Variation Between Samples of Fruit, and of Fruit Damages Mainly from Insect Pests, on Apple in Quebec

LeRoux, E. J.

doi:10.4039/ent93680-8

Cited by 9 publications

(4 citation statements)

References 2 publications

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“…If one raises this option the number of trees would be more realistic. This is in agreement with LeRoux (1961), who stated that 10% standard error could be used for intensive studies and that 20% standard error could be used for less intensive studies. Due to the lack of knowledge concerning the damage caused by various population levels of pecan weevils, it is difficult to determine the degree of precision required for sampling this pest.…”

Section: Estimation Of the Number Of Trees To Be Sampledsupporting

confidence: 91%

PECAN WEEVIL, CURCULIO CARYAE (COLEOPTERA: CURCULIONIDAE): 1. COMPARISON OF ADULT SAMPLING TECHNIQUES

et al. 1976

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Can. Ent. 108: 1097-1 11 1 (1976) Over 95% of feeding balsam woolly aphids occur in crevices on balsam fir branches and the highest density occurs within the 3-year tip of branches. The crevices occur under the bud scales at nodes, the base of each season's growth, and among staminate flower buds or among and within flower bracts. The abundance and survival of aphids as well as mortality factors vary with the location of the nodes in a branch, the type of branch, and aphid generation. The significant differences show that there are 9 to 13 strata within the 3-year tip of a branch. For ecological studies and measuring population levels, the cluster of aphids within a defined crevice, for example under the bud scale at the base of a cluster of shoots, can be selected as a sample unit. ResumeLe'puceron lanigkre du sapin, Adelges piceae (Ratz.) un insecte nuisible au sapin baumier, Abies balsamea (L.) Mill., se trouve a 95%, au moins, dans les crevasses des branches, c'est-i-dire sous les ecailles de bourgeon a la base de la pousse annuelle et parmi les bourgeons des fleurs staminies, ou parmi et dans les fleurs stamintes. L'abondance et la survie des pucerons, outre la mortaliti, varient selon I'endroit des crevasses sur la branche, les types des branches, et les generations de printemps et ett du puceron. Dans un bout de branche de trois ans, il y a des diffirences significatives entre le nombre et la mortaliti des pucerons et entre les facteurs de mortalite. Par consequent, on doit faire jusqu'a 13 couches (strates) dans I'extremite de trois ans d'une branche pour tenir compte de la variation biologique et statistique. Pour les fins d'ttudes tcologiques et d'tchantillonnage, on peut designer les pucerons en dedans d'une crevasse spicifique, par exemple sous les tcailles a la base des pousses terminales, comme une unite d'Cchantillonnage.

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Section: Estimation Of the Number Of Trees To Be Sampledsupporting

confidence: 91%

PECAN WEEVIL, CURCULIO CARYAE (COLEOPTERA: CURCULIONIDAE): 1. COMPARISON OF ADULT SAMPLING TECHNIQUES

et al. 1976

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“…Observations made on the relationship existing between the number of samples needed for a given precision and population densities of the species studied by LeRoux and Reimer (1959), LeRoux (1961), and Hudon and LeRoux (1961) are applic2ble here since populations of A. argyrospilus are generally of the negative binomial type distribution.…”

Section: Sampling Considerationsmentioning

confidence: 99%

A Sampling Technique for Population and Mortality Factors of the Fruit-Tree Leaf Roller, Archips argyrospilus (Wlk.) (Lepidoptera: Tortricidae), on Apple in Quebec

Paradis¹,

LeRoux²

1962

Can Entomol

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Sampling techniques for population^ and mortality factors of cl~e fruit-tree leaf roller, Archips argyrospilus (Wlk.), on apple in Quebec, were developed at Rougemont from 1958 to 1960 with the object of obtaining reliable statistics for life tables on this species. Biometric teclltliques have not previously been applied for ecological studies of A. argyrospilzts, most workers having been primarily concerned with life history, chemical control, and general observations on natural control factors (Gill

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“…Components of variance were used to determine the appropriate sampling procedure (see, e.g., LeRoux and Reimer, 1959;LeRoux, 1961). Estimates of inter-sample error variance (S2) were obtained from the mean square for samples within blocks (i.e., MSS = 480.1; Table I), and are listed in Table IV for stages that would ordinarily be sampled for 0. nubilalis.…”

Section: Sampling Considerationsmentioning

confidence: 99%

Variation Between Samples of Immature Stages, and of Mortalities from Some Factors, of the European Corn Borer, Ostrinia nubilalis (Hübner) (Lepidoptera: Pyralidae), on Sweet Corn in Quebec

Hudon¹,

LeRoux²

1961

Can Entomol

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This is a report on a program to sample the European corn borer, Ostrinia nubilalis (Hbn.), with the object of obtaining reliable statistics for life tables (see e.g. Morris, 1955; LeRoux and Reimer, 1959).Basic studies on factors determining abundance of the European corn borer are few, some of the most notable having been carried out by Barber (1926), Huber et al. (1928), Thompson and Parker (1928), Stirrett (1938), Vance (1943), Baker et al. (1949), Bigger and Petty (1953), Everett et al. (1958) and Chiang and Hodson (1959). None of these studies was a thorough study of mortality factors in development of the European corn borer from endemic to epidemic levels. A number of specific factors known to be important in the epidemiology of this species have been investigated by Arbuthnot (1949), Neiswander (1952), Goleman (1954), Chiang and Holdaway (1955), and Chiang (1959), and the application of biometric techniques to the sampling of corn borer populations has been studied by Beard (1943), McGuire (1954), and Bankcroft and Brindley (1956). None of the latter authors have, however, investigated sampling techniques relating to the development of life tables for this species.

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Variation Between Samples of Fruit, and of Fruit Damages Mainly from Insect Pests, on Apple in Quebec

Cited by 9 publications

References 2 publications

PECAN WEEVIL, CURCULIO CARYAE (COLEOPTERA: CURCULIONIDAE): 1. COMPARISON OF ADULT SAMPLING TECHNIQUES

PECAN WEEVIL, CURCULIO CARYAE (COLEOPTERA: CURCULIONIDAE): 1. COMPARISON OF ADULT SAMPLING TECHNIQUES

A Sampling Technique for Population and Mortality Factors of the Fruit-Tree Leaf Roller, Archips argyrospilus (Wlk.) (Lepidoptera: Tortricidae), on Apple in Quebec

Variation Between Samples of Immature Stages, and of Mortalities from Some Factors, of the European Corn Borer, Ostrinia nubilalis (Hübner) (Lepidoptera: Pyralidae), on Sweet Corn in Quebec

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