Identification of leek-moth and diamondback-moth frass volatiles that stimulate parasitoid,Diadromus pulchellus

1989 ◽  
Vol 15 (4) ◽  
pp. 1391-1398 ◽  
Author(s):  
Jacques Auger ◽  
Chantal Lecomte ◽  
Jacky Paris ◽  
Eric Thibout
Keyword(s):  
Diamondback Moth ◽  
Diadromus Pulchellus ◽  
Leek Moth

Free serosal cells originating from the embryo of the wasp Diadromus pulchellus in the pupal body of parasitized leek-moth, Acrolepiosis assectella. Are these cells teratocyte-like?

1999 ◽  
Vol 45 (5) ◽  
pp. 479-484 ◽  
Author(s):  
Florence Rouleux-Bonnin ◽  
Sylvaine Renault ◽  
Alain Rabouille ◽  
Georges Periquet ◽  
Yves Bigot
Keyword(s):  
Diadromus Pulchellus ◽  
Leek Moth

scholarly journals Native range assessment of classical biological control agents: impact of inundative releases as pre-introduction evaluation

2009 ◽  
Vol 100 (4) ◽  
pp. 387-394 ◽  
Author(s):  
W.H. Jenner ◽  
P.G. Mason ◽  
N. Cappuccino ◽  
U. Kuhlmann
Keyword(s):  
Classical Biological Control ◽  
Field Trials ◽  
Native Range ◽  
Naturally Occurring ◽  
Diadromus Pulchellus ◽  
Pupal Parasitism ◽  
Field Efficacy ◽  
Pupal Mortality ◽  
Field Plots ◽  
Leek Moth

AbstractDiadromus pulchellus Wesmael (Hymenoptera: Ichneumonidae) is a pupal parasitoid under consideration for introduction into Canada for the control of the invasive leek moth, Acrolepiopsis assectella (Zeller) (Lepidoptera: Acrolepiidae). Since study of the parasitoid outside of quarantine was not permitted in Canada at the time of this project, we assessed its efficacy via field trials in its native range in central Europe. This was done by simulating introductory releases that would eventually take place in Canada when a permit for release is obtained. In 2007 and 2008, experimental leek plots were artificially infested with pest larvae to mimic the higher pest densities common in Canada. Based on a preliminary experiment showing that leek moth pupae were suitable for parasitism up to 5–6 days after pupation, D. pulchellus adults were mass-released into the field plots when the first host cocoons were observed. The laboratory-reared agents reproduced successfully in all trials and radically reduced leek moth survival. Taking into account background parasitism caused by naturally occurring D. pulchellus, the released agents parasitized at least 15.8%, 43.9%, 48.1% and 58.8% of the available hosts in the four release trials. When this significant contribution to leek moth mortality is added to previously published life tables, in which pupal parasitism was absent, the total pupal mortality increases from 60.1% to 76.7%. This study demonstrates how field trials involving environmental manipulation in an agent's native range can yield predictions of the agent's field efficacy once introduced into a novel area.

Effects of rhizobacteria on the biology and behavior of Plutella xylostella (Lepidoptera: Plutellidae)

2017 ◽  
Vol 43 (2) ◽  
pp. 195
Author(s):  
Robson Thomaz Thuler ◽  
Fernando Henrique Iost Filho ◽  
Hamilton César De Oliveira Charlo ◽  
Sergio Antônio De Bortoli
Keyword(s):  
Plutella Xylostella ◽  
Diamondback Moth ◽  
Insect Behavior ◽  
Control Treatment ◽  
Pupal Weight ◽  
Larval Feeding ◽  
Direct Effects ◽  
Plant Feeding ◽  
Kluyvera Ascorbata ◽  
And Behavior

Plant induced resistance is a tool for integrated pest management, aimed at increasing plant defense against stress, which is compatible with other techniques. Rhizobacteria act in the plant through metabolic changes and may have direct effects on plant-feeding insects. The objective of this study was to determine the effects of cabbage plants inoculated with rhizobacteria on the biology and behavior of diamondback moth, Plutella xylostella (Lepidoptera: Plutellidae). Cabbage seeds inoculated with 12 rhizobacteria strains were sowed in polystyrene trays and later transplanted into the greenhouse. The cabbage plants with sufficient size to support stress were then infested with diamondback moth caterpillars. Later, healthy leaves suffering injuries were collected and taken to the laboratory to feed P. xylostella second instar caterpillars that were evaluated for larval and pupal viability and duration, pupal weight, and sex ratio. The reduction of leaf area was then calculated as a measure of the amount of larval feeding. Non-preference for feeding and oviposition assays were also performed, by comparing the control treatment and plants inoculated with different rhizobacterial strains. Plants inoculated with the strains EN4 of Kluyvera ascorbata and HPF14 of Bacillus thuringiensis negatively affected the biological characteristics of P. xylostella when such traits were evaluated together, without directly affecting the insect behavior.

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