How Natural Enemies and Cabbage Aphid (<i>Brevicoryne brassicae</i>L.) Population Dynamics Affect Organic Broccoli Harvest

Nieto, Diego J.; Shennan, Carol; Settle, William H.; O’malley, Rachel; Bros, Shannon M.; Honda, Jeffrey Y.

doi:10.1603/0046-225x-35.1.94

Cited by 20 publications

(11 citation statements)

References 15 publications

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“…Pubescence was shown to reduce movement and performance of syrphids in other crops (Verheggen et al 2009). It is perhaps no coincidence that syrphids are major predators of aphids in crops that lack dense pubescence (Chambers and Adams 1986, Nieto et al 2006, Gontijo et al 2012. Thus, although the ecological mechanisms limiting syrphid populations in soybeans remain unclear, the current body of literature suggests that syrphids can be added to the list of predators and parasitoids (e.g., Binodoxys kellogensis, Lysiphlebus testaceipes, and C. maculata), which can complete development on soybean aphids (Mignault et al 2006, Brewer and, but have remained at low density in soybean stands (Schmidt et al 2008).…”

Section: Discussionmentioning

confidence: 99%

Field Abundance and Performance of Hoverflies (Diptera: Syrphidae) on Soybean Aphid

Eckberg

Peterson

Borsh

et al. 2014

Annals of the Entomological Society of America

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Section: Discussionmentioning

confidence: 99%

Field Abundance and Performance of Hoverflies (Diptera: Syrphidae) on Soybean Aphid

Eckberg

Peterson

Borsh

et al. 2014

Annals of the Entomological Society of America

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“…However, the emergence of new pests due to the globalization of markets, climate change, and pest resistance to conventional pesticides has promoted the search for new natural enemies and pest pathogens. Management practices that encourage the early establishment of natural enemies are also a key factor in pest control strategies (Nieto et al 2006).…”

Section: Biological Control Of Pestsmentioning

confidence: 99%

Advances and Trends in Organic Fruit and Vegetable Farming Research

Dorais

Alsanius

2015

Horticultural Reviews: Volume 43

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“…Syrphid larvae are the most common predators of cabbage aphids feeding on B. oleracea in the region where these cabbage aphids were obtained (Chaplin-Kramer 2010) and are thought to play an important role in their control for this crop (van Emden 1963;Nieto et al 2006). Syrphid larvae were reared on aphids from the two different Brassica food sources and observed over the course of their larval development in a growth chamber at 18°C and a 16-h daylength.…”

Section: M P a C T S O F B R A S S I C A N I G R A O N A P H I D Smentioning

confidence: 99%

Chemically mediated tritrophic interactions: opposing effects of glucosinolates on a specialist herbivore and its predators

Chaplin‐Kramer

Kliebenstein

Chiem

et al. 2011

Journal of Applied Ecology

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Summary1. The occurrence of enemy-free space presents a challenge to the top-down control of agricultural pests by natural enemies, making bottom-up factors such as phytochemistry and plant distributions important considerations for successful pest management. Specialist herbivores like the cabbage aphid Brevicoryne brassicae co-opt the defence system of plants in the family Brassicaceae by sequestering glucosinolates to utilize in their own defence. The wild mustard Brassica nigra, an alternate host for cabbage aphids, contains more glucosinolates than cultivated Brassica oleracea, and these co-occur in agricultural landscapes. We examined trade-offs between aphid performance and predator impact on these two host plants to test for chemically mediated enemy-free space. 2. Glucosinolate content of broccoli B. oleracea and mustard B. nigra was measured in plant matter and in cabbage aphids feeding on each food source. Aphid development, aphid fecundity, predation and predator mortality, and field densities of aphids and their natural enemies were also tested for each food source. 3. Cabbage aphids growing on high glucosinolate plants like B. nigra contained more glucosinolates than aphids on lower glucosinolate B. oleracea. Aphids on B. nigra had shorter generation times and greater daily fecundity, while their predators (Diptera: Syrphidae) had lower feeding and higher mortality rates. Lower syrphid densities were found on B. nigra than on B. oleracea in the field. 4. Synthesis and applications. This study presents physiological and field evidence to suggest that weedy B. nigra may provide enemy-free space from an important predator. Habitat near crops should be examined for its potential to provide enemy-free space and compromise otherwise effective biological control. The issue of pest control must be considered from the bottom up as well as the top down.

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How Natural Enemies and Cabbage Aphid (Brevicoryne brassicaeL.) Population Dynamics Affect Organic Broccoli Harvest

Cited by 20 publications

References 15 publications

Field Abundance and Performance of Hoverflies (Diptera: Syrphidae) on Soybean Aphid

Field Abundance and Performance of Hoverflies (Diptera: Syrphidae) on Soybean Aphid

Advances and Trends in Organic Fruit and Vegetable Farming Research

Chemically mediated tritrophic interactions: opposing effects of glucosinolates on a specialist herbivore and its predators

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