Occurrence of Lepidopteran Insect Pests and Injury Aspects in Adzuki Bean Fields

Abstract

:Three lepidopteran insect pests of the legume pod borer, Maruca vitrata (Lepidoptera: Pyralidae), the soybean pod worm, Matsumuraeses phaseoli (Lepidoptera: Tortricidae) and an Ostrinia spp. (Lepidoptera: Pyralidae) attacking adzuki bean, Vigna angularis, were confirmed as the major insect pests during the reproductive developmental stage of adzuki bean, and M. vitrata existed dominantly. Almost all plants in the adzuki bean field were injured by at least one of the three species, and 15~60% of reproductive organs were injured. Unbloomed inflorescence occurred continuously through the reproductive stage of adzuki bean. While the flower was many at the early stage and its number soon decreased, the pod was few at the early stage, but its number increased soon and maintained at a constant level. The results suggested that the adzuki bean injured by insect pests compensate the flower loss by developing new inflorescence, but the compensation do not cause the development of new pods. While M. vitrata and M. phaseoli were observed in flowers, pods and stem mainly during the first half of reproductive stage of adzuki bean, Ostrinia spp. was observed only in pods and stem during the second half. In addition, while all instars of larvae of M. vitrata were observed, larvae between the third and fifth instars for M. pahseoli and Ostrinia spp. were observed. KEY WORDS

Alteration of insulin signaling to control insect pest by using transformed bacteria expressing dsRNA

“…Larvae of M. vitrata were reared on an artificial diet under controlled laboratory conditions (25 ± 1 °C, 16:8 h of L:D photoperiod, and 60 ± 10% relative humidity). Larval instars (L1–L5) were determined by head size .…”

“…The legume pod borer, Maruca vitrata (Lepidoptera: Crambidae), infests leaves, flowers, and pods of leguminous crops in subtropical and tropical regions . With climate change, this species has migrated to northern temperate regions, including Korea . The northern migration and establishment may be explained by its high supercooling capacity along with trehalose synthesis, which is responsible for cold‐hardiness .…”

“…20 With climate change, this species has migrated to northern temperate regions, including Korea. 21 The northern migration and establishment may be explained by its high supercooling capacity along with trehalose synthesis, which is responsible for cold-hardiness. 22 Trehalose is a main hemolymph sugar of M. vitrata.…”

Insulin‐like peptides of the legume pod borer, Maruca vitrata, and their mediation effects on hemolymph trehalose level, larval development, and adult reproduction

“…Larvae of M. vitrata used in this study were originated from an adzuki bean field in Suwon (Korea) in 2004. This field population was maintained by rearing larvae with an artificial diet (Jung, Seo, Cho, Kwon, & Kim, ) at constant temperature of 25 ± 1°C with 16:8 hr (L:D) photoperiod and 60 ± 10% relative humidity. Its larvae undergo five instars (L1–L5).…”

A Molecular Marker Discriminating the Soybean Podworm, Matsumuraeses phaseoli and the Podborer, M. falcana (Lepidoptera: Tortricidae)

“…팥나방은 국내에서 팥의 주요 해충 중의 하나로 꽃과 꼬투리에 심한 피해를 야기하고 있어 (Jung et al, 2009), 발생생태를 연구하기 위해 예찰수단으로서 성충 의 성페로몬 연구가 진행중이다. 어리팥나방은 2005년 이전까지 국내에서 기록되어 있지 않았는데, 동종에 대 해 보고된 성페로몬 조성 (Wakamura, 1985;Wakamura and Kegasawa.…”