scholarly journals Predatory Gall Midge (unofficial common name), Feltiella acarisuga (Vallot) (Insecta: Diptera: Cecidomyiidae)

EDIS ◽  
1969 ◽  
Vol 2004 (16) ◽  
Author(s):  
Ryan S. Osborne ◽  
Norman C. Leppla ◽  
Lance S. Osborne
Keyword(s):  
Spider Mite ◽  
Cropping Systems ◽  
Gall Midge ◽  
Spider Mites ◽  
Cooperative Extension Service ◽  
Twospotted Spider Mite ◽  
University Of Florida ◽  
Greenhouse Crops ◽  
Tetranychus Urticae Koch ◽  
Predatory Gall Midge

The predatory gall midge, Feltiella acarisuga (Vallot), is one of the most effective and widespread natural enemies of spider mites (Tetranychidae) (Gagne 1995). It is a particularly important natural enemy of the twospotted spider mite, Tetranychus urticae Koch, in a number of cropping systems (Opit et al. 1997). F. acarisuga could be particularly useful for integrated pest management of spider mites that attack greenhouse crops (Gillespie et al. 1998). This document is EENY-269, one of a series of Featured Creatures from the Entomology and Nematology Department, Florida Cooperative Extension Service, Institute of Food and Agricultural Sciences, University of Florida. Published: June 2002.  EENY269/IN549: Predatory Gall Midge (Unofficial Common Name), Feltiella acarisuga (Vallot) (Insecta: Diptera: Cecidomyiidae) (ufl.edu)

scholarly journals Commercial Availability of Predatory Mites

EDIS ◽  
1969 ◽  
Vol 2005 (1) ◽  
Author(s):  
Silvia I. Rondon ◽  
James F. Price ◽  
Oscar E. Liburd ◽  
Roger Francis ◽  
Daniel J. Cantliffe
Keyword(s):  
Spider Mite ◽  
Cropping Systems ◽  
Phytoseiulus Persimilis ◽  
Predatory Mites ◽  
Mite Species ◽  
Cooperative Extension Service ◽  
Publication Date ◽  
University Of Florida ◽  
Broad Mite ◽  
Tetranychus Urticae Koch

Predatory mites such as Neoseiulus californicus McGregor (Fig. 1) and Phytoseiulus persimilis Athias-Henriot (Fig. 2) feed on important fruits and ornamental pests such as the twospotted spider mite (Tetranychus urticae Koch), broad mite (Polyphagotarsonemus (Stenotarsonemus) latus Banks), cyclamen mite (Tarsonemus pallidus L.), and other mite species. These predatory mites are associated with several agricultural cropping systems including strawberries, raspberries, roses, grapes, citrus, ornamentals, and vegetables. Predatory mites have been used as an alternative to miticides on a variety of crops. Their commercial availability is crucial. This document is HS1000, one of a series of the Horticultural Sciences Department, Florida Cooperative Extension Service, Institute of Food and Agricultural Sciences, University of Florida. Publication date: November 2004.

scholarly journals Twospotted Spider Mite, Tetranychus urticae Koch (Arachnida: Acari: Tetranychidae)

EDIS ◽  
1969 ◽  
Vol 2003 (15) ◽  
Author(s):  
Thomas R. Fasulo ◽  
Harold A. Denmark
Keyword(s):  
Tetranychus Urticae ◽  
Spider Mite ◽  
Immature Stage ◽  
Cooperative Extension Service ◽  
The Body ◽  
Extension Service ◽  
Twospotted Spider Mite ◽  
University Of Florida ◽  
Tetranychus Urticae Koch ◽  
Twospotted Spider

The twospotted spider mite, Tetranychus urticae Koch, has been controversial in its taxonomic placement. About 60 synonyms included under this species have compounded the controversy. The body of a spider mite is separated into two distinct parts: (1) the gnathosoma and (2) the idiosoma. The gnathosoma includes only themouthparts. The idiosoma is the remainder of the body and parallels the head, thorax and abdomen of insects. After hatching from the egg, the first immature stage (larva) has three pair of legs. The following nymphal stages and the adult have four pairs of legs. This document is EENY-150 (originally published as DPI Entomology Circular 89), one of a series of Featured Creatures from the Entomology and Nematology Department, Florida Cooperative Extension Service, Institute of Food and Agricultural Sciences, University of Florida. Published: August 2000.  EENY150/IN307: Twospotted Spider Mite, Tetranychus urticae Koch (Arachnida: Acari: Tetranychidae) (ufl.edu)

Effect of Barren Soil Borders and Weed Border Treatments on Movement of the Twospotted Spider Mite into Peanut Fields1,2,3

1984 ◽  
Vol 11 (1) ◽  
pp. 52-55 ◽  
Author(s):  
L. S. Boykin ◽  
W. V. Campbell ◽  
L. A. Nelson
Keyword(s):  
Spider Mite ◽  
Field Tests ◽  
Spider Mites ◽  
Twospotted Spider Mite ◽  
Field Cage ◽  
Arachis Hypogaea L ◽  
Barren Soil ◽  
Tetranychus Urticae Koch ◽  
Over Time ◽  
Twospotted Spider

Abstract Barren soil borders, weed border treatments, and caged barren soil were evaluated for their effect on movement of the twospotted spider mite, Tetranychus urticae Koch, into peanut (Arachis hypogaea L.) fields. In field cage tests when a 3, 4.5, or 6 m strip of barren soil separated a source of mite-infestation from initially mite-free peanut, mite damage to peanut was inversely related to the distance of barren soil crossed. In uncaged field tests, similar barren soil borders did not prevent mite movement into peanut fields, however, the number of mites were inversely related to the distance from the field border. There were no significant differences among weed border treatments and total numbers of mites entering peanut fields over time. There were, however, differences among weed border treatments on early mite movement and establishment trends into peanut fields. Mowing weed borders significantly increased the number of aerially dispersing twospotted spider mites within the adjacent peanut field.

scholarly journals Insect Management for Carrots

EDIS ◽  
2019 ◽  
Vol 2005 (11) ◽  
Author(s):  
Susan E. Webb
Keyword(s):  
Spider Mite ◽  
Insect Pests ◽  
Cooperative Extension Service ◽  
Twospotted Spider Mite ◽  
University Of Florida ◽  
Tarnished Plant Bug ◽  
Insect Management ◽  
Field Crickets ◽  
Mole Crickets ◽  
Minimal Damage

There are no major insect pests on carrot in Florida. The greatest concern for growers has been root damage from soil pests, particularly wireworms (southern potato and tobacco), cutworms (variegated, granulate, black), and mole crickets, all of which are sporadic. Occasional minor pests include leafminers (especially the vegetable leafminer), aphids (green peach and melon), and weevils (especially vegetable weevils). Other arthropods that may occasionally cause minimal damage to carrots in Florida include armyworms (fall, beet, and southern), field crickets, mites (especially twospotted spider mite), and plant bugs (including tarnished plant bug). This document is ENY-462, one of a series of the Entomology & Nematology Department, Florida Cooperative Extension Service, Institute of Food and Agricultural Sciences, University of Florida. Published: July 2002. Revised: August 2005. ENY-462/IG148: Insect Management for Carrots (ufl.edu)

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.

Oviposition Response of Tetranychus urticae (Acari: Tetranychidae) to Direct Treatment and Residue of Pyrethroids on Soybean

1990 ◽  
Vol 25 (1) ◽  
pp. 158-169 ◽  
Author(s):  
D. J. Donahue ◽  
R. M. McPherson
Keyword(s):  
Tetranychus Urticae ◽  
Spider Mite ◽  
Leaf Surface ◽  
Oviposition Rate ◽  
Twospotted Spider Mite ◽  
Direct Treatment ◽  
Dosage Rate ◽  
Direct Exposure ◽  
Tetranychus Urticae Koch ◽  
Twospotted Spider

The oviposition response of the twospotted spider mite (TSSM), Tetranychus urticae Koch, to direct treatment and residues of fenvalerate and permethrin on soybean was examined in the laboratory. Contact with pyrethroid residues (120 ppm) reduced eggs per mite-day for 72 h, then oviposition rates returned to normal. Most eggs (99%) on the control leaflets were oviposited directly on the leaf surface, while 83% and 78% of the eggs in the fenvalerate and permethrin treatments were suspended off the leaf surface onto trichomes, cage walls or in the silk webbing. Oviposition rate on untreated soybean foliage following five days on pyrethroid residues was essentially the same for all TSSM; however, the mites previously exposed to fenvalerate or permethrin residue still oviposited 85% and 37% of their eggs off the untreated leaf surface, respectively. A 120 ppm concentration of fenvalerate directly applied to TSSM resulted in 83% and 100% mortality after 24 h and 48 h and no oviposition. A similar direct exposure to permethrin (120 ppm) resulted in 54% mortality after 48 h, and a 58.5% reduction in eggs per mite-day. Direct exposure to a lower dosage rate (12 ppm) caused little mortality but significantly reduced the number of eggs produced in both fenvalerate and permethrin treatments for 48 h. Oviposition returned to normal after 72 h.

Ultrastructure of the Alimentary Canal of the Twospotted Spider Mite, Tetranychus urticae Koch (Acarina:Tetranychidae)

2004 ◽  
Vol 10 (S02) ◽  
pp. 1558-1559
Author(s):  
A R Crooker
Keyword(s):  
Tetranychus Urticae ◽  
Alimentary Canal ◽  
Spider Mite ◽  
Twospotted Spider Mite ◽  
Tetranychus Urticae Koch ◽  
Twospotted Spider

Extended abstract of a paper presented at Microscopy and Microanalysis 2004 in Savannah, Georgia, USA, August 1–5, 2004.

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.

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