Interactions between the winter cherry bug Acanthocoris sordidus (Hemiptera: Coreidae) and its egg parasitic wasps

Abstract

Detailed research on the relative strength of the influence of parasitoids on hosts has contributed to the development of biological control techniques. Gryon philippinense (Ashmead) is a major egg parasitoid of the winter cherry bug, Acanthocoris sordidus (Thunberg). However, available data are insufficient to determine which egg parasitoids have the strongest effect on mortality of A. sordidus or why G. philippinense is the major egg parasitoid of A. sordidus. In this study, G. philippinense attained a much higher level of parasitism on A. sordidus eggs compared to four other parasitoid species. Mortality induced by G. philippinense on A. sordidus egg clusters occurred in an all-or-none manner, whereas mortality caused by the four other parasitoids occurred in a random manner. Compared to Ooencyrtus spp., G. philippinense required a significantly shorter time to parasitize an A. sordidus egg and also parasitized significantly more A. sordidus eggs within 24 h. These findings demonstrate that a short handling time allows G. philippinense to be the most significant egg parasitoid of A. sordidus.

Reprodução de Tetrastichus howardi em pupas de Diatraea saccharalis de diferentes idades

“…O sucesso de programas de controle biológico de insetospragas depende da disponibilidade de técnicas de criação em larga escala de parasitoides e seus hospedeiros, bem como do conhecimento de suas interações biológicas (PEREIRA et al, 2010 a, b;PASTORI et al, 2010;NAKAJIMA;NAKAGAWA;FUJISAKI, 2012). Diatraea saccharalis pode ser criada em grandes quantidades e sua pupa é adequada para o desenvolvimento de T. howardi, o que demonstra o potencial desse hospedeiro para ser utilizado em criações massivas do parasitoide (CRUZ et al, 2011).…”

Comparison of relative growth patterns of nymphal legs in relation to the oviposition habits of three heteropteran species

“…Females of A. sordidus lay eggs both on and off their host plants Nakajima et al 2011). When they oviposit off their host plants, the second-instar nymphs must search for their host plants to survive, because the second instar is the first feeding stage.…”

“…Nakajima et al (2011) found that egg clusters of A. sordidus were laid with roughly equal frequency on both host and non-host plants in Kyoto (35°00 0 N, 135°46 0 E) and Kochi prefectures (33°33 0 N, 133°40 0 E) in Japan; most of them were laid away from host plants on Amami Island, Kagoshima Prefecture, Japan (28°24 0 N, 129°35 0 E). We revealed that oviposition on nonhost plants by A. sordidus decreased egg mortality by providing their eggs with a refuge from ground-living arthropod predators, but increased nymphal mortality by imposing host-searching costs on their nymphs .…”

“…The winter cherry bug, Acanthocoris sordidus (Thunberg) (Heteroptera: Coreidae), which sucks phloem sap from plant species of the families Solanaceae and Convolvulaceae (Fujisaki 1980;Tomokuni 1993), often deposits egg clusters on non-host plants , fallen leaves (Nakajima et al 2011), and even abiotic substrates (Y. Nakajima, personal observation) near its host plants. Nakajima et al (2011) found that egg clusters of A. sordidus were laid with roughly equal frequency on both host and non-host plants in Kyoto (35°00 0 N, 135°46 0 E) and Kochi prefectures (33°33 0 N, 133°40 0 E) in Japan; most of them were laid away from host plants on Amami Island, Kagoshima Prefecture, Japan (28°24 0 N, 129°35 0 E).…”

Identification and laboratory behavioral test of the alarm pheromone of Acanthocoris sordidus Thunberg (Hemiptera: Coreidae)

“…The winter cherry bug, Acanthocoris sordidus Thunberg (Hemiptera: Coreidae), is widely spread in Korea, Japan, and Taiwan (Nakajima et al 2011), feeding on the plant species of Convolvulaceae and Solanaceae (Fujisaki 1980(Fujisaki , 1981. It may pose a serious threat to vegetable crops in greenhouses where the use of pollinators and natural enemies requires minimal use of chemical pesticides (Dasilao & Arakawa 2004).…”