Integrated Pest Control of Victorian Peach Orchards: the Role of Typhlodromus Occidentalis Nesbitt (Acarina: Phytoseiidae).

1976 ◽  
Vol 24 (4) ◽  
pp. 565 ◽  
Author(s):  
RP Field
Keyword(s):  
Predatory Mite ◽  
Epiphyas Postvittana ◽  
Potential Importance ◽  
Cydia Molesta ◽  
Azinphos Methyl ◽  
Substantial Control ◽  
Integrated Pest Control ◽  
Tetranychus Urticae Koch ◽  
Peach Orchard

The potential importance of the predatory mite T. occidentalis in controlling Tetranychus urticae Koch, was evaluated during a 3-year period in a peach orchard at Cobram, Vic. The tolerance of the predator to parathion enabled it to survive where this chemical was applied for control of Cydia molesta Busck. T. occidentalis was not found on leaves where azinphos-methyl was applied. The use of parathion also permitted quicker recolonization by Stethorus species which, together with T. occidentalis, gave substantial control of T. urticae in two out of the three seasons. Lure jars were used to time applications of parathion; adequate control of C. molesta and Epiphyas postvittana Walker was achieved in early and mid-season peach cultivars; however, fruit from a later maturing cultivar was damaged excessively by C. molesta.

Efficacy of the predatory mite Cydnoseius negevi (Swirskii & Amitai) (Acari: phytoseiidae) as a shared predator for sucking pests on sweet pepper in a net house in Egypt

2021 ◽  
Author(s):  
El-laithy A.y. M., E, M.elseedy ◽  
Hoda E. Hussein
Keyword(s):  
Population Density ◽  
Biological Control Agent ◽  
Phytoseiulus Persimilis ◽  
Sweet Pepper ◽  
Predatory Mite ◽  
Control Agent ◽  
Mean Values ◽  
Negative Effect ◽  
Tetranychus Urticae Koch

A field experiment was carried out to evaluate the efficacy of the native predatory mite Cydnoseius negevi (Swirski and Amitai) (=Typlodromus negevi) as a biological control agent for Bemisia tabaci (Gennadius) complex, Onion thrips Thrips tapaci (Lindeman) and Tetranychus urticae (Koch). The efficacy of Phytoseiulus persimilis (Athias-Henriot) against these pests was also evaluated. The data obtained revealed reduction in population density of the above-mentioned pests in the experimental plots for P. persimilis and C. negivi compared to the control plot. Mean population density of each of the pests ranging from 32.2–0.5, 284.4–2.0 and 441.8–2.0 individuals / leaf for T. urticae, in the three plots respectively. The mean values of B. tabaci fluctuated between 41.1–2.1, 16.2–1.0 and 57.3–3.6. individuals / leaf and T. tabaci between 20.1–2.6, 13.7–1.4 and 24.9–1.9 individuals / leaf respectively. A slight non-consumptive negative effect is shown by P. persimilis against the pests B. tabaci and T. tabaci. This preliminary experiment hopefully will enhance the role of the native predator C. negevi to play a role in bio-control and its mass augmentation.

Control of the Two-Spotted Mite in a Victorian Peach Orchard With an Introduced Insecticide-Resistant Strain of the Predatory Mite Typhlodromus Occidentalis Nesbitt (Acarina: Phytoseiidae).

1978 ◽  
Vol 26 (3) ◽  
pp. 519 ◽  
Author(s):  
RP Field
Keyword(s):  
North America ◽  
Resistant Strain ◽  
Brown Rot ◽  
Predatory Mite ◽  
The Other ◽  
Oriental Fruit Moth ◽  
Phytoseiid Mite ◽  
Azinphos Methyl ◽  
Peach Orchard

A strain of the phytoseiid mite Typhlodromus occidentalis, introduced from North America and known to be resistant to azinphos-methyl and various other pesticides, was released into a commercial peach orchard at Undera, Vic., in December 1974. Its effect on the two-spotted mite, Tetranychus urticae, was studied under various spraying programs for three successive seasons. The predator quickly established itself on the release trees and controlled T. urticae in each season under spray programs which included azinphos-methyl or phosmet for controlling Oriental fruit moth, pirimicarb for aphids, ziram for leaf curl and rust, mancozeb for rust, captan and triforine for brown rot, and ethephon for promoting even fruit ripening. However, it did not establish on trees treated with benomyl for the control of brown rot. The predator rapidly spread throughout the orchard and only one acaricide application was required on non-release trees during the three seasons. Native coccinellids (Stethorus spp.) were important predators of T. urticae in the early part of the second season but not in the other two seasons.

scholarly journals Reproductive parameters of Phytoseiulus macropilis (Banks) fed with Tetranychus urticae Koch (Acari: Phytoseiidae, Tetranychidae) in laboratory

2017 ◽  
Vol 77 (1) ◽  
pp. 162-169 ◽  
Author(s):  
G. C. Souza-Pimentel ◽  
P. R. Reis ◽  
C. R. Bonatto ◽  
J. P. Alves ◽  
M. F. Siqueira
Keyword(s):  
Tetranychus Urticae ◽  
Generation Time ◽  
Economic Value ◽  
Predatory Mites ◽  
Predatory Mite ◽  
Reproductive Parameters ◽  
Important Species ◽  
Phytoseiulus Macropilis ◽  
Biological Aspects ◽  
Tetranychus Urticae Koch

Abstract Predatory mites that belong to the Phytoseiidae family are one of the main natural enemies of phytophagous mites, thus allowing for their use as a biological control. Phytoseiulus macropilis (Banks, 1904) (Acari: Phytoseiidae) is among the main species of predatory mites used for this purpose. Tetranychus urticae Koch, 1836 (Acari: Tetranychidae) is considered to be one of the most important species of mite pests and has been described as attacking over 1,100 species of plants in 140 families with economic value. The objective of the present study was to investigate, in the laboratory, the reproductive parameters of the predatory mite P. macropilis when fed T. urticae. Experiments were conducted under laboratory conditions at 25 ± 2 °C of temperature, 70 ± 10% RH and 14 hours of photophase. In addition, biological aspects were evaluated and a fertility life table was established. The results of these experiments demonstrated that the longevity of adult female was 27.5 days and adult male was 29.0 days. The population was estimated to increase approximately 27 times (Ro) in mean generation time (T), which was 17.7 days. Lastly, the mite population grew 1.2 times/day (λ) and doubled every 3.7 days (TD).

scholarly journals MAXIMIZING SHEEP PRODUCTION FROM GRASSLAND

1981 ◽  
pp. 70-81
Author(s):  
P.V. Rattray
Keyword(s):  
Utilization Rate ◽  
Potential Importance ◽  
Critical Periods ◽  
Short Term ◽  
Potential Productivity ◽  
Rate Of Growth ◽  
Potential Impact ◽  
Sheep Production ◽  
Stocking Rates

Levels of sheep production/ha obtained on research farmlets have been considerably greater than those obtained on farms on similar land, probably because the higher stocking rates used resulted in greater levels of pasture utilization. Rate of growth early in life influences potential productivity of the mature breeding ewe. Good rearing and the use of genetically superior stock both appear essential for maximizing production. Short-term studies have identified critical periods when level of feeding could have a potential impact on over-all productivity. Such work has re-emphasized the potential importance of feeding premating especially for reducing liveweight loss and for light ewes. Optimum pasture conditions for flushing have been defined, along with the possible role of supplements such as wilted silage.

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