Developing an Ecotoxicological Testing Standard for Predatory Mites in Australia: Acute and Sublethal Effects of Fungicides on Euseius victoriensis and Galendromus occidentalis (Acarina: Phytoseiidae)

2004 ◽  
Vol 97 (3) ◽  
pp. 891-899 ◽  
Author(s):  
Martina B. Bernard ◽  
Paul A. Horne ◽  
Ary A. Hoffmann
Keyword(s):  
Sublethal Effects ◽  
Predatory Mites ◽  
Galendromus Occidentalis

Impact of Predatory Mite Releases on the Abundance of Pecan Leaf Scorch Mite (Acari: Tetranychidae)

2007 ◽  
Vol 42 (4) ◽  
pp. 517-524 ◽  
Author(s):  
James D. Dutcher
Keyword(s):  
Population Density ◽  
Predatory Mites ◽  
Predatory Mite ◽  
Mite Infestation ◽  
Effective Management ◽  
High Population Density ◽  
Release Date ◽  
Leaf Scorch ◽  
Galendromus Occidentalis ◽  
Release Area

Release of the predatory mites, Galendromus occidentalis (Nesbitt) and Phytoseuilis persimilis Athias-Henriot, suppressed or controlled populations of pecan leaf scorch mite (Eotetranychus hicoriae McGregor [Acari:Tetranychidae]) in an 18-yr-old ‘Desirable’ pecan orchard. Predators controlled a low population (4.4 pecan leaf scorch mites and eggs per leaf in untreated trees) of pecan leaf scorch mites in the 2002 season at 28 days after the release date. In 2003, both species of predatory mites were released at 500 and 1000 mites per tree in the center tree of a 25-tree, square plot (0.41 ha). Untreated trees had 63, 240, and 38 pecan leaf scorch mites and eggs per leaf at 6, 10, and 24 d postrelease, respectively. Pecan leaf scorch mites were controlled at this high population density in the release area 24 d after the release. Release of the mites at 500 and 1000 G. occidentalis mites per tree reduced the pecan leaf scorch mite infestation by 67 and 91%, respectively. Release of 500 and 1000 P. persimilis mites per tree reduced the pecan leaf scorch mite infestation by 90 and 98%, respectively. Predatory mite releases appear to provide an effective management tactic for pecan leaf scorch mite for pecan producers in Georgia.

scholarly journals Surveys of 12 California crops for phytoseiid predatory mites show changes compared to earlier studies

2020 ◽  
Vol 74 (3) ◽  
pp. 129-137 ◽  
Author(s):  
Elizabeth E. Grafton-Cardwell ◽  
Walter Bentley ◽  
Mary Bianchi ◽  
Frances E. Cave ◽  
Rachel Elkins ◽  
...  
Keyword(s):  
Dominant Species ◽  
Geographical Location ◽  
Predatory Mites ◽  
Predatory Mite ◽  
Agricultural Crops ◽  
Phytoseiid Mites ◽  
Economic Thresholds ◽  
Galendromus Occidentalis ◽  
Major Species ◽  
Geographical Regions

Phytoseiid mites are key predators in agricultural crops. However, not all species regulate pest populations below economic thresholds, and therefore knowledge of which species are associated with particular crops aids pest control recommendations. Surveys of 12 crops across six geographical regions of California demonstrated that phytoseiid species varied by crop and geographical location, with subtropical crops exhibiting the lowest species diversity and grape the greatest. The western predatory mite, Galendromus occidentalis, long cited as a dominant species in California crops, was not found to be the major species in most situations. Euseius stipulatus, a species introduced in the 1970s, was found in the surveyed crops in many areas of the state and appears to be displacing E. hibisci along the south coast.

scholarly journals Sublethal Effects of Essential Plant Oils on Biochemical and Ecological Parameters of the Predatory Mite Amblyseius Swirskii

2021 ◽  
Author(s):  
Somayyeh Ghasemzadeh ◽  
Gerben J. Messelink ◽  
Gonzalo A. Avila ◽  
Yongjun Zhang
Keyword(s):  
Essential Oils ◽  
Sublethal Effects ◽  
Negative Impact ◽  
Growth Parameters ◽  
Predatory Mites ◽  
Predatory Mite ◽  
Control Treatment ◽  
Plant Oils ◽  
Transferase Activity ◽  
Amblyseius Swirskii

Abstract The predatory mite Amblyseius swirskii is widely used natural enemy of phytophagous pests. Due to negative effects of conventional pesticides on non-target organism, the development of selective natural and eco-friendly pesticides such as essential plant oils are a useful pest control tool to use in synergy with biological control agents. Essential oils of Nepeta crispa, Satureja hortensis and Anethum graveolens showed promising results to control Tetranychus urticae. Hence an experiment was carried out to evaluate the effects of these essential oils on biochemical and demographic parameters of A. swirskii. Significant reduction of carbohydrate, lipid and protein contents of oil-treated predatory mites was observed. However oils of S. hortensis and A. graveolens had no negative impact on lipid reserve. Glutathione-S-transferase activity of A. swirskii was influenced by A. graveolens. In addition, the enzyme activity of the α-esterases was elevated by all treatments. The essential oils showed no effect on β-esterases activity compared to the control treatment. None of the concentrations of the different tested oils affected the population growth parameters of A. swirskii. However, a significant reduction was observed in oviposition time and total fecundity of predatory mites. Our observations show that the tested essential plant oils need some caution when applied as alternatives to synthetic pesticides in combination with A. swirskii and may have critical implications for Integrated Pest Management (IPM) programs. However, semi-field and field studies are required to evaluate the effects of these products on T. urticae and A. swirskii for developing IPM strategies.

Examining Sublethal Effects of Anticoagulant Rodenticides on Haemosporidian Parasitemia and Body Condition in Migratory Red-Tailed Hawks

2019 ◽  
Vol 53 (4) ◽  
pp. 402 ◽  
Author(s):  
Laura A. Kwasnoski ◽  
Kristina A. Dudus ◽  
Allen M. Fish ◽  
Emily V. Abernathy ◽  
Christopher W. Briggs
Keyword(s):  
Body Condition ◽  
Sublethal Effects ◽  
Anticoagulant Rodenticides

What habitat does spiny snout mite occupy in Tasmania

2015 ◽  
Vol 68 ◽  
pp. 446-446
Author(s):  
D.J. Wilson ◽  
P.J. Gerard
Keyword(s):  
New Zealand ◽  
Sand Dune ◽  
Biocontrol Agent ◽  
Predatory Mites ◽  
Mite Species ◽  
Predatory Mite ◽  
Habitat Specificity ◽  
Nontarget Organisms ◽  
Flea Control ◽  
Potential Biocontrol Agent

Spiny snout mite (Neomolgus capillatus) is a potential biocontrol agent for clover flea (Sminthurus viridis) a white clover pest on dairy farms in warmer and wetter parts of New Zealand In the 1990s this mite was introduced from Brittany France into Tasmania for clover flea control Results during the release programme were highly promising and subsequent anecdotal farmer reports indicate widespread decreases in damage As N capillatus is a predatory mite and already known to attack nontarget organisms habitat specificity will determine whether it could be introduced into New Zealand without risk to native insects To assess this pastures on nine of the original Tasmanian release farms and adjacent nontarget habitats ranging from bush wetlands eucalypt stands to sand dune country were sampled in April 2014 Litter samples were collected heat extracted and mite species identified Neomolgus capillatus was found at effective densities in pastures that had good clover cover Where present it displaced Bdellodes spp mites that are ineffective against clover flea No N capillatus were found in the nontarget habitats all of which lacked clover and contained other predatory mites including Bdellodes spp Therefore the preference by N capillatus for lush pastures makes it an excellent prospect for introduction as a biocontrol agent into clover flea prone regions of New Zealand

Marine Quality Standards: Their Derivation and Application in the United Kingdom

1985 ◽  
Vol 17 (6-7) ◽  
pp. 1187-1198 ◽  
Author(s):  
G. Mance ◽  
A. R. O'Donnell
Keyword(s):  
Coastal Waters ◽  
Sublethal Effects ◽  
Quality Standards ◽  
Toxicity Data ◽  
Marine Life ◽  
Nickel Zinc ◽  
The United Kingdom ◽  
The Common ◽  
Lead Nickel ◽  
The Impact

This paper discusses the derivation of environmental quality standards for coastal waters and the difficulties of using such standards for controlling industrial discharges. Attention is focused on the common List II substances, copper, chromium, lead, nickel, zinc and arsenic - and their effects on marine life. The adequacy of existing toxicity data is discussed and it is concluded that long exposure tests are required to provide information on sublethal effects. Such data are currently limited. It is also important that consideration be given to the effects that reducing salinities and increasing temperatures have in increasing the toxicity of these substances. The complexity of interpreting the results of laboratory toxicity data to coastal waters is discussed with reference to a study of the impact of an industrial discharge.

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