Results 141 to 150 of about 6,147 (181)

Chitinolytic activities in Bacillus thuringiensis and their synergistic effects on larvicidal activity

Journal of Applied Microbiology, 2002
To investigate the distribution of chitinase in Bacillus thuringiensis strains, and the enhancing effects of the chitinase-producing B. thuringiensis strains on insecticidal toxicity of active B. thuringiensis strain against Spodoptera exigua larvae.The chitinolytic activities of B.thuringiensis strains representing the 70 serotypes were investigated ...
M, Liu, Q X, Cai, H Z, Liu, B H, Zhang, J P, Yan, Z M, Yuan   +5 more
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Investigation of the larvicidal activity of Pothomorphe peltata and isolation of the active constituent

Phytotherapy Research, 2002
The insecticidal activity of the leaves of Pothomorphe peltata (Piperaceae) was evaluated on Aedes aegypti larvae. The active methanol extract was subjected to a bioactivity-directed fractionation, monitored by the larvicidal assay, and led to the isolation of a catechol derivative, 4-nerolidylcatechol.
E, Mongelli, J, Coussio, G, Ciccia
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Larvicidal activity of diflubenzuron in the tsetse fly

Nature, 1978
THE insecticides used in control operations against tsetse flies (Glossina spp.) have so far been almost exclusively organo-chlorine compounds, which kill the adult insect. Because of the possibility of the development of resistance to these compounds and as they may eventually become unavailable or unacceptable because of their persistence in the ...
A. M. JORDAN, M. A. TREWERN
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Toxocara canis: Larvicidal activity of fatty acid amides

Bioorganic & Medicinal Chemistry Letters, 2016
Considering the therapeutic potential of fatty acid amides, the present study aimed to evaluate their in vitro activity against Toxocara canis larvae and their cytotoxicity for the first time. Linoleylpyrrolidilamide was the most potent, with a minimal larvicidal concentration (MLC) of 0.05 mg/mL and 27% cytotoxicity against murine peritoneal ...
Taís, Mata-Santos, Caroline da Ros Montes, D'Oca, Hílton Antônio, Mata-Santos, Juliana, Fenalti, Nitza, Pinto, Tatiane, Coelho, Maria Elisabeth, Berne, Pedro Eduardo Almeida, da Silva, Marcelo Gonçalves Montes, D'Oca, Carlos James, Scaini   +9 more
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Solvatochromic behaviour and larvicidal activity of acridine-3-carboxylates

Journal of Photochemistry and Photobiology B: Biology, 2014
A new series of substituted ethyl 10-chloro-4-(3,4-dimethoxyphenyl)-2-hydroxy-12-phenyl-1,4,5,6-tetrahydrobenzo[a]acridine-3-carboxylates, 3a-e have been synthesized through NaOH base mediated cyclocondensation of (E)-7-chloro-2-(3,4-dimethoxybenzylidene)-9-phenyl-3,4-dihydroacridin-1(2H)-ones, 1a-e with ethyl acetoacetate.
A. Bharathi, Selvaraj Mohana Roopan, A. Abdul Rahuman, G. Rajakumar   +3 more
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Structure–activity relationship (SAR) modelling of mosquito larvicides

SAR and QSAR in Environmental Research, 2015
An attempt was made to derive structure-activity models allowing the prediction of the larvicidal activity of structurally diverse chemicals against mosquitoes. A database of 188 chemicals with their activity on Aedes aegypti larvae was constituted from analysis of original publications.
J, Devillers, A, Doucet-Panaye, J P, Doucet   +2 more
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Enzymatic activation of the Bacillus sphaericus mosquito larvicidal toxin

Journal of Invertebrate Pathology, 1987
Bacillus sphaericus insecticidal toxin was activated by trypsin, α-chymotrypsin, and mosquito gut homogenates to a form which was cytotoxic to cultured mosquito cells. Gut extracts from highly resistant Aedes aegypti larvae were as effective in activating this toxin as extracts from the highly sensitive species Culex quinquefasciatus.
E W, Davidson, A L, Bieber, M, Meyer, C, Shellabarger   +3 more
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Larvicidal activity of chimeric Bacillus thuringiensis protoxins

Molecular Microbiology, 1990
Summary Bacillus thuringiensis subspecies kurstaki (Btk) and subspecies berliner (Btb) both produce lepidopteran‐specific larvicidal protoxins with different activities against the same insect species. Toxic activity resides in the amino‐terminal half of both protoxins, whereas the carboxy‐terminal half of the molecules is not required for toxicity ...
K C, Raymond, T R, John, L A, Bulla
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The larvicidal activity of some 12,13-epoxytrichothec-9-enes

Biochemical Pharmacology, 1975
Abstract Seventeen naturally-occurring 12,13-epoxytrichothec-9-enes and 19 of their derivatives and transformation products have been tested for larvicidal activity against Aedes aegypti and the majority have been examined for toxicity to mammalian cells in tissue culture.
J F, Grove, M, Hosken
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Ovicidal, larvicidal and juvenilizing activity of a picolinephenoxyanilide againstCydia pomonella

Pest Management Science, 2000
N-(4-phenoxyphenyl)-2-pyridinecarboxamide (1) was synthesized from commercially available materials and its ovicidal and larvicidal activity against Cydia pomonella (L) was tested. The compound showed a LC 50 of 0.98 mg ml -1 when eggs less than 24h were sprayed using a Potter Tower, but it had no effect when eggs older than this were sprayed.
Ramon Canela, Mercè Balcells, Laura Dalmau, Jesús Avilla   +3 more
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