Omiodes indicata (soyabean webworm)
Identity
- Preferred Scientific Name
- Omiodes indicata (Fabricius)
- Preferred Common Name
- soyabean webworm
- Other Scientific Names
- Asopia vulganlis Guenée, 1854
- Botis fortificalis Möschler, 1890
- Botys connexalis Walker, [1866]
- Botys dolosalis Möschler, 1881
- Botys moeliusalis Walker, 1959
- Botys reductalis Walker, [1866]
- Botys sabalis Walker, 1854
- Hedylepta indicata (Fabricius)
- Hedylepta vulgalis
- Lamprosema indicata (Fabricius)
- Nacoleia indicata Dognin, 1909
- Nacoleia vulgalis
- Omiodes vulgalis
- Phryganodes indicata
- International Common Names
- Englishbean leaf stitcherbean leaf-webberleafwormsoybean leaf foldersoybean webworm
- Spanishpega hoja
- EPPO code
- HEDYIN (Hedylepta indicata)
Pictures
Adult
Wingspan 20-28 mm, colour variable, ranging from reddish-yellow over orange-brown to dark-grey with some lighter grey markings. Due to the great variation in wing colour, moths are identified by dissecting the genitalia.
K.V.N. Maes
Omiodes indicata
Larva
Omiodes indicata
Larva on leaf showing damage from feeding and black frass
NBAIR
Omiodes indicata
Larva on leaf showing symptoms of feeding
NBAIR
Omiodes indicata
Merle Shepard, Gerald R.Carner, and P.A.C Ooi, Clemson University, bugwood.org
Refer to Bugwood: http://www.bugwood.org/ImageUsage.html
Omiodes indicata
Merle Shepard, Gerald R.Carner, and P.A.C Ooi, Clemson University, bugwood.org
Refer to Bugwood: http://www.bugwood.org/ImageUsage.html
Omiodes indicata
Merle Shepard, Gerald R.Carner, and P.A.C Ooi, Clemson University, bugwood.org
Refer to Bugwood: http://www.bugwood.org/ImageUsage.html
Omiodes indicata
Mark Dreiling, bugwood.org
Refer to Bugwood: http://www.bugwood.org/ImageUsage.html
Distribution
Host Plants and Other Plants Affected
| Host | Host status | References |
|---|---|---|
| Arachis | Main | |
| Arachis hypogaea (groundnut) | Main | |
| Beta vulgaris var. saccharifera (sugarbeet) | Main | |
| Calopogonium | Main | |
| Chrysanthemum indicum (chrysanthemum) | Main | |
| Coleus | Main | |
| Fabaceae (leguminous plants) | Main | |
| Gloriosa | Main | |
| Glycine max (soyabean) | Main | |
| Lantana camara (lantana) | Main | |
| Mikania scandens | Unknown | Diaz et al. (2015) |
| Nicotiana tabacum (tobacco) | Main | |
| Phaseolus (beans) | Main | |
| Phaseolus vulgaris (common bean) | Main | |
| Vigna unguiculata (cowpea) | Main | |
| Vigna vexillata (wild sweetpea) | Main |
Symptoms
The eggs of O. indicata are laid on the young leaves or shoots of host plants. The green larvae live between two leaves spun together. In later stages, they may spin several leaves together forming a mass of congregated leaves which are partially eaten. They feed on the mesophyll of the leaves but the final-instar larvae may reduce the leaves to a skeleton.
List of Symptoms/Signs
| Symptom or sign | Life stages | Sign or diagnosis |
|---|---|---|
| Plants/Leaves/external feeding | ||
| Plants/Leaves/leaves rolled or folded | ||
| Plants/Leaves/webbing |
Prevention and Control
Biological Control
Parasites of O. indicata in India and China are listed in Thakur and Gangwar (1989) and Xia et al. (1988), respectively, in studies of the biology of this species. These parasitoids have not been evaluated for biological control of O. indicata. The effectiveness of Trichogramma spp. in biological control programmes against Lepidoptera species inclusing O. indicata in the Cauca Valley, Colombia was evaluated by Garcia-Roa (1991).
Host-Plant Resistance
Soyabean cultivars were screened for resistance to leaf-eating insects in India (Shrivastava and Srivastava, 1988) and China (Cui et al., 1995). No resistance was found overall, but some cultivars were less susceptible than others to attacks by O. indicata.Soyabean varieties IAC72-228 and PI227687 were the most resistant to O. indicata in Brazil (Lourencao et al., 1985). In field trials of a further eight lines, PI274453 and PI274454 suffered little damage. Segregation in the F2 from a cross between PI274453 and the susceptible Parana indicated that the resistance of PI274453 was inherited as a simple dominant character could be easily transferred to commercial varieties.
Chemical Control
Chemical control is the method most commonly used to control O. indicata. Several contact and systemic insecticides were evaluated for effectiveness and cost by Thakur (1988). Shrivastava and Srivastava (1988) combined screening for resistance with chemical control of the larvae.
Impact
O. indicata may occasionally become a serious pest on soyabean. It has recently been recorded from different regions in China and India but no quantitative data on the impact of the pest were given. Larvae of O. indicata may occasionally be reported feeding on crops but this is not considered as damage (Kalshoven, 1950).The number of leaf folds per plant is used to measure the damage caused by O. indicata. Gangwar and Thakur (1991) calculated the economic threshold to be 8-9 leaf folds per plant in Meghalaya, India.
Information & Authors
Information
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Copyright
Copyright © CABI. CABI is a registered EU trademark. This article is published under a Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0)
History
Published online: 16 November 2021
Language
English
Authors
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