Journal ArticleDOI
A method of computing the effectiveness of an insecticide
TLDR
In order to make experimental studies comparable and statistically meaningful, the article recommends the following formula: per cent control = 100(X - Y)/X, which eliminates errors due to deaths in the control sample which were not due to the insecticide.Abstract:
There are several statistical methods used in biology (entomology) for computing the effectiveness of an insecticide, based on relating the number of dead insects in the treated plat to the number of live ones in the untreated plat. In order to make experimental studies comparable and statistically meaningful, the article recommends the following formula: per cent control = 100(X - Y)/X, where X = % living in the untreated check sample and Y = % living in the treated sample. Calculation using this method eliminates errors due to deaths in the control sample which were not due to the insecticide. An example based on treatments of San Jose scale includes computation of probable errors for X and Y, and the significance of the difference between the two counts. Common biometric convention holds that when the difference between the results of two experiments is greater than three times its probable error, the results are significant and due to the treatment applied.read more
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A Correlation and Path Coefficient Analysis for Some Yield Components in Bread Wheat
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Synthesis and characterization of silver nanoparticles using Bacillus amyloliquefaciens and Bacillus subtilis to control filarial vector Culex pipiens pallens and its antimicrobial activity
TL;DR: Bacteria-mediated silver nanoparticles have a rapid effect on vector mosquito and microbial pathogen suggesting savings of energy and resources, and bacteria-AgNPs may be used in the future as an effective weapon to control vector mosquitoes and harmful bacteria.
Journal ArticleDOI
The crop-residue of fiber hemp cv Futura 75: from a waste product to a source of botanical insecticides
Giovanni Benelli,Giovanni Benelli,Roman Pavela,Giulio Lupidi,Massimo Nabissi,Riccardo Petrelli,Stephane L. Ngahang Kamte,Loredana Cappellacci,Dennis Fiorini,Stefania Sut,Stefano Dall'Acqua,Filippo Maggi +11 more
TL;DR: The hemp essential oil moderately inhibited the acetylcholinesterase (AChE), which is a target enzyme in pesticide science, and shed light on the future application of fiber hemp crop-residue for the development of effective, eco-friendly and sustainable insecticides.
Journal ArticleDOI
Differential Sensitivity of Mosquito Taxa to Vegetable Tannins
TL;DR: Comparison of the rank order of sensitivity among taxa with the associated levels of cytochrome P-450, esterase, and glutathione-S-transferase activities suggests that cyto Chrome P- 450 and esterases may be involved in the detoxification of tannins.
Journal ArticleDOI
Direct and admixture toxicity of diatomaceous earth and monoterpenoids against the storage pests Callosobruchusmaculatus (F.) and Sitophilus oryzae (L.)
Md. Saiful Islam,Md. Mahbub Hasan,Chaoliang Lei,Tanja Mucha-Pelzer,Inga Mewis,Christian Ulrichs +5 more
TL;DR: It is indicated that the natural product DE has great potential to replace synthetic pesticides commonly used in stored product pest management and can be improved by adding certain monoterpenoids against certain insect pests.