Studies of the Efficacy of Natural Enemies of Citrus Red Mite in Southern California1

DeBach, Paul; Fleschner, C. A.; Dietrick, E. J.

doi:10.1093/jee/43.6.807

Cited by 19 publications

(13 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…tularensis during the autumn remained near 0 despite relatively high CI{M densities. Our results, in conjunction with those of other workers (DeBach et al, 1950 ;Flesehnet, 1958 ;McMurtry, 1969), lead us to conclude that S. pkipes is the most important predator of CRM in southern California citrus, especially during the autumn season, when mite densities are potentially the most damaging ; that S. picipes exhibits a numerical (aggregative) response to increasing CRM densities ; that S. picipes can successfully locate relatively small, isolated CRM colonies ; and that I. humilis appears to interfere with the ability of S. picipes to control CRM.…”

Section: Discussionsupporting

confidence: 93%

See 1 more Smart Citation

Increases in densities of the citrus red mite,Panonychus citri [Acarina: Tetranychidae], in association with the Argentine ant,Iridomyrmex humilis [Hymenoptera: Formicidae], in southern California citrus

1987

View full text Add to dashboard Cite

We monitored the activities of theArgentine ant, Iridomyrmex humilis (Mayr), in 3 citrus orchards during 1984 and 1985. We also monitored densities of citrus red mite, Panonychus citri (McGregor), the adult spider mite destroyer, Stethorus picipes Casey [Col. : Coccinellidae], and the predatory mite, Euseius tularensis Congdon [Acarina : Phytoseiidae] during the same period in ant-present and ant-free plots in each orchard.L humilis was excluded for at least 9 months from trees pruned 60 cm from the ground following a basal application of 1 or 2 % chlorpyrifos 4 EC. Autumn densities of P. citri in these ant-free plots were significantly lower than those in the plots infested with L humilis.S. picipes appeared to be the most important predator, maintaining low P. cirri densities on citrus in southern California in the absence of/. humilis activity. S" picipes densities increased numerically in response to the early spring and late autumn increases in the density of P. citri populations. However, in the presence ofL humilis activity, effective predation was apparently inhibited.Densities of E. tularensis were unaffected by the presence of/. humilis, nor did E. tularensis respond to spring or autumn increases in the density of P. citri populations in any of the orchards.

show abstract

Section: Discussionsupporting

confidence: 93%

“…1). S. picipes is an obligate tetranychid predator of CRM in southern California citrus orchards (DeBach et al, 1950 ;Fleschner, 1958 ;McMurtry, 1969).…”

Section: Discussionmentioning

confidence: 99%

Increases in densities of the citrus red mite,Panonychus citri [Acarina: Tetranychidae], in association with the Argentine ant,Iridomyrmex humilis [Hymenoptera: Formicidae], in southern California citrus

1987

View full text Add to dashboard Cite

show abstract

“…The observational approach involves studying fluctuations in the population numbers of one species and the attempted assessment as to whether these changes are coincident with, and ascribable to, changes in the population of another species. Important studies have been carried out by DeBach et al (1950) on predators of the citrus red mite, Panonychus citri (McGregor) (cited by the authors as Paratetranychus citri), and by Richards & Waloff (1961) on the predators of the broom beetle, Gonioctena olivacea (Forster) (cited by the authors as Phytodecta olivacea).…”

mentioning

confidence: 99%

“…The experimental approach involves paired comparisons of plots in which the predator-prey ratio has been modified in some way in one of the plots. Examples of this are: mechanical exclusion (Smith & DeBach, 1942;Franz, 1958;Way & Banks, 1958), use of insecticides (DeBach, 1946(DeBach, , 1955DeBach et al, 1950;Fleschner, 1958;Kiritani et al, 1971) and hand removal (Fleschner, 1958;Way & Banks, 1958;Pollard, 1969).…”

mentioning

confidence: 99%

The use of serology in evaluating invertebrate prey-predator relationships : a review

Boreham

Ohiagu

1978

Bull. Entomol. Res.

View full text Add to dashboard Cite

Several methods, including the use of seralogy, are available for evaluating prey-predator relationships. Two basic methods involving precipitation and agglutination reactions have been utilised, both of which depend on the production of specific antisera with high titres. A critical account is presented of methods of preparing an'tisera, with particular reference to the amount of antigen required, the route of inoculation and testing antisera, together with a review of the five precipitation and two agglutination techniques available. The main limitations of A 1 7 2 p -F -L -BOREHAM and C. E. OHIAGU serological methods are the specificity of the arttisera and the difficulties in quantifying results unless assumptions are made as to the number of prey eaten at each feed. Details of studies employing serological techniques to identify the predators of specific prey and the food of invertebrates are given in two tables. The value of serological techniques is discussed in relation to the ecology of invertebrates by considering, as examples, the insect fauna on broom (Sarothamnus scoparius), predation of mosquitoes and the food of triclads. Errors in the quantification of predation may occur by including positive reactions resulting from carrion feeding or material ingested accidentally on plants by phytophagous arthropods.

show abstract

“…Where some ant species are present their action in repelling predators has provided a useful, although limited, technique (review by Way, 1963). Several workers have used insecticides to eliminate natural enemies (Debach, Fleschner & Dietrick, 1950;Huffaker & Kennett, 1956;Wright, Hughes & Worrall, 1960), but the effects of applying an insecticide to an ecosystem are likely to be complex and it is not easy to separate the effects of the various parts of the predator fauna.…”

mentioning

confidence: 99%

THE EFFECT OF REMOVAL OF ARTHROPOD PREDATORS ON AN INFESTATION OF BREVICORYNE BRASSICAE (HEMIPTERA, APHIDIDAE) ON BRUSSELS SPROUTS

Pollard¹

1969

Entomologia Exp Applicata

View full text Add to dashboard Cite

An experiment on the effect of predator removal and exclusion on Brevicoryne brassicae on Brussels sprouts is described. Five treatments were used to evaluate the effect of different parts of the predator fauna. Two syrphid species were responsible for a rapid decline in aphid numbers at the beginning of the experimental period. In two treatments where syrphids were removed a cecidomyid predator responded to the larger numbers of aphids and, in the treatment in which they were not removed, completely eliminated the aphids. In the treatment in which all predators were removed aphid numbers remained relatively high until the end of the season. ZUSAMMENFASSUNG DIE WIRKUNG DER AUSSCHALTUNG RÄUBERISCHER ARTHROPODEN AUF EINEN BEFALL MIT BREVICORYNE BRASSICAE (HEMIPTERA, APHIDIDAE) AN ROSENKOHL Es wird ein Versuch über die Wirkung der Entfernung und des Ausschlusses räuberischer Arthropoden von Brevicoryne brassicae an Rosenkohl beschrieben. Es kamen fünf Verfahren zur Bewertung des Wirkungsgrades der verschiedenen Glieder der Räuberfauna zur Anwendung. Entfernung der allgemeinen Räuber und Ausschluß der Bodenfauna mit Hilfe von Klebstreifen rings um die Pflanzenstengel hatten nachweislich keinen Einfluß auf die Blattlauszahl. Zwei Syrphiden‐Arten, Syrphus balteatus und Sphaerophoria scripta, waren für einen raschen Rückgang der Blattlauszahlen zu Beginn des Untersuchungszeitraumes verantwortlich. In zwei Verfahren, bei denen die Schwebfliegen entfernt worden waren, reagierte eine Aphidoletes‐Art (Cecidomyiidae) auf die größeren Zahlen der Blattläuse und in einem Versuch, in dem Aphidoletes nicht entfernt wurde, rottete sie die Aphiden völlig aus. In Versuchen, bei denen alle Räuber ausgeschaltet wurden, blieben die Blattlauszahlen bis zum Ende der Saison relativ hoch.

show abstract

Studies of the Efficacy of Natural Enemies of Citrus Red Mite in Southern California1

Cited by 19 publications

References 0 publications

Increases in densities of the citrus red mite,Panonychus citri [Acarina: Tetranychidae], in association with the Argentine ant,Iridomyrmex humilis [Hymenoptera: Formicidae], in southern California citrus

Increases in densities of the citrus red mite,Panonychus citri [Acarina: Tetranychidae], in association with the Argentine ant,Iridomyrmex humilis [Hymenoptera: Formicidae], in southern California citrus

The use of serology in evaluating invertebrate prey-predator relationships : a review

THE EFFECT OF REMOVAL OF ARTHROPOD PREDATORS ON AN INFESTATION OF BREVICORYNE BRASSICAE (HEMIPTERA, APHIDIDAE) ON BRUSSELS SPROUTS

Contact Info

Product

Resources

About