scholarly journals Life-History and Behavior of the Diamondback Moth Plutella xylostella on Brassicaceae Cultivars over Multiple Generations

2020 ◽  
Author(s):  
Sergio Antonio De Bortoli ◽  
Wanderlei Dibelli ◽  
Dagmara Ramalho ◽  
Robério C S Neves ◽  
Caroline Placidi De Bortoli ◽  
...  
Keyword(s):  
Life History ◽  
Plutella Xylostella ◽  
Diamondback Moth ◽  
Multiple Generations ◽  
And Behavior

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.

Classification of crucifer cultivars based on the life-history of diamondback moth (Plutella xylostella)

2013 ◽  
Vol 59 (1) ◽  
pp. 73-78 ◽  
Author(s):  
Sergio A. De Bortoli ◽  
Alessandra M. Vacari ◽  
Roberto M. Goulart ◽  
Antonio S. Ferraudo ◽  
Haroldo X.L. Volpe
Keyword(s):  
Life History ◽  
Plutella Xylostella ◽  
Diamondback Moth ◽  
History Of

Molecular characterization and enzyme inhibition studies of NADP+- farnesol dehydrogenase from diamondback moth, Plutella xylostella (Lepidoptera: Plutellidae)

2021 ◽  
Author(s):  
Anis-Nadyra Zifruddin ◽  
Khairunnisa-Atiqah Mohamad-Khalid ◽  
Saidi-Adha Suhaimi ◽  
Zeti-Azura Mohamed-Hussein ◽  
Maizom Hassan
Keyword(s):  
Plutella Xylostella ◽  
Diamondback Moth ◽  
Maximum Activity ◽  
Binding Region ◽  
Relative Molecular Weight ◽  
Insect Reproduction ◽  
And Behavior ◽  
Inhibition Studies ◽  
Identification And Characterization

Abstract Juvenile hormone III (JH III) plays an important role in insect reproduction, development, and behavior. The second branch of JH III production includes oxidation of farnesol to farnesal by farnesol dehydrogenase. This study reported the identification and characterization of Plutella xylostella farnesol dehydrogenase (PxFoLDH). Our results showed that PxFoLDH belongs to the short-chain dehydrogenase/reductase superfamily, consisting of a single domain with a structurally conserved Rossman fold, an NAD(P) (H)—binding region and a structurally diverse C- terminal region. The purified enzyme displayed maximum activity at 55 °C with pH 9.5 and was stable in the temperature below 70 °C. PxFoLDH was determined to be a monomer with a relative molecular weight of 27 kDa and highly specific for trans, trans-farnesol and NADP+. Among analog inhibitors tested, farnesyl acetate was the most effective inhibitor with the lowest Ki value of 0.02 µM. Our findings showed this purified enzyme may represent as NADP+-farnesol dehydrogenase.

LIFE HISTORY OF PLUTELLA PORRECTELLA, A RELATIVE OF THE DIAMONDBACK MOTH, PLUTELLA XYLOSTELLA (LEPIDOPTERA: PLUTELLIDAE)

1984 ◽  
Vol 116 (7) ◽  
pp. 913-917 ◽  
Author(s):  
D. B. Smith ◽  
M. K. Sears
Keyword(s):  
Life History ◽  
Plutella Xylostella ◽  
Diamondback Moth ◽  
Parasitic Wasp ◽  
Instar Larva ◽  
Alternative Host ◽  
Apical Buds ◽  
Two Generations ◽  
History Of ◽  
Early Instar

AbstractAlthough Plutella porrectella (L.) is similar in appearance to the diamondback moth, P. xylostella (L.), several aspects of its biology are quite different from its more common relative. P. porrectella completed two generations per year and overwintered as an early-instar larva within apical buds of dame's rocket, Hesperis matronalis (L.). Four instars were observed in larvae reared in the laboratory. An average of 30 days was required for completion of one generation at 25 °C. This species does not seem to be an alternative host for parasites of the diamondback moth as only a single parasitic wasp, Itoplectis conquisitor (Say), was reared from 228 larvae collected in the field.

SEASONAL POPULATIONS OF THE DIAMONDBACK MOTH, PLUTELLA XYLOSTELLA (LEPIDOPTERA: PLUTELLIDAE) IN RELATION TO DAY-DEGREE ACCUMULATION

1981 ◽  
Vol 113 (2) ◽  
pp. 127-131 ◽  
Author(s):  
R. A. Butts ◽  
F. L. McEwen
Keyword(s):  
Life History ◽  
Plutella Xylostella ◽  
Diamondback Moth ◽  
Threshold Temperature ◽  
Sticky Traps ◽  
Brussels Sprouts ◽  
Fifth Generation ◽  
History Of

AbstractThe life history of Plutella xylostella (L.) was studied in plantings of Brussels sprouts at Cambridge, Ontario in 1977 and 1978. Adults were monitored by using sticky traps constructed of bristol board; eggs, larvae, and pupae were monitored by sampling plants. In both years in the spring, some of the first eggs were found before adults were caught in the traps. The trap collections indicated four periods of adult flight each year. During the last period of flight in 1977 eggs were laid; however, the fifth generation was not completed. Day-degree analyses of the populations indicated that 293 day-degrees (C) above a threshold temperature (7.3°C) were required to complete one generation. Using day-degree accumulations it was possible to predict accurately the periods when various stages of the pest were dominant even though there was considerable overlap of various stages in the field.

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