Key Pests and Parasitoids of Oilseed Rape or Canola in North America and the Importance of Parasitoids in Integrated Management

“…Root maggots overwinter as puparia beneath the soil surface and adults emerge in spring to mate and seek new host plants for oviposition (Dosdall and Mason 2010). When canola is grown continuously at a site, rather than rotated with a nonhost crop, newly emerged adults need not disperse in spring to locate sites for oviposition.…”

mentioning

confidence: 99%

“…(Dosdall and Mason 2010). Larval root maggots hatch from eggs laid in the soil near the basal region of canola plants and inßict damage as they feed on tissues of the root phloem, periderm, and xylem parenchyma (McDonald and Sears 1992).…”

mentioning

confidence: 99%

Crop Sequence Effects on Root Maggot (Diptera: Anthomyiidae: <I>Delia</I> spp.) Infestations in Canola

Dosdall¹,

Harker

O’Donovan

et al. 2012

jnl. econ. entom.

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Strong market demand for canola, Brassica napus L., has prompted some western Canadian producers to increase the frequency of this crop in rotations with other crop species, but the impact of this practice on canola insect pests has not been determined. Here, we investigate 12 cropping sequences involving canola over a 3-yr period (2008-2010 inclusive) at five locations across western Canada. Cropping sequences varied from continuous production of two herbicide-tolerant canola varieties, to production in two of 3 yr, to canola production in one of the 3 yr. Treatments analyzed were the frequency and timing of canola within the rotational sequence. Damage by larvae of root maggots (Diptera: Anthomyiidae: Delia spp.) to canola taproots increased as the study progressed, particularly in 2010 after canola had been grown continuously for 3 yr. Yield declined with continuous canola production, and differences were greatest in 2010. At mean canola crop prices for 2010, the yield reduction from continuous production amounted to economic losses of approximately Can$282-$377/ha. Crop quality, in terms of oil and protein concentrations of harvested seed, was affected more by crop variety than cropping sequence. Crop sequence effects for root maggot damage, yield, and seed quality were relatively stable in the presence of environmental (location) variation. Results of our study suggest that continuous canola production could be unsustainable over the long-term even though market forces currently provide incentive for this practice.

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“…C. assimilis , C. napi , C. pallidactylus and C. picitarsis ), the pollen beetle ( Meligethes aeneus syn. Brassicogethes aeneus ), flies and midges ( Delia radicum and Dasineura brassicae ), moths ( Plutella xylostella and Mamestra configurata ) and aphids ( Brevicoryne brassicae and Myzus persicae ) (reviewed by Williams () for European pests of winter OSR, Ekbom () for European pests of spring OSR and Dosdall and Mason () for North American pests of canola).…”

Section: Introductionmentioning

confidence: 99%

Breeding for insect resistance in oilseed rape: Challenges, current knowledge and perspectives

Hervé

2017

Plant Breeding

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Dealing with insect pests is one of the biggest challenges facing the cultivation of oilseed rape (Brassica napus, OSR). Insect pests are usually controlled using insecticides, but the increasing occurrence of insecticide-resistant populations and the socio-economic context argue against the sole use of these substances. Plant resistance is a classical and proven alternative crop protection strategy that is the basic tool of integrated pest management. However, no insect-resistant OSR cultivar is currently available on the market. Here, I review some of the constraints that make phenotyping for insect resistance particularly challenging with OSR and give perspectives to develop this resistance. Some studies have proved that breeding OSR for insect resistance could be achieved, and three strategies have been considered: introducing resistance transgenes into the OSR genome, exploiting natural variation in resistance already present in B. napus and introgressing resistance from other brassicaceous species. The white mustard, Sinapis alba, seems a particularly promising source of resistance against most of the OSR insect pests.

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Key Pests and Parasitoids of Oilseed Rape or Canola in North America and the Importance of Parasitoids in Integrated Management

Cited by 30 publications

References 164 publications

Effects of land use on infestation and parasitism rates of cabbage seed weevil in oilseed rape

Effects of land use on infestation and parasitism rates of cabbage seed weevil in oilseed rape

Crop Sequence Effects on Root Maggot (Diptera: Anthomyiidae: <I>Delia</I> spp.) Infestations in Canola

Breeding for insect resistance in oilseed rape: Challenges, current knowledge and perspectives

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