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JournalISSN: 0022-0493

Journal of Economic Entomology 

Oxford University Press
About: Journal of Economic Entomology is an academic journal published by Oxford University Press. The journal publishes majorly in the area(s): Population & Aphid. It has an ISSN identifier of 0022-0493. Over the lifetime, 27158 publications have been published receiving 454838 citations.
Topics: Population, Aphid, Weevil, Tephritidae, Aphididae


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Journal ArticleDOI
TL;DR: 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.

11,700 citations

Journal ArticleDOI
TL;DR: The principles involved in controlling insects by releasing sexually sterile males among the existing natural population will be described and the potentialities as well as the limitations of the method will be discussed.
Abstract: The purpose of this paper is to consider the possibility of controlling insects by releasing sexually sterile males among the existing natural population. The principles involved will be described and the potentialities as well as the limitations of the method as we know them at present, will be discussed.

1,181 citations

Journal ArticleDOI
TL;DR: A simple artificial medium has been developed and handling procedures have been devised to facilitate the mass-rearing of a variety of noctuid species with a minimum of time and money.
Abstract: A simple artificial medium has been developed and handling procedures have been devised to facilitate the mass-rearing of a variety of noctuid species with a minimum expenditure of time and money. The medium, composed of dry beans, yeast, ascorbic acid, agar, water, and 3 mold inhibitors, satisfactorily supports the development of larvae of the cabbage looper, Trichoplusia ni (Hubner) ; the alfalfa looper, Autographa californica (Speyer); the yellow-striped armyworm, Prodenia ornithogalli Guenee; the beet armyworm, Spodoptera exigua (Hubner) ; the bollworm, Heliothis zea (Bocklie) ; the tobacco budworm, H. virescens (F.); H. phloxiphaga G. & R.; the armyworm, Pseudaletia unipuncta (Haworth); and the variegated cutworm, Peridroma saucia (Hubner). Details are given concerning the development, viability, and fecundity of laboratory-reaied individuals of the first 6 of these species.

1,008 citations

Journal ArticleDOI
TL;DR: The SAS program presented here allows the calculation of confidence intervals for all estimated parameters, as well as provides one-sided and two-sided t-tests to perform pairwise or multiple comparison between groups, with their respective P values.
Abstract: Knowledge of population growth potential is crucial for studying population dynamics and for establishing management tactics for pest control. Estimation of population growth can be achieved with fertility life tables because they synthesize data on reproduction and mortality of a population. The five main parameters associated with a fertility life table are as follows: (1) the net reproductive rate (Ro), (2) the intrinsic rate of increase (rm), 3) the mean generation time (T), (4) the doubling time (Dt), and (5) the finite rate of increase (lambda). Jackknife and bootstrap techniques are used to calculate the variance of the rm estimate, which can be extended to the other parameters of life tables. Those methods are computer-intensive, their application requires the development of efficient algorithms, and their implementation is based on a programming language that encompasses quickness and reliability. The objectives of this article are to discuss statistical and computational aspects related to estimation of life table parameters and to present a SAS program that uses jackknife to estimate parameters for fertility life tables. The SAS program presented here allows the calculation of confidence intervals for all estimated parameters, as well as provides one-sided and two-sided t-tests to perform pairwise or multiple comparison between groups, with their respective P values.

780 citations

Performance
Metrics
No. of papers from the Journal in previous years
YearPapers
2023153
2022299
2021300
2020312
2019415
2018380