Leguminivora glycinivorella

Type

Exotic

Taxonomy

Leguminivora glycinivorella (Matsumura) (Tortricidae: Olethreutinae: Grapholitini)

Common name: soybean pod borer

Synonyms: anticipans (Laspeyresia), parastrepta (Laspeyresia), zygogramma (Laspeyresia)

Adult Recognition

FWL: 4.5-6.5 mm

Palpi relatively short, slightly upcurved. Head and thorax brown. Forewing brown and lightly dusted with pale coppery scales, becoming slightly lighter in overall color distally; ocellusocellus:
forewing pattern element - an ovoid region anterior to the tornus; adult head - a simple insect "eye" located dorsal to the compound eye
present as three short black lines; eight pairs of short strigulae present along the costacosta:
the anterior margin of each wing
, becoming more well-defined towards the apexapex:
the point furthest removed from the base or at the end of the costal area
; chalky gray-blue faintly present between strigulae and directed towards inner margininner margin:
see dorsum
; fringe pale copper. Hindwing dark brown; hindwing fringe is white with a row of short dark brown scales at the base. Male with costal fold absent.

Male genitalia can be distinguished by the presence of paired scent organs filled with short black scales on the eighth abdominal sternite, which is characteristic of the genus (Horak 2006Horak 2006:
Horak, M. 2006. Olethreutine moths of Australia (Lepidoptera: Tortricidae). Monographs on Australian Lepidoptera, Vol. 10. 522 pp.
). Female genitalia are characterized by a narrow ostiumostium:
see ostium bursae
, small sterigmasterigma:
the sclerotized region surrounding the female ostium bursae
, and paired, opposite-facing thorn-like signasigna:
plural of "signum"
.

Larval Morphology

Early instar larvae are orange-yellow, getting progressively whiter or greenish by the third instar, and orange to pink in the final instar. The prothoracic shieldprothoracic shield:
a sclerotized plate on the dorsal surface of the prothorax
is brown and the head is black.

Similar Species

Several genera of Grapholitini, such as AspilaCydia and Grapholita have species that closely resemble L. glycinivorella. Dissection may be necessary to distinguish them.

Biology

The following account is summarized from Kobayashi (1972), Kobayashi (1976)Kobayashi (1976):
Kobayashi, T., 1976. Pod borers and the seed pest complex in Asian soybeans. In: Expanding the use of soybean. Proceedings of a conference for Asia and Oceania, Chiang Mai, Thailand, February 1976, [ed. by Goodman, R.M.]. Illinois, USA: University of Illinois at Urbana-Champaign. 171-173.
and Kobayashi & Oku (1980).

One to two generations occur per year in Asia, depending on climate. In Japan, adults emerge in early to mid-August and a second generation (if present) occurs in late September. Eggs hatch 7-9 days later and bore into the pods and eat the seeds (much in the same way as another grapholitine pest of Fabaceae treated on this site, Cydia nigricana). After finished feeding, larvae emerge from the pods to overwinter as mature larvae in the soil.

Larval hosts include representatives from the Leguminosae (Fabaceae), the most economically important of which is soybean (Glycine max). A few host records from other plant families exist, but these may represent accidental feeding records or misidentifications.

Host plant Host plant family Reference(s)
Mangifera indica Anacardiaceae Obraztsov 1967Obraztsov 1967:
Obraztsov, N. S. 1967. Die Gattungen der Palaearktischen Tortricidae. 2. Die Unterfamilie Olethreutinae. 7. Teil, Tribus Eucosmini (Heinr. 1923) - Fortsetzung. Tijdschr. Entomol. 110: 65-88.
Glycine max Fabaceae Park 1983bPark 1983b:
Park, K. T. 1983b. Microlepidoptera of Korea. Insecta Koreana. 3: 8-24.
; Byun et al.1998; Serebrennikova et al. 1986Serebrennikova et al. 1986:
Serebrennikova, N. I., Kulikova, L. S., Zhukovskaya, S. A. 1986. [Pests of soya] Zashchita Rast. 1986: 52-56 [In Russian].
; Kuznetzov 1994
Lablab purpureus Fabaceae Park 1983bPark 1983b:
Park, K. T. 1983b. Microlepidoptera of Korea. Insecta Koreana. 3: 8-24.
; Byun et al. 1998Byun et al. 1998:
Byun, B., Bae, Y., Park, K. 1998. Illustrated catalogue of Tortricidae of Korea (Lepidoptera). In : Park, K.-T. (ed.), Insects of Korea [2]. Korea Research Institute of Bioscience and Biotechnology amp; Center for Insect Systematics. 317 pp.
Lespedeza sp. Fabaceae Kuznetzov 1994
Sophora flavescens Fabaceae Zhang 1994Zhang 1994:
Zhang, B.-C., 1994. Index of economically important Lepidoptera. CAB International, Oxon, U.K. 599 pp.
Vigna unguiculata Fabaceae Park 1983bPark 1983b:
Park, K. T. 1983b. Microlepidoptera of Korea. Insecta Koreana. 3: 8-24.
; Byun et al. 1998Byun et al. 1998:
Byun, B., Bae, Y., Park, K. 1998. Illustrated catalogue of Tortricidae of Korea (Lepidoptera). In : Park, K.-T. (ed.), Insects of Korea [2]. Korea Research Institute of Bioscience and Biotechnology amp; Center for Insect Systematics. 317 pp.
Maranta arundinaceae Marantaceae Zhang 1994Zhang 1994:
Zhang, B.-C., 1994. Index of economically important Lepidoptera. CAB International, Oxon, U.K. 599 pp.

Host plant table (embedded)

View full screen host table here

Distribution

Leguminivora glycinivorella is native to east Asia, including Siberia, northern China, Korea, and Japan.

 Adult. © John W. Brown. Image used with permission
Adult. © John W. Brown. Image used with permission