Electrophysiology and behavior feedback of diamondback moth,Plutella xylostella, to volatile secondary metabolites emitted by Chinese cabbage

2001 ◽  
Vol 46 (24) ◽  
pp. 2086-2088 ◽  
Author(s):  
Han Baoyu ◽  
Zhang Zhongning ◽  
Fang Yuling
Keyword(s):  
Secondary Metabolites ◽  
Chinese Cabbage ◽  
Plutella Xylostella ◽  
Diamondback Moth ◽  
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.

scholarly journals Laboratory evaluations of a wild crucifer Barbarea vulgaris as a management tool for the diamondback moth Plutella xylostella (Lepidoptera: Plutellidae)

2004 ◽  
Vol 94 (6) ◽  
pp. 509-516 ◽  
Author(s):  
Jian-hua Lu ◽  
Shu-sheng Liu ◽  
A.M. Shelton
Keyword(s):  
Chinese Cabbage ◽  
Plutella Xylostella ◽  
Insect Pest ◽  
Diamondback Moth ◽  
Management Tool ◽  
Trap Crop ◽  
Barbarea Vulgaris ◽  
Dead End ◽  
Trap Cropping ◽  
Important Pest

AbstractThe term ‘dead-end trap cropping’ has recently been proposed to identify a plant that is highly attractive for oviposition by an insect pest, but on which offspring of the pest cannot survive. The potential of the wild crucifer Barbarea vulgaris R. Br. to allure and serve as a dead-end trap crop for the diamondback moth Plutella xylostella (L.), an important pest of cruciferous crops worldwide, was examined in laboratory experiments. When P. xylostella adults were provided with a dual-choice of plants of B. vulgaris, and Chinese cabbage Brassica campestris (L.), in one arena, adult moths laid 2.5–6.8 times more eggs on the former than on the latter. When P. xylostella adults were provided with a dual-choice of plants of B. vulgaris and common cabbage Brassica oleracea L., adult moths laid virtually all their eggs on the former and ignored the latter. Nearly all P. xylostella eggs laid on the three species of plants hatched successfully, but nearly all individuals on plants of B. vulgaris died as neonates or early instar larvae, while 87–100% of the larvae on Chinese cabbage and common cabbage survived to pupation. Dual choice tests with a Y-tube olfactometer showed that volatiles from B. vulgaris were much more attractive to P. xylostella adults than those from common cabbage. The results demonstrate that B. vulgaris has a great potential as a dead-end trap crop for improving management of P. xylostella. Factors that may influence the feasibility of using B. vulgaris as a trap crop in the field are discussed, and ways to utilize this plant are proposed.

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

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.

scholarly journals Role of Saponins in Plant Defense against the Diamondback Moth, Plutella xylostella (L.)

2017 ◽  
Author(s):  
Mubasher Hussain ◽  
Muhammad Qasim ◽  
Bamisope Steve Bamisile ◽  
Liande Wang
Keyword(s):  
Secondary Metabolites ◽  
Plant Defense ◽  
Host Plant ◽  
Plutella Xylostella ◽  
Defense Mechanism ◽  
Diamondback Moth ◽  
Plant Secondary Metabolites ◽  
Feeding Deterrents ◽  
Triterpenoid Saponins ◽  
Saponin Content

The diamondback moth (DBM), Plutella xylostella L. (Lepidoptera: Plutellidae) is very destructive crucifers specialized pest that has resulted in significant crop losses worldwide. The pest is well attracted to glucosinolate-containing crucifers such as; Barbarea vulgaris (Brassicaceae), and generally to other plants in the genus Barbarea. B. vulgaris on their part, build up resistance against DBM and other herbivorous insects using glucosinolates; that are plant secondary metabolites used in plant defense–contained only in plants of the order Brassicales. Aside glucosinolates, plants in this genus Barbarea (Brassicaceae) also contain saponins; which is toxic to insects and act as feeding deterrents for plant herbivores, most importantly, DBM, as it was found to prevent the survival of DBM larvae on the plant. Saponins are plant secondary metabolites have been established in higher concentrations in younger in contrast to older leaves within the same plant. Previous studies have found a relationship between ontogenetical changes in the host plant’s saponin content and attraction/resistance to P. xylostella. The younger leaves recorded higher concentrations of glucosinolates and saponins, which naturally attracts the plant herbivores. DBM was reported to have evolved mechanisms to avoid the toxicity of the former. The plant-herbivore had adapted glucosinolates for host plant recognition, feeding and oviposition stimulants. Despite the adaptation for oviposition by P. xylostella adults, larvae of the insect cannot survive on the same plant. An example is in some varieties of B. vulgaris. The triterpenoid saponins which act as feeding deterrents in larvae are responsible for this direct defense mechanism against P. xylostella. In the future, trials by plant breeders could aim at transferring this insect resistance to other crops. The previous trials had limited because of lack of knowledge on the biosynthetic pathways and regulatory networks of saponins. Herein, we discussed exclusively; saponins mediated plant defense mechanisms against the DBM.

Mutation of P‐element somatic inhibitor induces male sterility in the diamondback moth, Plutella xylostella

2021 ◽  
Author(s):  
Yaohui Wang ◽  
Xia Xu ◽  
Xi’en Chen ◽  
Xiaowei Li ◽  
Honglun Bi ◽  
...  
Keyword(s):  
Male Sterility ◽  
Plutella Xylostella ◽  
Diamondback Moth ◽  
P Element
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