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 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&deg;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.

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

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.).

scholarly journals Mite fauna (Acari) associated with the poultry industry in different laying hen management systems in Southern Brazil: a species key

Acarologia ◽  
2018 ◽  
Vol 58 (1) ◽  
pp. 140-158
Author(s):  
Tamara Bianca Horn ◽  
Juliana Granich ◽  
Júlia Horn Körbes ◽  
Guilherme Liberato Da Silva ◽  
Noeli Juarez Ferla
Keyword(s):  
Biological Control ◽  
Wild Bird ◽  
Laying Hen ◽  
Management Systems ◽  
Dichotomous Key ◽  
Poultry Farms ◽  
Hen Feathers ◽  
Cheyletus Malaccensis ◽  
Cheyletus Eruditus ◽  
Blattisocius Dentriticus

This study is based on results from a large project on the mite diversity in commercial laying hen systems in Brazil. It aims to identify potential biocontrol agents amongst mites present in poultry farms, with a focus on one feather mite pest Megninia ginglymura. A secondary goal is to provide an operational identification tool to help the development of biological control in poultry farms. Sampling was conducted from August 2013 to August 2014, with 43 sampling events, in three different laying hen management systems. We used traps, laying hen feathers, and abandoned wild bird nests to collect the mites. A total of 38,862 mites belonging to 23 families and 39 species were found, including 17 species exclusively found in traps, six in wild bird nests, and one in feathers. The most abundant and frequent ectoparasitic species was M. ginglymura (76.3%; observed in all management systems). Amongst other mites, Tydeidae showed the highest richness with five species (Brachytydeus argentinensis (Baker, 1970), Brachytydeus australensis (Baker, 1970), Brachytydeus obnoxia (Kuznetzov and Zapletina, 1972), Brachytydeus oregonensis (Baker, 1970), and Brachytydeus tuttlei (Baker, 1965)), followed by Cheyletidae with four species (Chelacheles bipanus Summers and Price, 1970, Cheyletus eruditus (Schrank, 1781), Cheyletus malaccensis (Oudemans, 1903), and Cheletomimus (Hemicheyletia) wellsi (Baker, 1949)). Potential predatory species for biological control were C. malaccensis (9.4%), Typhlodromus transvaalensis (Nesbitt, 1951) (0.8%), Blattisocius keegani (Fox, 1947) (0.7%), and Blattisocius dentriticus (Berlese, 1918) (0.4%). A dichotomous key is provided to identify 48 species dwelling in Brazilian layer farms.

Electron investigations of rhabdovirus-like particles in mexican bean beetles and crickets

1978 ◽  
Vol 36 (2) ◽  
pp. 378-379
Author(s):  
J. R. Adams ◽  
G. J Tompkins ◽  
A. M. Heimpel ◽  
E. Dougherty
Keyword(s):  
Biological Control ◽  
Integrated Pest Management ◽  
Pest Management ◽  
Developmental Stages ◽  
Management Program ◽  
Acheta Domesticus ◽  
Epilachna Varivestis ◽  
House Cricket ◽  
Similar Morphology ◽  
Bean Beetle

As part of a continual search for potential pathogens of insects for use in biological control or on an integrated pest management program, two bacilliform virus-like particles (VLP) of similar morphology have been found in the Mexican bean beetle Epilachna varivestis Mulsant and the house cricket, Acheta domesticus (L. ).Tissues of diseased larvae and adults of E. varivestis and all developmental stages of A. domesticus were fixed according to procedures previously described. While the bean beetles displayed no external symptoms, the diseased crickets displayed a twitching and shaking of the metathoracic legs and a lowered rate of activity.Examinations of larvae and adult Mexican bean beetles collected in the field in 1976 and 1977 in Maryland and field collected specimens brought into the lab in the fall and reared through several generations revealed that specimens from each collection contained vesicles in the cytoplasm of the midgut filled with hundreds of these VLP's which were enveloped and measured approximately 16-25 nm x 55-110 nm, the shorter VLP's generally having the greater width (Fig. 1).

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