A model of the biological control of Acarus siro by Cheyletus eruditus (Acari: Acaridae, Cheyletidae) on grain

2004 ◽  
Vol 77 (1) ◽  
pp. 1-10 ◽  
Author(s):  
Stano Pekár ◽  
Eva Žďárková
Keyword(s):  
Biological Control ◽  
Acarus Siro ◽  
Cheyletus Eruditus

scholarly journals Development of Cheyletus eruditus (Schrank) (Acarina: Cheyletidae) at low temperature

1999 ◽  
Vol 35 (No. 1) ◽  
pp. 14-16 ◽  
Author(s):  
E. Ždarková ◽  
P. Horák
Keyword(s):  
Biological Control ◽  
Low Temperature ◽  
Predatory Mite ◽  
Temperature Threshold ◽  
Acarus Siro ◽  
Cheyletus Eruditus

Development of the predatory mite C. eruditus was examined at 12, 14 and 25°C and 75% r.h. 12°C is the low temperature threshold for development of this species where development lasts 164 days, compared with 47 days of its prey Acarus siro under the same conditions. Since repressive biological control cannot be successful under those circumstances, the predators can only be used preventively in empty stores.

scholarly journals Compatibility of Cheyletus eruditus (Schrank) (Acari: Cheyletidae) and Ce­phalonomia tarsalis (Ashmead) (Hymenoptera: Bethylidae) in biological control of stored grain pests

2011 ◽  
Vol 39 (No. 1) ◽  
pp. 29-34 ◽  
Author(s):  
E. Žďárková ◽  
J. Lukáš ◽  
P. Horák
Keyword(s):  
Biological Control ◽  
Laboratory Experiment ◽  
Natural Enemies ◽  
Predatory Mite ◽  
Oryzaephilus Surinamensis ◽  
Stored Grain ◽  
Acarus Siro ◽  
Stored Grain Pests ◽  
Cheyletus Eruditus ◽  
Initial Infestation

A laboratory experiment was carried out on stored wheat infested by the stored product mite Acarus siro and beetle Oryzaephilus surinamensis. The initial infestation was 150 mites of A. siro and 15 beetles of O. surinamensis per 1 kg of wheat. The predatory mite Cheyletus eruditus and parasitoid Cephalonomia tarsalis were added in the ratio 1:20 and 1:12, repectively. Three combinations were tested: (1) mites and (2) beetles separately, and (3) mites and beetles together. The experiment ran for three months at 22°C and 75% RH. The pests were suppressed by their antagonists in all combinations. Synchronous application of both natural enemies resulted in better control of O. surinamensis through an enhanced effect of both antagonists.

CONTROL OF TYROGLYPHOID MITES IN STORED GRAIN BY THE PREDATORY MITE CHEYLETUS ERUDITUS (SCHRANK)

1965 ◽  
Vol 43 (3) ◽  
pp. 417-432 ◽  
Author(s):  
J. Pulpán ◽  
P. H. Verner
Keyword(s):  
Biological Control ◽  
Moisture Content ◽  
Stored Grain ◽  
Predacious Mite ◽  
Complete Eradication ◽  
Acarus Siro ◽  
Long Term Storage ◽  
Mite Control ◽  
Cheyletus Eruditus ◽  
Artificial Introduction

The authors deal with the problem of mite infestation of stored grain in Czechoslovakia, where more than 10% of the grain is infested by Acarus siro L. and Glycyphagus destructor (Schr.). The methods of mite control hitherto used (fumigants CH3Br, HCN, and ALP) were poor and of short duration. Accordingly, the authors investigated the possibility of biological control using the predacious mite Cheyletus eruditus (Schr.). Some observations showed spontaneous biological control, culminating in the complete eradication of the grain mites. The investigation covered eight grain storages. Details are given of the characteristic course of observations in one grain store, and the results of seven other stores are summarized. In three other stores was studied the influence of cleanliness and moisture contents of grain on the development of mites. The authors found that the mites multiplied on uncleaned wheat (16% moisture content), on cleaned wheat (16% moisture content), and on dry, uncleaned wheat (14% moisture content) in the ratio of 100:10:1.Further details are given about two semioperational trials following the introduction of the predacious mite Cheyletus eruditus (Schr.). These trials were generally successful with the complete eradication of harmful mites.The authors report successful results on the introduction of the predacious mite into uninfested grain destined for long-term storage. They discuss 28 experiments with its artificial introduction (25 successful in biological control) and the course of an operational trial which showed good results as well. Experiences and results from semioperational and operational trials form the basis of a set of technological principles as a guide to practice. It is recommended that the predacious mite be collected from natural biotopes where complete eradication of harmful mites has already been completed. For successful results, the authors recommend artificial introduction in spring or autumn (temperature 5–10 °C) on the surface of grain in the proportion 1:100 to 1:1000 (Cheyletus eruditus Schr.: Acarus siro L. + Glycyphagus destructor Schr.).

A Technique for Maintaining Acarine Predator-Prey Populations

1960 ◽  
Vol 92 (3) ◽  
pp. 234-237 ◽  
Author(s):  
T. Burnett
Keyword(s):  
Growth Forms ◽  
Predator Prey ◽  
Acarus Siro ◽  
Large Numbers ◽  
Cheyletus Eruditus ◽  
Prey Populations

Experiments with the growth-forms of acarine predator and prey populations require a constant supply of both species. This note describes a technique used for maintaining large numbers of Tyrophagus castellanii (Hirst) and its predator Melichares dentriticus (Berl.) and of Acarus siro L. and its predator Cheyletus eruditus (Schrank)

Mites in dried figs of Turkey: diversity, species composition and density

2019 ◽  
Vol 24 (6) ◽  
pp. 992-997 ◽  
Author(s):  
Hulya Dizlek ◽  
Mehmet Karagoz ◽  
Farid Faraji ◽  
Ibrahim Cakmak
Keyword(s):  
Species Composition ◽  
Mite Species ◽  
Predatory Mite ◽  
Infestation Rate ◽  
Pest Species ◽  
Tyrophagus Putrescentiae ◽  
Acarus Siro ◽  
Blattisocius Tarsalis ◽  
Cheyletus Eruditus ◽  
Over Time

This study was conducted to determine mite species in dried figs in Aydin, Turkey between August 2014 and November 2016. A total of 141 dried fig samples were taken from producers’ storage, commercial storages and fig processing factories in Buharkent, Germencik, Incirliova, Kocarli, Kosk, Kuyucak, Merkez, Nazilli, Sultanhisar and Yenipazar districts. In addition, 24 dried fig samples were kept in storage for 8 months and the changes in mite species composition and their densities in stored figs were determined. As a result, 8 mite species belonging to 3 orders and 5 families were identified from the dried figs. Acarus siro L., Carpoglyphus lactis (L.), Glycyphagus destructor (Schrank), G. domesticus (De Geer) and Tyrophagus putrescentiae (Schrank) as pest species, and Blattisocius tarsalis (Berlese), B. mali (Oudemans) and Cheyletus eruditus (Schrank) as predatory mite species were found. Out of 141 samples, 133 were infested with mites and the infestation ratio was 94.3%. Tyrophagus putrescentiae was the most common pest species with an infestation rate of 72.3%, followed by C. lactis with 34.8%, A. siro, G. destructor and G. domesticus with 0.7% contamination, respectively. Carpoglyphus lactis was found to have the highest density with 10,488 individuals/kg in contaminated fig samples. Blattisocius tarsalis was the most common predatory mite species with an infestation rate of 77.3%. Blattisocius mali and C. eruditus were found in 9.2% and 4.3% of dried figs, respectively. This study showed that the dried fig samples kept in storage were always vulnerable to contamination with mites. Mite species composition and their densities also fluctuated over time.

scholarly journals Arthropod Infestation in Samples of Stored Seeds in the Czech Republic

2011 ◽  
Vol 40 (No. 1) ◽  
pp. 11-16 ◽  
Author(s):  
Z. Kučerová ◽  
P. Horák
Keyword(s):  
Czech Republic ◽  
Predatory Mite ◽  
Tyrophagus Putrescentiae ◽  
The Czech Republic ◽  
Grass Seed ◽  
Acarus Siro ◽  
Cheyletus Eruditus

Twenty-one types of seed samples (mainly vegetable and grass seed) were analysed in laboratory and 60% arthropod infestation (14 Acarina, 5 Psocoptera species) was found. The seeds of beet, grass, onion, radish and lettuce were most sensitive to infestation. Acarus siro was a dominant mite pest from all aspects (frequency, abundance and seed diversity infestation), followed by Tyrophagus putrescentiae, Tarsonemus granarius and Lepidoglyphus destructor. Cheyletus eruditus was a dominant predatory mite. Lepinotus patruelis was the most frequent psocid pest.  

scholarly journals Biological control of stored food mites on oilsecds using the mite predator Cheyletus eruditus (Schrank)

1999 ◽  
Vol 35 (No. 4) ◽  
pp. 136-138
Author(s):  
E. Žďárková ◽  
R. Feit
Keyword(s):  
Biological Control ◽  
Cheyletus Eruditus ◽  
Mite Predator

The suppressive biological control of mites on oilseeds can be successful under the circumstances of the ratio of prey and predators being I  : 20 to 1 : 50 and the original infestation not being higher than 500 specimens per 1  kg. Preventive biological control was carried out in empty oilseed stores after they were cleared. The predators which were released in the stores 2000 specimen s being evenly distributed over an area of 100 m<sup>2</sup> were successful and suppress the population of acaroid mites.

scholarly journals Bionomics of Acarus siro L. (Acarina: Acaridae) on oilseeds

2001 ◽  
Vol 37 (No. 3) ◽  
pp. 111-114 ◽  
Author(s):  
R. Fejt ◽  
E. Žďárková
Keyword(s):  
Biological Control ◽  
Life Span ◽  
Oviposition Period ◽  
Single Female ◽  
Acarus Siro ◽  
Stored Product Mites ◽  
Higher Temperature ◽  
Eggs And Larvae

The bionomics of Acarus siro was studied at 18 and 20°C and 70 and 80% R.H. on wheat germs, linseed, rapeseed and sunflowers to obtain data for optimisation of biological control of stored product mites on oilseeds. Wheat germs were used as a control substrate as they were considered optimal for development of A. siro. The development of eggs and larvae was longer than that of protonymphs and tritonymphs. Wheat germs appeared to be a better substrate for the development of mites than oilseeds. Generally, the life span of females as well as the oviposition period was shortest on wheat germs while longest on sunflower; also, at the higher temperature the female life span was shorter. The maximum number of eggs laid by a single female (356) was recorded on wheat germs at 20°C and 80% R.H. The development was significantly shorter at 20°C than at 18°C regardless of humidity. There were no significant differences between the effects of the tested oilseeds.

CHEYLETUS ERUDITUS(TAURRUS®): AN EFFECTIVE CANDIDATE FOR THE BIOLOGICAL CONTROL OF THE SNAKE MITE (OPHIONYSSUS NATRICIS)

2013 ◽  
Vol 44 (3) ◽  
pp. 654-659 ◽  
Author(s):  
Lionel H. Schilliger ◽  
Damien Morel ◽  
Jesse H. Bonwitt ◽  
Olivier Marquis
Keyword(s):  
Biological Control ◽  
Cheyletus Eruditus
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