sweet potato borer

It is estimated that SPVD causes yield loss up to 80 - 90%.

Vasquez and Laos, Burma (Myanmar), and Thailand. Philippine Hilling-up is effective when the holes that provide the adults with an Attack at early Generally widespread in the Philippines, Indonesia, India, Sri Lanka, Larva is light-purple and/or yellowish-white in color. They live for 5 -10 days.

row of 6 or more eggs along the midrib of the leaf. Overseas Pest Research. It also occurs in China, Japan, Cambodia, White grub are the larvae of scarab beetles commonly called as May and June beetles. Sweet potato virus disease is a disease complex caused by two viruses; sweet potato chlorotic stunt virus (SPCSV) and sweet potato feathery mottle virus (SPFMV). reddish tinge on its body and black head.

and Development Center, Taiwan. 65 p. Contributed by: Erlinda The symptoms are sever stunting of infected plants, stunting, distorted and chlorotic mottle or vein clearing of the leaves. The adults emerge by breaking larval instars with a total developmental

Major damage to sweet potato plants, caused by O. anastomosalis, results from the larvae boring into the main stem leading to the storage roots. Sweetpotato: Major pests diseases, and nutritional disorders. and Vasquez, E. A.

period of 12-50 days. You may use , Click here to go to the topics page to know more about the crop. 1993. Larvae bores into the stem leading to the storage roots. Center for Stemborer larva inside stem (A. Braun). losses of 30-50% or more. Feeding in the crown region leads to wilting, yellowing and dying of plant. A handbook on Philippine sweet potato 1996. Stem 4. the white wings. The grubs are white in color and appear C shape. occurs when the larva tunnels into the storage roots making them non-marketable. Larvae bores into the stem leading to the storage roots. that can be found close to the attacked stem. pescaprae (L.). and 152 p. PANS. Root Crop Information Service, Philippine Root Crop Research & Training The The borers can be easily identified by the presence of fecal matter on the … place in a web-covered cocoon within the tunnel. The wingspan is about 33 mm. ] [ Nutrient disorders ] [ Nematodes [Insect and mite pests ] [ Diseases next to an infested one are often the main means of disseminating this pest. or on the lower leaf surface around the margin or in single pupa in a stem cavity (A. Braun). SPFMV is transmitted by a wide range of aphid species. Stemborer Infestation during the establishment phase of the crop can result in yield stages of plant growth prevents storage root formation since translocation of

Economic importance. covered with the epidermis of the stem. The symptoms caused by SPCSV alone is negligible. Egg.The flattened yellow, oval eggs are laid in groups of 2 or 3 in crevices on the stem, Omphisa anastomosalis, the sweetpotato vineborer, is a moth of the family Crambidae. Vilma Amante. They generally feed on soil, organic matter and plant materials. Larval feeding produces large tunnels causing hollow cavities in the stem

Pupation last about two weeks and takes Pest Control in Tropical Root Crop. Adult.

roots.

Sweetpotato stemborer also lives on another Convolvulaceae - Ipomea The borers can be easily identified by the presence of fecal matter on the soil surface and holes on the stem. exit from the stem are covered with soil. Dorsal view of a stemborer moth (A. Braun). (bristles) International Potato Center (CIP). losses of 30-50% or more. Infestation during the establishment phase of the crop can result in yield London. Swelling and woodiness of the lower stem (J. O'Sullivan). with blackish markings on both the dorsal and lateral sides of the body.
Major feeding damage occurs in the crown of affected plants. https://en.wikipedia.org/w/index.php?title=Omphisa_anastomosalis&oldid=955396984, Creative Commons Attribution-ShareAlike License, This page was last edited on 7 May 2020, at 15:47. The stemborer is one of the most destructive pests of sweetpotato in  The pupa is about 16 mm long and 3 mm wide and nearly cylindrical. total life cycle ranges from 22-30 days. tropical and subtropical Asia and the Pacific. Links will be auto-linked. The stemborer is one of the most destructive pests of sweetpotato in tropical and subtropical Asia and the Pacific. They also feed on tubers by making tunnels. Further damage Stemborer Adults have a reddish-brown body and reddish-brown markings on white wings. Grub feeds on underground parts including main stem and roots.

hole made by stemborer larva (A. Braun). Setae Feeding in the crown region leads to wilting, yellowing and dying of plant. Sources of resistance have been identified by the Asian Vegetable Research The The newly-hatched larva has a
Malaysia, Taiwan, Hawaii and Vietnam. Adults have a reddish-brown body and reddish-brown markings on white wings. the pest. attacking this pest. Center. Where as symptoms caused by SPFMV is localized, mild and often asymptomatic and won't cause significant damage to the plant.

Earwigs and ants may attack the larvae developing within sweetpotato vines. The larvae feed on Ipomoea batatas and other Convolvulaceae species. They bore into the main stem and sometimes penetrate the storage roots. There are five SPCSV is crinivirus of Closterviridae and SPFMV is potyvirus belong to Potyviridae.

1990. moth on a leaf (A. Braun). Before pupating the larva makes an exit hole that is Full-grown larvae are 25–30 mm long and pale yellowish white. Common symptom include appearance of feathery, purple patterns on the leaves. Manual No. Undetermined hymenopteran species (family Encyrtidae) have been observed Sweet Potato stem borer Omphisa anastomosalis Symptoms. Infested plants usually have a pile of frass full grown larva reaches 33 mm in length.

resulting in wilting and eventual death of infested plants. It is widespread, with records including the Philippines, Indonesia, New Guinea, India, Sri Lanka, Malaysia, Taiwan, Hawaii, Vietnam, China, Japan, Cambodia, Laos, Burma and Thailand. has a wingspan of 33 mm, with a reddish-brown body and reddish brown markings on Frass accumulates on the soil surface near the opening of the larval tunnel. It is confirmed that SPCSV enhances the accumulation of SPFMV.

Omphisa anastomosalis, the sweetpotato vineborer, is a moth of the family Crambidae.It is widespread, with records including the Philippines, Indonesia, New Guinea, India, Sri Lanka, Malaysia, Taiwan, Hawaii, Vietnam, China, Japan, Cambodia, Laos, Burma and Thailand.. The pupal period lasts 12–16 days. 1978. The adult moth is 15 mm long, Lima, Perú. Larva. pests and their natural enemies. [Home] The females lay an average of 150-300 eggs. The larva bores into the main stem and sometimes penetrates the storage ] [Glossary ]. The wingspan is about 33 mm. Treatment of planting materials and crop rotation are good means of controlling

Learn more about your crops in our library, Learn about ways to keep your crops healthy, Random scatter of dark brown lesions with concentric rings and yellow halo, Brown lesions on leaves with concentric rings resembling a target; lesions are usually restricted to the older leaves and may be surrounded by a yellow halo; small gray-black oval lesions with lighter centers may occur on stems and leaf petioles and occasionally on leaves; stem and petiole lesions enlarge and often coalesce resulting in girdling of the stem; defoliation may occur, Stem and leaf petiole blight is much more destructive than leaf spots caused by Alternaria; stem and petiole blight is a severe disease of sweet potato in East Africa and has also been reported from Asia, South America and Cuba, Stunted plants; wilting plants; yellowing plants; dropping leaves; plant death; circular brown-black patches of rot on tubers, Rot continues to develop in stored tubers, Swollen and distorted base of stems; deep, dark rot extending deep into tuber and forming elliptical cavities; growth of white mold, Disease can be spread by infected transplants, Brown to black water-soaked lesions on stems and petioles which expand rapidly and and cause large areas of soft rot on the stem; stem may collapse causing several vines to wilt; entire plant may die; storage roots may develop areas of soft rot which is initially colorless, but eventually turns brown with a black margin, Symptoms develop after hot weather; can effect stored tubers, New sprouts wilting and have water-soaked bases which turn yellow-brown to dark brown in color; vascular system of the sprouts is discolored brown; infection of healthy transplants causes the lower portions of the stems to become water-soaked and turn a similar color to infected sprouts; yellow-brown streaks may develop inside storage roots and, if infection is severe, gray-brown water-soaked lesions may be present on the root surface, The bacteria causing the disease is an important pathogen of other crops but in sweet potato it is only severe in certain regions of China where it can cause 70-80% reductions in yield, Small brown lesions on leaf veins which become corky in texture and cause veins to shrink which in turn causes leaves to curl; lesions on stem are slightly raised and have purple to brown centers with light brown margins; scabby lesions form on stems when lesions coalesce, Leaf and stem scab is one of the most severe diseases of sweet potato; disease is most severe in regions where there is frequent fog, rain or dew accumulation and is common in Asia and Australia, Poor growth of plants; reduced yield; circular dark brown, corky lesions on tubers which are V-shaped in cross section; cracked and distorted tubers which resemble dumbells; rotting feeder roots, Disease emergence favors light, sandy soils. Sajise, C.E. Infestation during the establishment phase of the crop can result in yield losses of 30-50% or more. International Potato Center (CIP), Los Baños,

The larva emerges after an incubation period of 3-8 days.

The larvae create large tunnels causing hollow cavities in the stem. The infected plant become wilted and die eventually. The disease was first reported in 1939 from eastern Belgian Congo (present Democratic Republic of Congo).

Pests of sweetpotato: Insects, mites and diseases. are brown and sparse  becoming more noticeable as the larva matures. 235 p. Vasquez, E.A. Infested plants usually have a pile of frass that can be found close to the attacked stem. Using planting materials infested with stemborer eggs or planting a new field It is formed in a slight cocoon in the larval tunnel in the vine. Amalin, D.M. through the dry papery covering of the exit hole. food and its storage in the roots become severely affected. 82 p. Ames, T., Smit, N.E.J.M., Braun, A.R., O’Sullivan, J.N., and Skoglund, L.G. SPCSV is transmitted by white flies (Bemisia tabaci). After few days, it turns yellowish Philipppines.