Improving Insecticide Activity and Rain-Fastness with Polyethylenimine

2009 ◽  
pp. 288-288-9
Author(s):  
HN Feigenbaum
Keyword(s):  
Insecticide Activity

Fungicide and insecticide activity of Justicia procumbens extracts

2013 ◽  
Vol 21 (2) ◽  
pp. 212
Author(s):  
MingCheng GUO ◽  
BaoTong LI ◽  
LiMei TANG ◽  
XinLiang PING ◽  
XiaoHua LI ◽  
...  
Keyword(s):  
Insecticide Activity

Syntheses, spectral properties and pesticide activity of O-ethyl-S-propyl-O-(1-alkyl, phenyl-5-chloro, alkoxy-6-oxo-1H-pyridazine-4-yl)esters of dithiophosphoric acid

1980 ◽  
Vol 45 (8) ◽  
pp. 2247-2253 ◽  
Author(s):  
Václav Konečný ◽  
Štefan Varkonda ◽  
Vojtech Kubala
Keyword(s):  
Spectral Properties ◽  
Uv Spectra ◽  
Dithiophosphoric Acid ◽  
Insecticide Activity ◽  
Ir And Uv Spectra

Syntheses of O-ethyl-S-propyl-O-(1-alkyl, phenyl-5-chloro, alkoxy-6-oxo-1H-pyridazine-4-yl) esters of dithiophosphoric acid are described. The compounds were investigated for their IR and UV spectra and for their contact and system activities as insecticides, acaricides, ovicides, fungicides and herbicides. Some of the compounds proved efficient acaricides; compound VIII also had an insecticide activity.

Insecticide activity and toxicity of essential oils against two stored-product insects

2021 ◽  
Vol 144 ◽  
pp. 105575
Author(s):  
Rubens Candido Zimmermann ◽  
Caio Elias de Carvalho Aragão ◽  
Pedro José Pereira de Araújo ◽  
Alessandra Benatto ◽  
Amanda Chaaban ◽  
...  
Keyword(s):  
Essential Oils ◽  
Stored Product Insects ◽  
Insecticide Activity

Introduction to Bioproducts and Bioseparations

2015 ◽  
Author(s):  
Roger G. Harrison ◽  
Paul W. Todd ◽  
Scott R. Rudge ◽  
Demetri P. Petrides
Keyword(s):  
Ex Vivo ◽  
Blood Clot ◽  
Chemical Properties ◽  
Downstream Processing ◽  
Added Value ◽  
Chemical Substances ◽  
Whole Cells ◽  
Living Things ◽  
Insecticide Activity

Bioproducts—chemical substances or combinations of chemical substances that are made by living things—range from methanol to whole cells. They are derived by extraction from whole plants and animals or by synthesis in bioreactors containing cells or enzymes. Bioproducts are sold for their chemical activity: methanol for solvent activity, ethanol for its neurological activity or as a fuel, penicillin for its antibacterial activity, taxol for its anticancer activity, streptokinase (an enzyme) for its blood clot dissolving activity, hexose isomerase for its sugar-converting activity, and whole Bacillus thuringiensis cells for their insecticide activity, to name a few very different examples. The wide variety represented by this tiny list makes it clear that bioseparations must encompass a correspondingly wide variety of methods. The choice of separation method depends on the nature of the product, remembering that purity, yield, and activity are the goals, and the most important of these is activity. This first chapter therefore reviews the chemical properties of bioproducts with themes and examples chosen to heighten awareness of those properties that must be recognized in the selection of downstream processes that result in acceptably high final purity while preserving activity. The final part of this chapter is an introduction to the field of bioseparations, which includes a discussion of the stages of downstream processing, the basic principles of engineering analysis as applied to bioseparations, and the various factors involved in developing a bioproduct for the marketplace. The pharmaceutical, agrichemical, and biotechnology bioproduct industries account for many billion dollars in annual sales—neglecting, of course, commodity foods and beverages. By “bioproduct” we mean chemical substances that are produced in or by a biological process, either in vivo or ex vivo (inside or outside a living organism). Figure 1.1 indicates a clear inverse relationship between bioproduct market size and cost. Owing to intense competition, cost, price, and value are very closely related, except in the case of completely new products that are thoroughly protected by patents, difficult to copy, and of added value to the end user.

scholarly journals Insecticidal Activity of Bacteria from Larvae Breeding Site with Natural Larvae Mortality: Screening of Separated Supernatant and Pellet Fractions

Pathogens ◽  
2020 ◽  
Vol 9 (6) ◽  
pp. 486 ◽  
Author(s):  
Handi Dahmana ◽  
Didier Raoult ◽  
Florence Fenollar ◽  
Oleg Mediannikov
Keyword(s):  
Biological Control ◽  
Insecticidal Activity ◽  
Breeding Site ◽  
Bacterial Strains ◽  
Activity Prediction ◽  
Pcr Screening ◽  
Breeding Sites ◽  
Insecticide Activity ◽  
New Compounds

Mosquitoes can transmit to humans devastating and deadly pathogens. As many chemical insecticides are banned due to environmental side effects or are of reduced efficacy due to resistance, biological control, including the use of bacterial strains with insecticidal activity, is of increasing interest and importance. The urgent actual need relies on the discovery of new compounds, preferably of a biological nature. Here, we explored the phenomenon of natural larvae mortality in larval breeding sites to identify potential novel compounds that may be used in biological control. From there, we isolated 14 bacterial strains of the phylum Firmicutes, most of the order Bacillales. Cultures were carried out under controlled conditions and were separated on supernatant and pellet fractions. The two fractions and a 1:1 mixture of the two fractions were tested on L3 and early L4 Aedes albopictus. Two concentrations were tested (2 and 6 mg/L). Larvae mortality was recorded at 24, 48 and 72 h and compared to that induced by the commercialized B. thuringiensis subsp. israelensis. Of the 14 strains isolated, 11 were active against the A. albopictus larvae: 10 of the supernatant fractions and one pellet fraction, and mortality increased with the concentration. For the insecticide activity prediction in three strains of the Bacillus cereus complex, PCR screening of the crystal (Cry) and cytolytic (Cyt) protein families characteristic to B. thuringiensis subsp. israelensis was performed. Most of the genes coding for these proteins’ synthesis were not detected. We identified bacterial strains that exhibit higher insecticidal activity compared with a commercial product. Further studies are needed for the characterization of active compounds.

Insecticide Activity and Structure, Insecticidal Properties of Some Diethyl Nitronaphthyl Phosphates

1964 ◽  
Vol 12 (3) ◽  
pp. 228-231 ◽  
Author(s):  
T. R. Fukuto ◽  
R. L. Metcalf ◽  
Mary Frederickson ◽  
M. Y. Winton
Keyword(s):  
Insecticide Activity
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