Observations on Distribution, Seasonal Life History, and Abundance of Flea Beetles (Coleoptera: Chrysomelidae) That Infest Rape Crops in Manitoba

Wylie, H. G.

doi:10.4039/ent1111345-12

Cited by 40 publications

(58 citation statements)

References 8 publications

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“…Eggs are laid at the soil-stem interface of the host plant. Larvae feed on fine roots and root hairs without mining into the roots, and eventually pupate in the soil (Wylie 1979;Knodel and Olson 2002). P. striolata is multivoltine in southern China, producing 7-8 generations per year.…”

Section: Introductionmentioning

confidence: 99%

Efficacy of entomopathogenic nematodes (Rhabditida: Steinernematidae and Heterorhabditidae) against the striped flea beetle, Phyllotreta striolata

Xu¹,

Clercq

Moens

et al. 2010

BioControl

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The striped flea beetle, Phyllotreta striolata (F.) (Coleoptera: Chrysomelidae), is an economically important pest on crucifer vegetables worldwide. Twenty isolates of entomopathogenic nematodes (EPNs) (Rhabditida: Steinernematidae and Heterorhabditidae) were evaluated against soil-dwelling stages of the flea beetle in the laboratory. The corrected mortalities and reproduction rates at a concentration of 36 infective juveniles (IJs) cm -2 surface area of sand against third instars of the pest greatly differed among the tested isolates, ranging from 6.7% to 100%. When tested over a range of temperatures from 15°C to 35°C, 25°C was found to be the optimal temperature for four selected nematode isolates (Steinernema carpocapsae All, Steinernema pakistanense 94-1, Heterorhabditis indica LN2 and H. indica 212-2) to infect the third instar and reproduce in the cadavers. S. pakistanense 94-1 and H. indica 212-2 showed markedly greater heat-tolerance compared to S. carpocapsae All and H. indica LN2. Corrected mortalities and reproduction rates increased as the concentration of IJs increased from 4 to 36 IJs cm -2 . The LC 50 values of S. carpocapsae All, S. pakistanense 94-1, H. indica LN2 and 212-2 were 17.1, 15.5, 6.5 and 5.9 IJs cm -2 , respectively. The third instars larvae and pupae of P. striolata were more susceptible to the four nematode isolates than the first and second instars. Higher pathogenicity and greater heat tolerance and reproduction potential makes H. indica 212-2 the most promising candidate for the biological control of P. striolata under the field conditions of South China.

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Section: Introductionmentioning

confidence: 99%

Efficacy of entomopathogenic nematodes (Rhabditida: Steinernematidae and Heterorhabditidae) against the striped flea beetle, Phyllotreta striolata

Xu¹,

Clercq

Moens

et al. 2010

BioControl

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“…However, these two herbivores differ in style of feeding. Phyllotreta cruciferae adults make pits on the leaf surface (Kinoshita et al 1979;Wylie 1979), whereas Pieris rapae larvae chew along the leaf margin (Root 1973). Both herbivores are specialists on mustards.…”

Section: Introductionmentioning

confidence: 99%

Differential induction of trichomes by three herbivores of black mustard

2002

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Specificity of plant induction responses may be important to the interactions between mustards and insect herbivores. This study compared the effects of the cabbage white butterfly, Pieris rapae (L.), cabbage looper, Trichoplusia ni (Hubner), and the mustard flea beetle, Phyllotreta cruciferae (Goeze) on induction of leaf trichome density, sinigrin concentration, and nitrogen concentration in black mustard, Brassica nigra (L.) Koch. Plants were damaged for 12 h at the four-leaf stage, with effort made to standardize the damage applied. Induction responses were measured on the fifth, seventh, ninth, and 11th leaves counted from the cotyledons. Seventh leaves of plants damaged by P. rapae had 76% more trichomes per unit area than controls, whereas equivalent leaves of plants damaged by the other two herbivores exhibited no response. Ninth leaves of plants damaged by T. ni had 113% more trichomes per unit area than controls, whereas equivalent leaves of plants damaged by the other two herbivores exhibited no response. Trichome densities of fifth and 11th leaves did not respond to treatments. Leaf sinigrin and nitrogen concentrations were not affected by the damage treatments. Differential plant trichome response to P. rapae and T. ni may have been due to differences in location of feeding during the damage treatment. Other cues, such as salivary components, may also have differed between the two herbivores. This study is one of the first to document differential effects of two herbivores from the same guild on induction of morphological resistance.

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“…The hatched larvae feed on fine roots and root hairs, and eventually pupate in the soil. The pupal stage takes about seven days (Burgess 1977;Wylie 1979;Zhang et al 2000). In Southern China, P. striolata causes year-around damage because of the suitable climate and the continuous cultivation of their preferred food plants.…”

Section: Introductionmentioning

confidence: 99%

Field evaluation of entomopathogenic nematodes for biological control of striped flea beetle, Phyllotreta striolata (Coleoptera: Chrysomelidae)

Yan

Han²,

Moens

et al. 2012

BioControl

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The striped flea beetle, Phyllotreta striolata (F.) (Coleoptera: Chrysomelidae) is a key pest of crucifer vegetables in Southern China. The use of entomopathogenic nematodes (EPNs) within an integrated pest management approach may offer an effective and environmentally safe strategy to suppress outbreaks of this pest. In the present study, the efficacy of Steinernema carpocapsae All and Heterorhabditis indica LN2 for the control of P. striolata in the field was evaluated, as well as the combined application of EPNs and azadirachtin against the pest. Both nematode species were capable of reducing populations of the soil-dwelling stages of P. striolata, thus leading to a reduction of the adult populations and the associated shot-hole damage on the leaves. Nematode treatments also increased cabbage yields as compared to the control and azadirachtin treatments alone. Azadirachtin alone was not effective to prevent damage by P. striolata, but it could enhance the control effect of S. carpocapsae shortly after application. Osmotically treated infective juveniles (IJs) of S. carpocapsae All performed as well as untreated IJs.

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Observations on Distribution, Seasonal Life History, and Abundance of Flea Beetles (Coleoptera: Chrysomelidae) That Infest Rape Crops in Manitoba

Cited by 40 publications

References 8 publications

Efficacy of entomopathogenic nematodes (Rhabditida: Steinernematidae and Heterorhabditidae) against the striped flea beetle, Phyllotreta striolata

Efficacy of entomopathogenic nematodes (Rhabditida: Steinernematidae and Heterorhabditidae) against the striped flea beetle, Phyllotreta striolata

Differential induction of trichomes by three herbivores of black mustard

Field evaluation of entomopathogenic nematodes for biological control of striped flea beetle, Phyllotreta striolata (Coleoptera: Chrysomelidae)

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