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 Resistance of Wild Species of Arachis to the Twospotted Spider Mite, Tetranychus Urticae1,2,3

1977 ◽  
Vol 4 (1) ◽  
pp. 9-11 ◽  
Author(s):  
D. R. Johnson ◽  
J. C. Wynne ◽  
W. V. Campbell
Keyword(s):  
Tetranychus Urticae ◽  
Arachis Hypogaea ◽  
Wild Species ◽  
Spider Mite ◽  
Twospotted Spider Mite ◽  
Plant Introductions ◽  
Study Section ◽  
Arachis Hypogaea L ◽  
Tetranychus Urticae Koch ◽  
Twospotted Spider

Abstract Wild species of Arachis representing all seven sections of the genus were screened in the greenhouse for resistance to the twospotted spider mite, Tetranychus urticae Koch. Most species of the section RHIZOMATOSAE were found to be highly resistant to the mite. Plant introductions 338296, 338317, 262840, 262827 and several other members of the section RHIZOMATOSAE were virtually mite free throughout the tests. PI 276203 from section EXTRANERVOSAE, PI 262142 from section ERECTOIDES and PI 331194 from section ARACHIS also had relatively low damage ratings in this study. Section Arachis is the only section with resistance to the mite that will cross readily with cultivated peanuts, Arachis hypogaea L. Thus the utilization of germplasm resistant to the mite from the wild species will require complicated and difficult breeding procedures.

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 Effect of Fungicides and Miticides with Mitochondria Electron Transport Inhibiting Activity on the Twospotted Spider Mite, Tetranychus urticae (Acari: Tetranychidae)

HortScience ◽  
2010 ◽  
Vol 45 (4) ◽  
pp. 687-689 ◽  
Author(s):  
Raymond A. Cloyd ◽  
Cindy L. Galle ◽  
Stephen R. Keith ◽  
Kenneth E. Kemp
Keyword(s):  
Electron Transport ◽  
Tetranychus Urticae ◽  
Spider Mite ◽  
Adult Life ◽  
Spider Mites ◽  
Twospotted Spider Mite ◽  
Negative Effects ◽  
Percentage Mortality ◽  
Horticultural Crops ◽  
Twospotted Spider

The twospotted spider mite, Tetranychus urticae, is a major arthropod pest of many greenhouse-grown horticultural crops. Greenhouse producers use a variety of miticides to suppress twospotted spider mite populations. A group of miticides known as mitochondria electron transport inhibitors or METIs include acequinocyl, fenpyroximate, and pyridaben. In addition, there are strobilurin-based fungicides such as azoxystrobin, kresoxim-methyl, and trifloxystrobin that are also known as METIs. We conducted a study to determine if these METI fungicides had any miticidal properties against the nymph and adult stages of the twospotted spider mite. The designated treatments were applied to marigold (Tagetes erecta) plants naturally infested with twospotted spider mites. Assessments of live and dead twospotted spider mite nymphs and adults were conducted 3, 7, and 14 days after applying the treatments. None of the METI fungicides had any activity against the nymph and adult life stages of the twospotted spider mite, with percentage mortality values <18%. The METI miticides appeared to be more effective against twospotted spider mite nymphs than the adults based on percentage mortality values across the three evaluation periods (35.2% to 100% for nymphs and 11.4% to 87.9% for adults). This study demonstrated that the strobilurin-based fungicides have negligible negative effects on twospotted spider mites.

Effect of Pesticide Interactions on the Twospotted Spider Mite on Peanuts1,2

1978 ◽  
Vol 5 (2) ◽  
pp. 83-86 ◽  
Author(s):  
W. V. Campbell
Keyword(s):  
North Carolina ◽  
Tetranychus Urticae ◽  
Spider Mite ◽  
Field Conditions ◽  
Severe Injury ◽  
Twospotted Spider Mite ◽  
Tetranychus Urticae Koch ◽  
Twospotted Spider

Abstract Pesticides commonly applied to the foliage of peanuts in North Carolina were evaluated under field conditions for their effect on the twospotted spider mite Tetranychus urticae Koch. Most fungicides caused a higher mite increase than insecticides on NC 2 peanuts. When fungicides and insecticides were tank mixed or applied on alternate weeks, mite outbreaks occurred. These outbreaks were followed by severe injury to the foliage and finally defoliation and yield reductions. Among the fungicides applied only Du-Ter and Copper Count failed to cause significant mite damage even when combined with an insecticide. Since mites failed to develop on untreated peanuts following six or more mite releases during the season, it was apparent that pesticides predispose peanuts to spider mite buildup and damage.

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