Results 261 to 270 of about 30,589 (307)

Insecticidal activity of the enantiomers of fipronil

Pest Management Science, 2003
Abstract The two enantiomers of the insecticide fipronil were made by preparative HPLC. The insecticidal activities of the racemic mixture and the two enantiomers against selected agricultural or household pests (cotton stainer, Dysdercus cingulatus F; grain weevil,
Harald B, Teicher, Britt, Kofoed-Hansen, Niels, Jacobsen   +2 more
openaire   +2 more sources

Insecticidal activity of Vitex mollis

Fitoterapia, 2007
Organic extracts from the leaves of Vitex mollis were assessed for their toxic effect on fall armyworm neonate larvae (Spodoptera frugiperda), an important insect pest of corn. The extracts showed insecticidal and insect growth regulatory activity, being CHCl(3)-MeOH (1:1) extract the most active, also found to be toxic in the Artemia salina test.
V, Rodríguez-López, M Z, Figueroa-Suárez, T, Rodríguez, E, Aranda   +3 more
openaire   +2 more sources

The biology of insecticidal activity and resistance

Insect Biochemistry and Molecular Biology, 2011
Identifying insecticide resistance mechanisms is paramount for pest insect control, as the understandings that underpin insect control strategies must provide ways of detecting and managing resistance. Insecticide resistance studies rely heavily on detailed biochemical and genetic analyses.
Trent, Perry, Philip, Batterham, Phillip J, Daborn   +2 more
openaire   +2 more sources

Comparisons of Insecticidal Activation

Nature, 1952
VARIOUS substances activate certain insecticides, especially the pyrethrins; that is to say, these substances, though themselves non-toxic, intensify the toxic action of pyrethrins or other insecticides upon insects. However, no attempt seems to have been made up to now to compare activation effects quantitatively.
openaire   +2 more sources

Search for insecticides: Chemical constitution and insecticidal activity

Journal of the Science of Food and Agriculture, 1950
AbstractThe synthesis of a number of compounds containing mostly a chlorobenzene nucleus as the toxic grouping and a CCl2 (as CHOH·CC13, COCC13, O·COCC13 or > CHCC13) or a COCH3 group as the chief lipoid‐soluble component, has been described by the authors in the earlier papers of this series.2, 3, 4, 5 This paper incorporates the results of ...
P. M. Bhargava, A. B. Sen
openaire   +1 more source

Insecticidal activity of N‐arylalkylbenzhydrolpiperidines

Pest Management Science, 2002
AbstractBenzhydrolpiperidine (BZP) insecticides represent a novel class of chemistry. Their specificity and efficacy as well as their low mammalian toxicity give them excellent potential for commercialization. Several N‐arylalkylbenzhydrolpiperidines were tested for activity against a variety of insects in the laboratory and greenhouse.
Joel M, Wierenga, Dennis L, Warkentin, Charles A, Staetz, Daniel L, Pitts, Jane A, Dybas   +4 more
openaire   +2 more sources

Studies in Insecticidal Activity

Journal of Economic Entomology, 1928
An exact procedure for the testing of insecticidal fumigants for use in (A) storage warehouses and (B) grain elevators, etc., is described.
C. H. Peet, A. G. Grady
openaire   +1 more source

Insecticidal Effects of Activated Charcoal and Clays

Nature, 1959
BRISCOE1, Kitchner et al. 2, Wigglesworth3, and Parkin4 have studied the ‘inert’ dusts for their insecticidal action. Reports on the insecticidal properties of ‘inert’ dusts, particularly of silica, coal ash, diamond, ‘Carborundum’, dusts from blast furnaces, flint, felspar, magnesite and dolomite are available1,2,4.
S K, MAJUMDER, K S, NARASIMHAN, V, SUBRAHMANYAN   +2 more
openaire   +2 more sources

Synthesis and insecticidal activity of new pyrethroids

Pest Management Science, 2009
AbstractBACKGROUND: Pyrethroids are among the most potent pesticides known, with great potential for structural variation with retention or enhancement of potency. The simple methyl ester is easier to prepare (at least one step shorter) than the more complex pyrethroids modified on the alcohol moiety.
Flaviano O, Silvério, Elson S, de Alvarenga, Shaiene C, Moreno, Marcelo C, Picanço   +3 more
openaire   +2 more sources

Synthesis and photoactivated insecticidal activity of tetraethynylsilanes

Journal of Photochemistry and Photobiology B: Biology, 2010
A series of tetraethynylsilanes (TETS) have been synthesized by reaction of silicon tetrachloride (SiCl(4)) with Ar-C triple bond CLi, which was prepared in situ by treatment of Ar-C triple bond CH with n-BuLi. For these TETS thus prepared, their photoactivated insecticidal activities against the 4th-instar larvae of Aedes albopictus (Skuse) were ...
Guang, Shao, Ding-Xin, Jiang, Han-Hong, Xu, Wei, Zeng, Hui-Juan, Yu, Yong-Qing, Tian   +5 more
openaire   +2 more sources