Inter- and Intrafield Distribution of Cereal Leaf Beetle Species (Coleoptera: Chrysomelidae) in Belgian Winter Wheat

Vijver, Elias Van de; Landschoot, Sofie; Roie, Martijn Van; Temmerman, Femke; Dillen, Jill; Ceuleners, Kevin De; Smagghe, Guy; Baets, Bernard De; Haesaert, Geert

doi:10.1093/ee/nvz002

Cited by 13 publications

(8 citation statements)

References 17 publications

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“…However, a common current host species, O. duftschmidi, was not included in the previous study because until 1989, it was assigned to O. melanopus [32]. However, O. duftschmidi occurs together with other crop beetles in the same grain field agroecosystems [34]. The host specificity of wasps for three common species of crop beetles (O. duftschmidi, O. gallaeciana or O. melanopus) was reviewed in central Europe.…”

Section: Discussionmentioning

confidence: 99%

Host Specificity of the Parasitic Wasp Anaphes flavipes (Hymenoptera: Mymaridae) and a New Defence in Its Hosts (Coleoptera: Chrysomelidae: Oulema spp.)

Samková

Hadrava

Skuhrovec

et al. 2020

Insects

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The parasitic wasp Anaphes flavipes (Förster, 1841) (Hymenoptera: Mymaridae) is an important egg parasitoid of cereal leaf beetles. Some species of cereal leaf beetle co-occur in the same localities, but the host specificity of the wasp to these crop pests has not yet been examined in detail. A lack of knowledge of host specificity can have a negative effect on the use of this wasps in biological control programs addressed to specific pest species or genus. In this study, laboratory experiments were conducted to assess the host specificity of A. flavipes for three species of cereal leaf beetles (Oulema duftschmidi Redtenbacher, 1874, Oulema gallaeciana Heyden, 1879 and Oulema melanopus Linnaeus, 1758) in central Europe. For the first time, a new host defence against egg parasitoids occurring in O. gallaeciana from localities in the Czech Republic, a strong dark sticky layer on the egg surface, was found and described. The host specificity of A. flavipes was studied in the locality with the presence of this defence on O. gallaeciana eggs (the dark sticky layer) (Czech Republic) and in a control locality (Germany), where no such host defence was observed. Contrary to the idea that a host defence mechanism can change the host specificity of parasitoids, the wasps from these two localities did not display any differences in that. Respectively, even though it has been observed that eggs with sticky dark layer can prevent parasitization, the overall rate of parasitization of the three species of cereal beetles has not been affected. However, in our view, new host defence can influence the effects of biological control, as eggs of all Oulema spp. in the locality are protected against parasitization from the wasps stuck on the sticky layer of the host eggs of O. gallaeciana.

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Section: Discussionmentioning

confidence: 99%

Host Specificity of the Parasitic Wasp Anaphes flavipes (Hymenoptera: Mymaridae) and a New Defence in Its Hosts (Coleoptera: Chrysomelidae: Oulema spp.)

Samková

Hadrava

Skuhrovec

et al. 2020

Insects

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“…The cereal leaf beetle (CLB), Oulema melanopus L. (Coleoptera: Chrysomelidae) is native to Europe and Asia, and has become an important pest of cereal crops on a global scale (Philips et al, 2011). The species is a common cereal crops pest in Belgium (Stilmant, 1995;Van de Vijver et al, 2019), Poland (Ulrich et al, 2004), France (Stilmant, 1995), Serbia (Dimitrijevic et al, 1999), Italy (Morlacchi et al, 2007), Germany (Schmitt & Ronn, 2011) and The Netherlands (Daamen & Stol, 1993). In 1962, CLB was first detected in Michigan and caused economic damage to cereal crops (Castro et al, 1965;Haynes & Gage, 1981).…”

Section: Distribution and Range Expansion Of Cereal Leaf Beetle Oulementioning

confidence: 99%

Laboratory and field tests of predation on the cereal leaf beetle, Oulema melanopus (Coleoptera: Chrysomelidae)

Kheirodin

Cárcamo

2019

Biocontrol Science and Technology

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In recent years, the cereal leaf beetle (CLB) Oulema melanopus (Coleoptera: Chrysomelidae), an important pest of wheat, barley, and oat throughout the world, has become a serious pest of cereal crops in Western Canada. Following CLB invasion, Tetrastichus julis (Hymenoptera: Eulophidae), the most efficient larval parasitoid of CLB, was introduced into the Canadian Prairies. I investigated the effect of landscape complexity, ranging from high (seminatural habitats > 50%) to low (semi-natural habitats < 30%) on the abundance of CLB and its parasitism in southern Alberta. Cereal leaf beetle abundance and the parasitism rate of T. julis responded positively to the proportion of CLB major hosts (wheat and barley) in the current and previous years at various spatial scales (0.5 to 2 km). Landscape diversity was negatively associated with CLB abundance. Cereal leaf beetle parasitism increased when there was a higher proportion of canola and alfalfa in the landscape. Cereal leaf beetle parasitism also positively responded to CLB abundance in cereal fields, indicating a density-dependent response. Overall, I concluded that diversification of crops and semi-natural habitats in the surrounding landscape are an important factor to reduce CLB numbers in the Canadian Prairies.Laboratory and field predation trials revealed for the first time the contribution of various predators to CLB control. Several species of Hippodamia (Coleoptera:iii Coccinellidae), carabids (Coleoptera: Carabidae) and nabid bugs (Hemiptera: Nabidae) were among the best predators of CLB immature stages under laboratory conditions, that also included Coccinella septempunctata (Coleoptera: Coccinellidae) and Staphylinidae. I found an average 24.5% of predation on sentinel eggs in wheat fields in 24 h trials. I developed a set of species-specific primers to detect CLB DNA in the gut content of generalist predators, which confirmed that Nabis americoferus and several Hippodamia species are the most promising predators of CLB in wheat. Nabis americoferus was the most abundant predator in the Lethbridge area and had 0.35 proportion positives for CLB DNA. Altogether, the predation studies highlight the importance of predators in CLB control, which has been neglected to date but can have important roles in sustainable pest management programs for CLB in cereal crops.

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“…Large spillover radius of natural enemies is important for their efficient plant damage mitigation because Oulema spp. densities have been shown to increase towards field interiors in a Belgian study (Van De Vijver et al 2019). Our estimation of spillover scale is similar to the observations made by Martin et al (2015), who reported a scale-dependency of landscape effects on the studied parasitoids of aphids, which was the strongest at a scale of 200 m. The results of another study conducted by Evans et al (2015) also coincide with our observations, who found that the parasitization rate of CLB larvae by Tetrastichus julis, a host-specific parasitoid wasp of the CLB, was the strongest at 50-100 m distance from field edge in wheat fields.…”

Section: Discussionmentioning

confidence: 91%

Linear woody landscape elements may help to mitigate leaf surface loss caused by the cereal leaf beetle

et al. 2020

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Context Woody semi-natural habitats serve as permanent habitats and hibernation sites for natural enemies and, through spillover processes, they play an important role in the biological control of insect pests. However, this service is also dependent on the amount and configuration of the dominating woody habitat types: linear landscape elements (hedgerows, shelterbelts), and more evenly extended plantations. Relating natural enemy action to the landscape context can help to identify the effect of woody habitats on biological control effectiveness. Objectives In the Central European agricultural landscapes such as in the Hungarian lowlands, where our study took place, woody linear elements are characterised by high, while woody areal elements, mostly plantations, by low biological and structural diversity. In this study, we aimed to determine which composition and configuration of woody linear and areal habitats in the landscape may enhance the effect of natural enemy action on plant damage caused by the cereal leaf beetle (CLB, Oulema melanopus). Methods Herbivory suppression by natural enemies was assessed from the leaf damage difference between caged and open treatments. These exclusion experiments were carried out in 34 wheat fields on plants with controlled CLB infections. The results were related to landscape structure, quantified by different landscape metrics of both woody linear and areal habitats inside buffers between 150 and 500 m radii, surrounding the wheat fields. Results The exclusion of natural enemies increased the leaf surface loss caused by CLBs in all fields. Shelterbelts and hedgerows in 150–200 m vicinity of the wheat fields had a strong suppressing effect on CLB damage, while the presence of plantations at 250 m and further rather impeded natural enemy action. Conclusions Our results indicate that shelterbelts and hedgerows may provide a strong spillover of natural enemies, thus contribute to an enhanced biological control of CLBs.

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Inter- and Intrafield Distribution of Cereal Leaf Beetle Species (Coleoptera: Chrysomelidae) in Belgian Winter Wheat

Cited by 13 publications

References 17 publications

Host Specificity of the Parasitic Wasp Anaphes flavipes (Hymenoptera: Mymaridae) and a New Defence in Its Hosts (Coleoptera: Chrysomelidae: Oulema spp.)

Host Specificity of the Parasitic Wasp Anaphes flavipes (Hymenoptera: Mymaridae) and a New Defence in Its Hosts (Coleoptera: Chrysomelidae: Oulema spp.)

Laboratory and field tests of predation on the cereal leaf beetle, Oulema melanopus (Coleoptera: Chrysomelidae)

Linear woody landscape elements may help to mitigate leaf surface loss caused by the cereal leaf beetle

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