Developing nominal threshold levels for Phyllotreta cruciferae (Coleoptera: Chrysomelidae) damage on canola in Montana, USA

Tangtrakulwanich, Khanobporn; Reddy, Gadi V. P.; Wu, Shaohui; Miller, John H.; Ophus, Victoria L.; Prewett, Julie

doi:10.1016/j.cropro.2014.08.013

Cited by 15 publications

(4 citation statements)

References 34 publications

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“…Flea beetles, particularly crucifer specialists in the genera Phyllotreta and Psylliodes (Coleoptera: Chrysomelidae), can also be important pests (Cárcamo et al 2008, Soroka and Grenkow 2013, Tangtrakulwanich et al 2014. Some Phyllotreta spp.…”

Section: Diamondback Moth and Other Lepidopteran Pestsmentioning

confidence: 99%

Trap Crops and Insectary Plants in the Order Brassicales

Badenes‐Pérez

2018

Annals of the Entomological Society of America

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This paper reviews the most important cases of trap crops and insectary plants in the order Brassicales. Most trap crops in the order Brassicales target insects that are specialist in plants belonging to this order, such as the diamondback moth, Plutella xylostella L. (Lepidoptera: Plutellidae), the pollen beetle, Meligethes aeneus Fabricius (Coleoptera: Nitidulidae), and flea beetles in the genera Phyllotreta and Psylliodes (Coleoptera: Chrysomelidae). In most cases, the mode of action of these trap crops is the preferential attraction of the insect pest for the trap crop located next to the main crop. With one exception, these trap crops in the order Brassicales have been used with brassicaceous crops. Insectary plants in the order Brassicales attract a wide variety of natural enemies, but most studies focus on their effect on aphidofagous hoverflies and parasitoids. The parasitoids benefiting from insectary plants in the order Brassicales target insects pests ranging from specialists, such as P. xylostella, to highly polyfagous, such as the stink bugs Euschistus conspersus Uhler and Thyanta pallidovirens Stål (Hemiptera: Pentatomidae). In the order Brassicales, the three most common trap crops are Indian mustard, Brassica juncea (L.) Czern, Chinese cabbage, Brassica rapa L., and yellow rocket, Barbarea vulgaris R. Br., while the three most common insectary plants are sweet alyssum, Lobularia maritima (L.) Desv., white mustard, Sinapis alba L, and B. vulgaris. Except for Tropaeolum majus L. (Tropaeolaceae) and Capparis decidua (Forssk.) Edgew. (Capparaceae), the tested trap crops and insectary plants in the order Brassicales belong to the family Brassicaceae.

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Section: Diamondback Moth and Other Lepidopteran Pestsmentioning

confidence: 99%

Trap Crops and Insectary Plants in the Order Brassicales

Badenes‐Pérez

2018

Annals of the Entomological Society of America

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“…These conditions together with other biotic and abiotic factors caused P. cruciferae feeding pressure as determined by pre-treatment ratings to be moderate at WTARC (1-3.3% leaf area injury), high at Sweet Grass (2-5.3% leaf area injury), and extremely high at Cutbank (4.3-8.6% leaf area injury). Cotyledon and leaf injury did exceed the economic threshold of 15-20% leaf area defoliation across locations, especially at 14 DPT (Table 2; Tangtrakulwanich et al 2014). In the water treatments, there were high levels of damage (WTARC: 5.9-15.6%, Sweet Grass: 8.9-21.9%, and Cutbank: 16.8-22.3%) at 7 to 14 DPT.…”

Section: Resultsmentioning

confidence: 92%

Efficacy of Entomopathogenic Nematodes and Sprayable Polymer Gel Against Crucifer Flea Beetle (Coleoptera: Chrysomelidae) on Canola

Antwi

Reddy

2016

J Econ Entomol

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The crucifer flea beetle, Phyllotreta cruciferae (Goeze), is a key pest of canola (Brassica napus L.) in the northern Great Plains of North America. The efficacies of entomopathogenic nematodes (Steinernema spp. and Heterorhabditis spp.), a sprayable polymer gel, and a combination of both were assessed on canola for flea beetle management. Plots were treated soon after colonization by adult flea beetles, when canola was in the cotyledon to one-leaf stage. Ten plants along a 3.6-m section of row were selected and rated at pre-treatment and 7 and 14 d post treatment using the damage-rating scheme advanced by the European Plant Protection Organization, where 1 = 0%, 2 = 2%, 3 = 5%, 4 = 10%, and 5 = 25% leaf area injury. Under moderate flea beetle feeding pressure (1-3.3% leaf area damaged), seeds treated with Gaucho 600 (Bayer CropScience LP Raleigh, NC) (imidacloprid) produced the highest yield (843.2 kg/ha). Meanwhile, Barricade (Barricade International, Inc. Hobe Sound, FL) (polymer gel; 1%) + Scanmask (BioLogic Company Inc, Willow Hill, PA) (Steinernema feltiae) resulted in the highest yields: 1020.8 kg/ha under high (2.0-5.3% leaf area damaged), and 670.2 kg/ha at extremely high (4.3-8.6 % leaf area damaged) feeding pressure. Our results suggest that Barricade (1%) + Scanmask (S. feltiae) can serve as an alternative to the conventional chemical seed treatment. Moreover, Scanmask (S. feltiae) can be used to complement the effects of seed treatment after its protection has run out.

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“…Economic thresholds are used in various crops to trigger foliar sprays of insecticide against flea beetles. When prophylactic seed insecticide treatments fail, a nominal threshold of 25% defoliation before the four-leaf stage of SOSR is used for foliar sprays against Phyllotreta flea beetles in North America (35); however, recent experiments suggest reducing this threshold to 15-20% defoliation (126). Similarly, an economic injury level of 11% defoliation has been recently proposed for Sweden, mainly based on the low price of pyrethroid insecticides (84).…”

Section: Management Of Flea Beetlesmentioning

confidence: 99%

Biology, Ecology, and Management of Flea Beetles in Brassica Crops

Li,

Costamagna,

Beran

et al. 2024

Annu. Rev. Entomol.

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Brassica vegetable and oilseed crops are attacked by several different flea beetle species (Chrysomelidae: Alticini). Over the past decades, most research has focused on two Phyllotreta species, Phyllotreta striolata and Phyllotreta cruciferae, which are major pests of oilseed rape in North America. More recently, and especially after the ban of neonicotinoids in the European Union, the cabbage stem flea beetle, Psylliodes chrysocephala, has become greatly important and is now considered to be the major pest of winter oilseed rape in Europe. The major challenges to flea beetle control are the prediction of population dynamics in the field, differential susceptibility to insecticides, and the lack of resistant plant cultivars and other economically viable alternative management strategies. At the same time, many fundamental aspects of flea beetle biology and ecology, which may be relevant for the development of sustainable control strategies, are not well understood. This review focuses on the interactions between flea beetles and plants and summarizes the literature on current management strategies with an emphasis on the potential for biological control in flea beetle management.

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Developing nominal threshold levels for Phyllotreta cruciferae (Coleoptera: Chrysomelidae) damage on canola in Montana, USA

Cited by 15 publications

References 34 publications

Trap Crops and Insectary Plants in the Order Brassicales

Trap Crops and Insectary Plants in the Order Brassicales

Efficacy of Entomopathogenic Nematodes and Sprayable Polymer Gel Against Crucifer Flea Beetle (Coleoptera: Chrysomelidae) on Canola

Biology, Ecology, and Management of Flea Beetles in Brassica Crops

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