FURTHER OBSERVATIONS ON THE INTEGRATED CONTROL OF THE FRUITTREE LEAFROLLER (LEPIDOPTERA: TORTRICIDAE) IN BRITISH COLUMBIA

AbstractOverwintering eggs of the fruittree leafroller, Archips argyrospilus (Walker), began to hatch 13 April 1970, and larval emergence was completed by 8 May. Individual egg masses hatched in an average of 4.3 days, but the total time for larval emergence in all egg masses spanned a 25-day period. No egg parasites were observed. Winter mortality of egg masses was only 2%.A pink bud spray of diazinon gave good control of the fruittree leafroller and did not affect biological control of spider mites. Chlorphenamidine showed promise, but trees sprayed with this material developed a high population of the McDaniel spider mite, Tetranychus mcdanieli McGregor, during the summer. Phosalone and tetrachlorvinphos reduced the incidence of fruittree leafroller damage below that of the nonsprayed check but did not provide satisfactory control.

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Functional response of two Neoseiulus species preying on Tetranychus urticae Koch

Systematic and Applied Acarology ◽

10.11158/saa.22.7.13 ◽

2017 ◽

Vol 22 (7) ◽

pp. 1059 ◽

Cited By ~ 2

Author(s):

Yuan Zheng ◽

Patrick De Clercq ◽

Zi-Wei Song ◽

Dun-Song Li ◽

Bao-Xin Zhang

Keyword(s):

Biological Control ◽

Tetranychus Urticae ◽

Spider Mite ◽

Rate Coefficient ◽

Handling Time ◽

Spider Mites ◽

Functional Responses ◽

Combined Use ◽

Mite Infestations ◽

Tetranychus Urticae Koch

Neoseiulus californicus and N. cucumeris are both potential candidates for the biological control of key pests in China. Whereas N. californicus has mainly been used to control spider mites, N. cucumeris has been released for the control of thrips and spider mites. To understand the potential of the combined use of N. californicus and N. cucumeris to suppress outbreaks of Tetranychus urticae, the predatory performance of these Neoseiulus species against different stages of T. urticae, either separately or in combination, was evaluated by assessing their functional responses in the laboratory. The values of the attack rate coefficient (α) of N. californicus to each stage of T. urticae exceeded those of N. cucumeris, whereas the handling time (Th) of N. californicus was longer than that of N. cucumeris, except when attacking the larvae of T. urticae. Especially at the higher prey densities, N. cucumeris consumed more eggs per day than N. californicus, whereas N. californicus consumed more larvae. Both predators killed similar numbers of nymphs at each density when tested singly. The searching efficiency of the Neoseiulus species decreased with increasing prey densities, and for all stages of T. urticae, the searching efficiency of the Neoseiulus species tested singly was lower than when they were tested together. The study indicates the potential of mixed releases of N. californicus and N. cucumeris for the management of spider mite infestations.

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Effects of photoperiod on induction of diapause in Feltiella acarisuga (Diptera: Cecidomyiidae)

The Canadian Entomologist ◽

10.4039/ent13469-1 ◽

2002 ◽

Vol 134 (1) ◽

pp. 69-75 ◽

Cited By ~ 4

Author(s):

D.R. Gillespie ◽

D.M.J. Quiring

Keyword(s):

Biological Control ◽

British Columbia ◽

Biological Control Agent ◽

Gall Midge ◽

Growing Season ◽

Spider Mites ◽

Control Agent ◽

Leaf Surfaces ◽

Low Incidence ◽

Predatory Gall Midge

AbstractLarvae of the predatory gall midge Feltiella acarisuga (Vallot) diapaused as prepupae in tightly woven, brown, silk cells on leaf surfaces. Photoperiod alone, at day lengths from 16 to 8 h did not induce diapause at either 20 or 25 °C. A low incidence of diapause was induced by a combined photoperiod and thermoperiod of an 8-h day at 25 °C and a 16-h night at 15 °C. The incidence of diapause was higher under these conditions if the larvae were fed diapausing spider mites, Tetranychus urticae (Koch) (Acari: Tetranychidae). Because F. acarisuga only diapauses at daylengths equivalent to mid-winter, when its prey, T. urticae, is also in diapause, it can be used as a biological control agent for T. urticae in British Columbia greenhouses throughout most of the growing season.

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PEST MANAGEMENT: CONTROL OF ARCHIPS ARGYROSPILUS AND ARCHIPS ROSANUS (LEPIDOPTERA: TORTRICIDAE) ON APPLE

The Canadian Entomologist ◽

10.4039/ent109171-2 ◽

1977 ◽

Vol 109 (2) ◽

pp. 171-174 ◽

Cited By ~ 1

Author(s):

Harold F. Madsen ◽

S. A. Potter ◽

F. E. Peters

Keyword(s):

British Columbia ◽

Bacillus Thuringiensis ◽

Pest Management ◽

Management Control ◽

Field Observations ◽

Azinphos Methyl ◽

Larval Emergence ◽

Archips Argyrospilus

AbstractTwo leafroller spades are major pests of apple in British Columbia, Archips argyrospilus (Walker) and Archips rosanus (Linnaeus). Field observations showed that both species overwinter in the egg stage and that larval emergence times are similar. Experiments demonstrated that both species are susceptible to sprays of azinphos-methyl, diazinon, or trichlorfon applied at either the pink bud or petal fall stages. Dipel (Bacillus thuringiensis) failed to control larvae of either species.

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Stability and Resiliency of Biological Control of the Twospotted Spider Mite (Acari: Tetranychidae) in Hop

Environmental Entomology ◽

10.1093/ee/nvz071 ◽

2019 ◽

Vol 48 (4) ◽

pp. 894-902 ◽

Cited By ~ 2

Author(s):

A E Iskra ◽

J L Woods ◽

D H Gent

Keyword(s):

Biological Control ◽

Natural Enemies ◽

Nitrogen Fertilization ◽

Spider Mite ◽

Fertilization Rate ◽

Conservation Biological Control ◽

Spider Mites ◽

Economic Damage ◽

Twospotted Spider Mite ◽

Twospotted Spider

Abstract The twospotted spider mite (Tetranychus urticae Koch) is a common pest in agricultural and ornamental crops. This pest can be controlled by resident predatory arthropods in certain situations. This research quantified the stability and resiliency of established conservation biological control of the twospotted spider mite in hop over a 5-yr period associated with nitrogen fertilization rate and use of a broad-spectrum insecticide. Biological control generally was stable and resilient over a sixfold range of nitrogen fertilization rates, and in only 1 of 5 yr did elevated nitrogen rates significantly affect populations of spider mites. In contrast, one application of the insecticide bifenthrin was associated with disruption of biological control and a severe outbreak of spider mites. The complex of natural enemies suppressed the outbreak during the same year in which bifenthrin was applied, but only after populations of spider mites exceeded levels associated with economic damage. However, in the following year the system returned to an equilibrium state where spider mites were suppressed below economically damaging levels. Therefore, conservation biological control in hop appears stable and robust to factors such as nitrogen fertilization that increase reproductive rates of spider mites but may be sensitive to factors such as nonselective insecticides that are lethal to natural enemies. Conservation biological control can be considered resilient to a single use of a nonselective insecticide in the year following the application, but not within the year of application.

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Screening of Predatory Mites as Potential Control Agents of Pest Mites in Landscape Plant Nurseries of the Pacific Northwest

Journal of Environmental Horticulture ◽

10.24266/0738-2898-18.4.218 ◽

2000 ◽

Vol 18 (4) ◽

pp. 218-223

Author(s):

P.D. Pratt ◽

B.A. Croft

Keyword(s):

Biological Control ◽

Life History ◽

Pacific Northwest ◽

Spider Mite ◽

Life History Traits ◽

Predatory Mites ◽

Spider Mites ◽

Landscape Plant ◽

Landscape Plants ◽

The Pacific

Abstract To select a biological control agent for suppression of spider mites on landscape plants in western regions of the Pacific Northwest, we compared life history traits of Galendromus occidentalis Nesbitt, Neoseiulus californicus (McGregor) and Neoseiulus fallacis (Garman). We also evaluated abilities of these predatory mites to suppress spider mites in 4 landscape plant species under field conditions. Comparing life history traits from the literature, intrinsic rate of increase was similar between the 2 Neoseiulus species but lower for G. occidentalis. Prey killed per day was greatest for G. occidentalis > N. fallacis > N. californicus. For overwintering abilities, N. fallacis and G. occidentalis are indigenous to the Pacific Northwest and will survive winter assuming overwintering sites are available, but survival of N. californicus is unlikely. Neoseiulus californicus has the widest prey range, G. occidentalis the narrowest, with N. fallacis intermediate. When inoculated into spider mite infested landscape plants, N. fallacis was equally effective at suppressing spider mites as G. occidentalis in either Malus rootstock or Acer shade trees. Further tests with N. fallacis or N. californicus on Spiraea and Rhododendron plants suggested that N. fallacis is equally or more effective at suppressing pest mites, respectively. Compared with the other candidates, N. fallacis was equally effective at controlling pest mites and has a wider prey range than G. occidentalis. Neoseiulus fallacis appears to be the best candidate for biological control of multiple spider mite species on landscape plants in these parts of the Pacific Northwest.

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AN UNUSUALLY COPIOUS PRODUCTION OF WEBBING BY A WILLOW-INHABITING SPIDER MITE, SCHIZOTETRANYCHUS SCHIZOPUS (ZACHER)

The Canadian Entomologist ◽

10.4039/ent1211037-12 ◽

1989 ◽

Vol 121 (12) ◽

pp. 1037-1039 ◽

Cited By ~ 1

Author(s):

Robert Duncan ◽

Evert E. Lindquist

Keyword(s):

British Columbia ◽

Spider Mite ◽

Hot Springs ◽

Spider Mites ◽

Natural Conditions ◽

Willow Trees

AbstractMassive quantities of webbing and overwintering eggs produced by Schizotetranychus schizopus (Zacher), covering the trunks of two willow trees growing near Radium Hot Springs, British Columbia, are reported. This was the most extensive concentration of overwintering eggs and webbing, produced by spider mites under natural conditions, known to the authors.

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Evaluation of acaricides against false spider mite, Tenuipalpus aboharensis (Acari: Tenuipalpidae), a pest of pomegranate

ENTOMON ◽

10.33307/entomon.v45i1.507 ◽

2020 ◽

Vol 45 (1) ◽

pp. 81-86

Author(s):

Mohammad Yosof Amini ◽

Ahamad Shah Mohammadi ◽

Srinivasa N ◽

Onkarappa S

Keyword(s):

Field Experiment ◽

Spider Mite ◽

Spider Mites ◽

Economic Losses ◽

Fruit Crops ◽

False Spider Mites ◽

False Spider ◽

False Spider Mite

False spider mites are serious pests of pomegranate and frequently cause considerable economic losses in other fruit crops as well. A field experiment conducted to evaluate eleven acaricides against Tenuipalpus aboharensis infesting pomegranate plants, revealed that wettable sulphur at 2.5 g and dicofol at 2.5 ml per litre were very effective and other acaricides viz. propargite, fenpyroximate, chlorfenapyr and buprofezin were also found effective against T. aboharensis.

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