Host Specificity of the Egg-Larval Parasitoid, Ascogaster reticulatus WATANABE (Hymenoptera : Braconidae) among Five Tortricid and One Noctuid Species

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概要

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• Ascogaster reticulatus WATANABE (Braconidae) is an egg-larval parasitoid of certain tortricids, e.g., Adoxophyes sp. (Ad) and Adoxophyes orana fasciata WALSINGHAM (Ao). In this study, the host preference by A. reticulatus was tested among two habitual hosts, Ad and Ao, and three unusual host species, Pandemis heparana DENIS et SCHIFFERMULLER (Ph), Homonamagnanima DIAKONOFF (Hm), and Hoshinoa longicellana WALSINGHAM (Hl). The tow-choice tests showed that the order of oviposition preference among the five tortricids was Ad=Ao>Hm>Hl>Ph. Female parasitoids deposited eggs in all of the tortricid egg masses. Among parasitized egg masses of the unusual host species (Ph, Hm and Hl) artificially reared, parasitoid larvae egressed only from Ph larvae, made cocoons and then emerged. Parasitoid eggs hatched in Hm and Hl eggs and became 1st-instar larvae, then grew after the host eggs hatched. However, the parasitoid 1st-instar larvae were encapsulated by the hemocytes of these host larvae of later instars. The Hm egg mass coated with the Ad egg mass extract containing the kairomone increased oviposition time and percent parasitism by A. reticulatus. To the noctuid moth, Leucania separata (WALKER) (Ls), the parasitoid showed no response to the egg mass, but coating of the kairomone on the egg mass stimulated oviposition. The parasitoid eggs hatched in Ls eggs, but the 1st-instar larvae were soon encapsulated with melanin on their surface.

• 日本応用動物昆虫学会の論文
• 1986-02-25

著者

• Kainoh Yooichi

  Laboratory Of Applied Entomolog.y Tokyo University Of Agriculture And Technology

• Kainoh Yooichi

  Laboratory Of Applied Entomology Tokyo University Of Agriculture And Technology:institute Of Agricul

• Kawakami Toshitake

  Laboratory Of Applied Entomology Tokyo University Of Agriculture And Technology:(present Address)mit

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• Kairomone of the Egg-Larval Parasitoid, Ascogaster reticulatus WATANABE (Hymenoptera : Braconidae)
• Searching Behavior and Oviposition of the Egg-Larval Parasitoid, Ascogaster reticulatus WATANABE (Hymenoptera : Braconidae)
• Associative learning and discrimination of 10 plant species by the egg-larval parasitoid, Ascogaster reticulata Watanabe (Hymenoptera: Braconidae)
• Host-Finding Behavior of the Rice Bug, Leptocorisa chinensis DALLAS (Hemiptera : Coreidae), with Special Reference to Diel Patterns of Aggregation and Feeding on Rice Plant
• Development of the Immature Stages of Ascogaster reticulatus WATANABE (Hymenoptera : Braconidae), an Egg-Larval : Parasitoid of the Smaller Tea Tortrix Moth, Adoxophyes sp.(Lepidoptera : Tortricidae)
• Host Specificity of the Egg-Larval Parasitoid, Ascogaster reticulatus WATANABE (Hymenoptera : Braconidae) among Five Tortricid and One Noctuid Species

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