Challenges for integrated pest management of Dasineura brassicae in oilseed rape

Hausmann, Johannes

doi:10.1007/s11829-021-09861-1

Cited by 6 publications

(3 citation statements)

References 54 publications

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“…Other cecidomyiid pests of canola vary in their use of canola (oilseed rape) tissues. The brassica pod midge, Dasineura brassicae (Diptera: Cecidomyiidae), makes use of only the pods for oviposition (reviewed in Hausmann, 2021). Whereas, the swede midge, Contarinia nasturtii (Diptera: Cecidomyiidae) can use meristematic tissue throughout the plant, including buds, flowers and leaves, as oviposition substrates (Barnes, 1946; Mamaev, 1975).…”

Section: Discussionmentioning

confidence: 99%

Distribution and life history of Contarinia brassicola (Diptera: Cecidomyiidae) in canola (Brassica napus) grown on the Canadian Prairies

Vankosky

Hladun

Soroka

et al. 2022

Agri and Forest Entomology

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Contarinia brassicola Sinclair (Diptera: Cecidomyiidae) is a recently described species found infesting canola (Brassica napus L. and Brassica rapa L., Brassicaceae) in western Canada. There is concern that C. brassicola could have economic impacts on canola production. To learn about its biology, distribution, natural enemies, and potential impact, we conducted a prairie-wide survey in western Canada and field studies using emergence cages and plant dissections between 2017 and 2019. Results of a transect-based survey conducted in Alberta, Saskatchewan, and Manitoba indicated that C. brassicola is widely distributed in western Canada. Two species of parasitic wasp were reared from C. brassicola larvae collected during the survey. We found that C. brassicola can have multiple generations per year, with the first peak of adult emergence occurring in early July with the onset of the susceptible crop stage. Adult midge and larvae may be found from June until early autumn. Midge larvae appear capable of extended diapause over multiple years. During this study, we found that C. brassicola damage was restricted to developing flowers. In the vast majority of fields surveyed, C. brassicola occurred in low population densities and was unlikely to impact yield in those fields.

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Section: Discussionmentioning

confidence: 99%

Distribution and life history of Contarinia brassicola (Diptera: Cecidomyiidae) in canola (Brassica napus) grown on the Canadian Prairies

Vankosky

Hladun

Soroka

et al. 2022

Agri and Forest Entomology

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“…The simultaneous occurrence of both insect species can result in significant yield losses up to 30% (Hoffmann and Schmutterer 1999), which demands the application of insecticides during flowering period, according to good agricultural practice. Since the direct control of D. brassicae is challenging (Hausmann 2021), the CSW population is monitored and controlled instead. The damage threshold for CSW in Germany is one weevil per main raceme at the flowering stage.…”

Section: Introductionmentioning

confidence: 99%

The potential for reducing non-target effects on parasitoids of Ceutorhynchus obstrictus Marsham (Coleoptera: Curculionidae) through spatially targeted insecticide applications

Hausmann

Brandes

2022

J Plant Dis Prot

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Insecticide applications against the cabbage seedpod weevil, Ceutorhynchus obstrictus Marsham (Coleoptera: Curculionidae), in oilseed rape are conducted during the flowering of the crop. During the flowering period, many parasitoids of pest species are abundant in the crop, and therefore, the preservation of natural pest regulation mechanism is especially important. Parasitism often has a substantial mortality factor in pest populations and as far as possible, parasitoids need to be protected from harmful non-target effects of insecticides. In the present study, the effects of three different insecticidal products on the parasitism of cabbage seedpod weevil larvae were investigated. Additionally, the effects of a spatial targeting of insecticides, using conventional and dropleg application technique, were compared. This was done in field trials within a completely randomized block design and four replications at one trial site in 2019 and two sites in 2020. The parasitoid species Trichomalus perfectus Walker and Mesopolobus morys Walker (both Hymenoptera: Pteromalidae) were abundant in almost equal shares in 2019, whereas M. morys was the most important species in 2020. Only in 2019 were harmful effects of the insecticide Biscaya (a.i. thiacloprid) on parasitism rates of C. obstrictus larvae observed. Clear benefits, due to spatial targeting of insecticides using the dropleg technique on parasitoids, were not found. The harmfulness of insecticides is probably affected by properties of different insecticidal products and the temporal coincidence of parasitoid occurrence and insecticide application.

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“…При цьому, личинки пошкоджують не лише стінки стручка, а й недостигле насіння, внаслідок чого він передчасно жовкне, деформується і розтріскується (рис. 3) [9,27].…”

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Harmfulness of cryptid and cabbage pod mosquito of the Steppe zone of Ukraine

Bashchenko¹,

Shyta²,

Bondar³

et al. 2023

PSJ

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Goal. To specify the species composition of phytophages and to investigate their harmfulness in winter rapeseed crops. Methods. The research was conducted in the Steppe zone in 2022 (Odesa region, Odesa district, Khlybodarske settlement, «Odesa State Agricultural Research Station of the Institute of Water Problems and Land Reclamation of the National Academy of Sciences»). Clarification of the species composition and the dynamics of the number of phytophages was carried out according to generally accepted methods. Results. During the surveys, insects belonging to 6 orders (Coleoptera, Heteroptera, Hemiptera, Diptera, Hymenoptera and Lepidoptera) were found, of which 47,3% were direct pests of winter rape, 10.8% were pests of grain crops (there were fields nearby, and research plots of grain and ear crops), and 41.9% are entomophages. At the time of research, there were an average of 46 rapeseed plants per 1 m2, with 36.7 ± 2.19 pods per plant. During visual inspections before harvesting, characteristic damage by the cabbage stem borer (Ceutorhynchus quadridens Panz.) was noted on the rape stalks — 31.0% of plants/ m2, and the plants were broken near the root neck. During the growth of the stem, the larval stages of this pest were found, which penetrated into the middle, biting the petiole of the leaf, then moved to the root neck, where they fed on the tissues of the plant for a long time, causing its fragility. It was found that damage to pods per 1 m2 was 21.9%. Of them, the seed gnat (Ceutorhynchus assimilis Payak.) — 18.0%, the cabbage pod mosquito (Dasyneura brassicae Winn.) — 3.9%. Total crop losses from the above-mentioned pests on winter rapeseed crops amounted to — 52.9%. Conclusions. It was established that the share of pests in the entomocomplex of rape agrocenosis was — 47.3%. Damage to winter rapeseed crops by cabbage seed borer was — 18.0%, cabbage pod mosquito — 3.9%, and cabbage stem borer — 31.0%, which in total resulted in 52.9% yield loss.

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Challenges for integrated pest management of Dasineura brassicae in oilseed rape

Cited by 6 publications

References 54 publications

Distribution and life history of Contarinia brassicola (Diptera: Cecidomyiidae) in canola (Brassica napus) grown on the Canadian Prairies

Distribution and life history of Contarinia brassicola (Diptera: Cecidomyiidae) in canola (Brassica napus) grown on the Canadian Prairies

The potential for reducing non-target effects on parasitoids of Ceutorhynchus obstrictus Marsham (Coleoptera: Curculionidae) through spatially targeted insecticide applications

Harmfulness of cryptid and cabbage pod mosquito of the Steppe zone of Ukraine

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