the United States, but around the world. Miyaji K, Tanaka T, The usefulness of crop rotation with rice in controlling the weevil was investigated in two experiments, each lasting months in Taiwan Talekar, Control of alternative hosts Several species of Cypas in addition to sweet potato, and a few related convolvulaceous plants are also alternative hosts of C.

Sweetpotato Weevil, Cylas formicarius Fabricius Coleoptera: Few areas in the above regions where sweet potato is grown are free from its destruction. However, the plants exhibited some compensatory ability, with the relationship between vine damage and yield non-linear, and sometimes not significant.

Feasibility of the use of resistant cultivar in sweetpotato weevil control. Eggs hatch in less than a week and larvae feed inside formicarus two to three weeks. Control of the sweet potato weevil in Puerto Rico. Privacy policy About Bugwoodwiki Disclaimers. These chemicals, most of which were applied as post-planting foliar sprays, resulted in varying levels of control.

Hardly any efforts have been made to introduce these natural enemies to combat sweet potato weevils.

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