Synthesis and Insect Growth Regulatory Activity of 1,5-Disubstituted Imidazoles with Non-terpene Chains

1991 ◽  
Vol 55 (12) ◽  
pp. 2999-3004
Eiichi Kuwano ◽  
Tomomi Hisano ◽  
Morifusa Eto
2006 ◽  
Vol 1 (7) ◽  
pp. 1934578X0600100 ◽  
Najam A. Shakil ◽  
Dinesh B. Saxena

Cordifolin, a chalcone reported for the first time from a natural source, has been isolated from the ethanolic extract of the woody stem of Giloe (Tinospora cordifolia). The chemical structure was established as 1-(2′,3′,4′-trihydroxyphenyl)-3-(4′‘-methoxyphenyl)-propen-1-one by spectroscopic analysis. The compound exhibited good insect growth regulatory activity against larvae of Spodoptera litura.

10.5109/23947 ◽  
1990 ◽  
Vol 35 (1/2) ◽  
pp. 35-41
Eiichi Kuwano ◽  
Masamichi Kikuchi ◽  
Morifusa Eto

1983 ◽  
pp. 97-102
Akinori Suzuki ◽  
Hiromichi Nagasawa ◽  
Shogo Matsumoto ◽  
Hiroshi Kataoka ◽  
Akira Isogai ◽  

2018 ◽  
Vol 22 (3) ◽  
pp. 647-655 ◽  
Suresh D. Bagul ◽  
Jamatsing D. Rajput ◽  
Chitra Srivastava ◽  
Ratnamala S. Bendre

2011 ◽  
Vol 6 (8) ◽  
pp. 1934578X1100600
A. Hincapié L. Carlos ◽  
Monsalve F. Zulma ◽  
Katherine Parada ◽  
Claudio Lamilla ◽  
Julio Alarcón ◽  

The genus Blechnum has 13 species that are common plants, well-distributed in Chile. Here, we report a phytochemical analysis of B. chilense (Kaulf.) Mett., as well as the insecticidal effects of extracts of this plant. From the n-hexane fraction four phytoecdysones were isolated: ecdysone, ponasterone, shidasterone and 2-deoxycrustecdysone. A bioassay with Drosophila melanogaster larvae was used to evaluate insecticidal activity. The EtOAc and n-hexane fractions at 800 ppm caused 66.7 and 50.0% larval mortality, respectively. Treatments with both extracts at 800 ppm caused the greatest larval mortality, whereas treatments with 500 and 200 ppm induced premature pupation compared with the control and the highest adult mortality, probably due to interference with ecdysteroid metabolism and inhibition of ecdysis triggering hormone (ETH). The dead adult flies exhibited malformations.

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