scholarly journals Insecticidal activities of asarones identified in Acorus gramineus rhizome against Nilaparvata lugens (Homoptera: Delphacidae) and Plutella xylostella (Lepidoptera: Yponomeutoidae).

2002 ◽  
Vol 37 (3) ◽  
pp. 459-464 ◽  
Author(s):  
Hee-Kwon Lee ◽  
Chan Park ◽  
Young-Joon Ahn
Keyword(s):  
Plutella Xylostella ◽  
Nilaparvata Lugens ◽  
Acorus Gramineus ◽  
Insecticidal Activities

scholarly journals The Correlation of the Presence and Expression Levels of cry Genes with the Insecticidal Activities against Plutella xylostella for Bacillus thuringiensis Strains

Toxins ◽  
2014 ◽  
Vol 6 (8) ◽  
pp. 2453-2470 ◽  
Author(s):  
Ming-Lun Chen ◽  
Pin-Hsin Chen ◽  
Jen-Chieh Pang ◽  
Chia-Wei Lin ◽  
Chin-Fa Hwang ◽  
...  
Keyword(s):  
Bacillus Thuringiensis ◽  
Plutella Xylostella ◽  
Cry Genes ◽  
Expression Levels ◽  
Insecticidal Activities

scholarly journals Semisynthesis of some matrine ether derivatives as insecticidal agents

RSC Advances ◽  
2017 ◽  
Vol 7 (26) ◽  
pp. 15997-16004 ◽  
Author(s):  
Jiu-Lin Huang ◽  
Min Lv ◽  
Hui Xu
Keyword(s):  
Plutella Xylostella ◽  
Mythimna Separata ◽  
Insecticidal Activities

Compounds 4i and 4k exhibited more potent insecticidal activities than matrine against Plutella xylostella and Mythimna separata. These matrine derivatives may be considered as promising insecticidal candidates.

scholarly journals Design, Synthesis, and Biological Activities of Novel 1,3,5-Trimethylpyrazole-Containing Malonamide Derivatives

Molecules ◽  
2019 ◽  
Vol 24 (3) ◽  
pp. 562 ◽  
Author(s):  
Qi-Bo Li ◽  
Min Liao ◽  
Qing Liu ◽  
Tong Feng ◽  
Zhi-Yuan Xu ◽  
...  
Keyword(s):  
Plutella Xylostella ◽  
Mass Spectra ◽  
Biological Activities ◽  
Aphis Craccivora ◽  
Moderate Activity ◽  
Tetranychus Cinnabarinus ◽  
Substitution Pattern ◽  
Design Synthesis ◽  
Structural Modifications ◽  
Insecticidal Activities

New 1,3,5-trimethylpyrazole-containing malonamide derivatives based on pyflubumide were designed, synthesized, and characterized using 1H-NMR, 13C-NMR, and high-resolution mass spectra (HRMS). The results of preliminary bioassays showed that the target compounds possessed good activities against Tetranychus cinnabarinus, Plutella xylostella, and Aphis craccivora. Most of the target compounds exhibited moderate to good acaricidal activity against Tetranychus cinnabarinus at a concentration of 400 µg/mL, and some showed moderate activity at a concentration of 200 µg/mL; in particular, compounds 8m and 8p exhibited 70.0% mortality. In addition, some of the target compounds exhibited good insecticidal activities against Plutella xylostella at a concentration of 200 µg/mL, especially compounds 8i and 8o, which achieved 100.0% mortality at a concentration of 100 µg/mL. Interestingly, some of the target compounds exhibited potent anti-aphid activity against Aphis craccivora at a concentration of 200 µg/mL; furthermore, compounds 8p and 8q demonstrated 100.0% anti-aphid activity at a concentration of 50 µg/mL. The preliminary analyses of the structure–activity relationships (SAR) indicated that the acaricidal and insecticidal activities varied significantly depending on the type of substituent and substitution pattern, which provides guidance for the further investigation of such structural modifications.

Tetrafluorobenzyl Alcohol-Oriented Novel (S)-Enantiomeric Esters: Synthesis and Structure-Activity Relationship

2019 ◽  
Vol 15 (1) ◽  
pp. 98-102
Author(s):  
Wenda Wang ◽  
Haihuan Su ◽  
Huangyong Li ◽  
Xiufang Cao
Keyword(s):  
Asymmetric Synthesis ◽  
Insect Resistance ◽  
Insecticidal Activity ◽  
Plutella Xylostella ◽  
The Novel ◽  
Lead Compound ◽  
Tolerance Development ◽  
Structure Activity ◽  
Stereoselective Method ◽  
Insecticidal Activities

Background: Using constantly and widely chemistry insecticides has resulted in a selection burden and favored tolerance development in various insect species. Particularly, pyrethroids are the only one which can be used for net impregnation either ITNs or LLIN as yet, however, the excessive use of pyrethroids has led to many cases of insect resistance in worldwide. Therefore, it is urgent to develop novel insecticides fighting against this sort of resistance. Methods: Based on the preliminary studies, we explored a straightforward highly stereoselective method to achieve the novel chiral ester derivatives by using Oppolzer’s 10,2-camphorsultam as chiral controlling reagent. Results: A series of tetrafluorobenzyl alcohol oriented (S)-enantiomeric esters were designed and synthesized by the asymmetric synthesis. All the compounds exhibited moderate yields, and the original synthesized compounds have been evaluated for their potential insecticidal activity against Plutella xylostella compared with those of fenvalerate and D-trans-phenothrin, and some compounds presented excellent insecticidal activities. Conclusion: The bioassay illustrated that some of the compounds exhibit obviously insecticidal activities against Plutella xylostella, especially, the insecticidal activity of compound 5i was as good as commercial fenvalerate and D-trans-phenothrin, which can be used as a lead compound for further optimization.

Insecticidal activities of tea saponin against diamondback moth, Plutella xylostella and aphid, Aphis craccivora

Toxin Reviews ◽  
2017 ◽  
Vol 37 (1) ◽  
pp. 52-55 ◽  
Author(s):  
Shudh Kirti Dolma ◽  
Eshita Sharma ◽  
Ashu Gulati ◽  
S.G. Eswara Reddy
Keyword(s):  
Plutella Xylostella ◽  
Diamondback Moth ◽  
Aphis Craccivora ◽  
Tea Saponin ◽  
Insecticidal Activities

scholarly journals Keefektivan Beauveria bassiana (Bals.) Vuill. isolat Indigenous pagaralam sumatera selatan pada media beras terhadap larva Plutella xylostella Linn. (Lepidoptera: Yponomeutidae)

2017 ◽  
Vol 3 (1) ◽  
pp. 30 ◽  
Author(s):  
Yulia Pudjiastuti ◽  
Erfansyah Erfansyah ◽  
Siti Herlinda
Keyword(s):  
Beauveria Bassiana ◽  
Plutella Xylostella ◽  
Nilaparvata Lugens ◽  
Spore Density ◽  
Time Of Death ◽  
Hypothenemus Hampei ◽  
Third Instar Larvae

The objective of study was to investigate the effectiveness of Beauveria bassiana isolate cultured in half-ripe rice media against third-instar larvae of Plutella xylostella. The research used 10 isolates consisted of 4 isolates that were originnally collected from Pagaralam i.e. PD1 (isolated from P. xylostella cadaver), PD2, PD8, PD9B (from Crysodeixis chalcites cadaver), and 6 isolates from other areas as comparison, i.e. CCW3 (from Crysodeixis chalcites cadaver), BBL (from Hypothenemus hampei cadaver), CH (from Conomorpha cramerella cadaver), CPJW (from H. hampei cadavi), WC (from Nilaparvata lugens cadaver), and WSJT (from Leptocorixa acuta cadaver). The parameters that were measured were mortality of larvae, time of death and behaviour of larvae after application. Result of the test showed that B. bassiana isolated from L. acuta (WSJT isolate) caused the highest mortality i.e. 73.34 %, with the highest spore density 5.6x107 spore ml-1 (in half-rice media) and 3.0x107 spore ml-1 (GYA media). The lowest LT50 was 19.27 hours, and was obtained from the application of PD9B. After application of B. bassiana, the behaviour of larvae was slightly change from a healthy one to less in consuming of food and then die.

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