scholarly journals Functional response of two Neoseiulus species preying on Tetranychus urticae Koch 

2017 ◽  
Vol 22 (7) ◽  
pp. 1059 ◽  
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.

scholarly journals Bifenazate, a prospective acaricide for spider mite (Tetranychus urticae Koch) control in Czech hops

2010 ◽  
Vol 46 (No. 3) ◽  
pp. 135-138
Author(s):  
J. Vostřel
Keyword(s):  
Czech Republic ◽  
Tetranychus Urticae ◽  
Laboratory Tests ◽  
Spider Mite ◽  
Spider Mites ◽  
The Czech Republic ◽  
Tetranychus Urticae Koch ◽  
Good Substitute

Bifenazate, a new selective carbazate acaricide, seems to be a very good substitute for propargite to control spider mites (Tetranychus urticae Koch) on hops in the Czech Republic. To investigate the phenomenon of T. urticae resistance to this compound, 20 samples of field populations were taken in several Czech and Moravian hop-growing regions in 2006 and 2007 and subjected to laboratory tests in a Potter tower. Low values of C100 M (100% mortality) in comparison with the supposed registered concentration reveal that bifenazate may become a useful acaricide within the anti-resistant strategy against T. urticae not only in Czech but also in all European hop-growing regions.

Repellency and Repulsiveness of Selected Agrichemicals to the Two-Spotted Spider Mite (Tetranychus urticae) on Grape Foliage

2005 ◽  
Vol 6 (1) ◽  
pp. 1 ◽  
Author(s):  
Douglas B. Walsh ◽  
Gary G. Grove
Keyword(s):  
Bacillus Thuringiensis ◽  
Tetranychus Urticae ◽  
Spider Mite ◽  
Spatial Dynamics ◽  
Spider Mites ◽  
Leaf Disk ◽  
Plant Canopies ◽  
Two Spotted Spider Mite ◽  
Tetranychus Urticae Koch ◽  
Spray Adjuvants

Leaf disk and whole leaf bioassays were conducted to evaluate the repellency and repulsiveness of selected fungicides, insecticides, spray adjuvants, and petroleum-derived spray oils (PDSO) to the two-spotted spider mite, Tetranychus Urticae Koch (Acari: Tetranychidae). Compounds were evaluated for their ability to stimulate the movement of T. urticae from treated to nontreated grape tissue (repellency) and to inhibit their movement from untreated to treated tissue (repulsiveness). All insecticides other than Bacillus thuringiensis and some fungicides were highly repellent. Several insecticides and fungicides, and all spray adjuvants, were highly repulsive. We conclude that many agrichemicals are irritating to two-spotted spider mites and may impact their spatial dynamics within plant canopies. Accepted for publication 7 November 2005. Published 28 December 2005.

Phytoseiid mites (Acari: Phytoseiidae) from Chile, with descriptions of three new species and a redescription of Chileseius camposi

Zootaxa ◽  
2018 ◽  
Vol 4482 (2) ◽  
pp. 322
Author(s):  
R. D. TRINCADO ◽  
J. P. I. MARTIN ◽  
D. D. MÉNDEZ ROSA ◽  
P. C. LOPES ◽  
G. J. DE MORAES
Keyword(s):  
Biological Control ◽  
New Species ◽  
Tetranychus Urticae ◽  
Spider Mite ◽  
Phytoseiulus Persimilis ◽  
Phytoseiid Mites ◽  
Three New Species ◽  
Two Spotted Spider Mite ◽  
Amblyseius Herbicolus ◽  
Tetranychus Urticae Koch

A total of 40 phytoseiid species has been reported from Chile, including the two species (Neoseiulus californicus (McGregor) and Phytoseiulus persimilis (Athias-Henriot) most widely used worldwide for the biological control of the two-spotted spider mite, Tetranychus urticae Koch (Tetranychidae). In this paper we report nine other species found in new collecting conducted since 1989, including three new species: Amblyseius herbicolus (Chant), Amblyseius tamatavensis Blommers, Arrenoseius robertogonzalezi Trincado & Martin n. sp., Neoseiulus anonymus (Chant & Baker), Neoseiulus bicaudus (Wainstein), Neoseiulus viticolus Trincado & Martin n. sp., Metaseiulus (Metaseiulus) camelliae (Chant & Yoshida-Shaul), Metaseiulus (Metaseiulus) neoflumenis Moraes & Kreiter and Metaseiulus (Metaseiulus) relictus Trincado & Martin n. sp.. Chileseius camposi Gonzalez & Schuster, 1962 is redescribed, and a list of all species presently known from Chile and a key to help in their separation are given. A new name, Proprioseiopsis kargi Trincado nom. nov., is a replacement name for Proprioseiopsis globosus Karg, 1976, a junior homonym of Proprioseiopsis globosus (Gonzalez & Schuster, 1962). 

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