scholarly journals Efficacy of some plant extracts against Tetranychus urticae Koch (Acari: Tetranychidae) on cucumber and kidney bean crops under laboratory and field conditions

2021 ◽  
Vol 0 (0) ◽  
pp. 61-70
Author(s):  
A. Mohamed ◽  
M. Abdel-Samad ◽  
Sh. Abouelkassem ◽  
M. AbouShosha
Keyword(s):  
Tetranychus Urticae ◽  
Plant Extracts ◽  
Field Conditions ◽  
Kidney Bean ◽  
Tetranychus Urticae Koch

scholarly journals Occurrence of Two-Spotted Spider Mite (Tetranychus urticae Koch) on Potentilla fruticosa Cultivars

2016 ◽  
Vol 24 (2) ◽  
pp. 25-30
Author(s):  
Piotr Szafranek
Keyword(s):  
Tetranychus Urticae ◽  
Spider Mite ◽  
Weather Conditions ◽  
Field Conditions ◽  
Potentilla Fruticosa ◽  
Growing Seasons ◽  
Deciduous Shrubs ◽  
Two Spotted Spider Mite ◽  
Tetranychus Urticae Koch

Abstract Potentilla fruticosa L. (Rosaceae Juss.) is one of the most popular deciduous shrubs cultivated in Poland. Among pests identified so far on P. fruticosa, a serious threat is caused by two-spotted spider mite Tetranychus urticae Koch (Acari: Tetranychidae). During three-year study, the occurrence of two-spotted spider mite T. urticae on four cultivars of P. fruticosa: ‘Goldfinger’, ‘McKay’s White’, ‘Uman’ and ‘Pink Beauty’ grown in field conditions was compared. While conducting experiment, weather conditions were monitored. The number of eggs and motile forms of two-spotted spider mite were recorded separately. The most attractive cultivar to spider mite was ‘Goldfinger’. The largest amount of motile forms of mites and their eggs were found on the leaves of this cultivar in all three years of study. The least number of pests occurred on the cv. ‘Pink Beauty’. However, differences in the abundance of this pest on all studied cultivars were variable during the growing seasons.

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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