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
Citations
More filters
Journal ArticleDOI
Bio-efficacy evaluation of nanoformulations of β-cyfluthrin against Callosobruchus maculatus (Coleoptera: Bruchidae)
TL;DR: The results suggest that depending upon the polymer matrix used, the application rate of β-cyfluthrin can be optimized to achieve insect control at the desired level and period.
Journal ArticleDOI
Toxicity and sublethal effects of seven insecticides to eggs of the flower bug Orius insidiosus (Say) (Hemiptera: Anthocoridae).
Valéria Fonseca Moscardini,Pablo C. Gontijo,Geraldo Andrade Carvalho,Rodrigo Lopes de Oliveira,Jader Braga Maia,Fernanda Fonseca e Silva +5 more
TL;DR: This study assessed the lethal and sublethal effects of insecticides on this species through life table, and classified the insecticides according to the definitions of toxicity given by the International Organization for Biological and Integrated Control of Noxious Animals and Plants.
Journal ArticleDOI
Influence of the agrochemicals used for rice and vegetable cultivation on insecticide resistance in malaria vectors in southern Côte d'Ivoire.
Mouhamadou Chouaibou,Behi K. Fodjo,Gilbert Fokou,Ouattara Allassane,Benjamin G. Koudou,Jean-Philippe David,Christophe Antonio-Nkondjio,Hilary Ranson,Bassirou Bonfoh +8 more
TL;DR: The study describes the use of insecticides and herbicides on crops and highlights the importance of considering agriculture practices when attempting to manage resistance in malaria vectors.
Journal ArticleDOI
Susceptibility of Adult Mosquitoes to Insecticides in Aqueous Sucrose Baits
TL;DR: Several pesticides from different classes of compounds have potential for use in development of toxic baits for mosquitoes, and Sucrose as a phagostimulant significantly enhanced mortality to toxicants.
Journal ArticleDOI
Biological Control Agents for White Grubs (Coleoptera: Scarabaeidae) in Anticipation of the Establishment of the Japanese Beetle in California
TL;DR: Biological control agents for the control of 3rd-instar scarab turfgrass pests, both for the masked chafer Cyclocephala hirta LeConte and the Japanese beetle, Popillia japonica Newman, deserve further examination as an alternative to chemical white grub control especially as a highly compatible component of sustainable turfgrass management.