scholarly journals Appearance Time of Diapausing Females and Termination of Diapause in the Two-spotted Spider Mite, Tetranychus urticae KOCH and the Kanzawa Spider Mite, Tetranychus kanzawai KISHIDA on Pear Tree in Tottori District (Acarina: Tetranychidae)

1980 ◽  
Vol 24 (3) ◽  
pp. 175-183 ◽  
Author(s):  
Masato UCHIDA
Keyword(s):  
Tetranychus Urticae ◽  
Spider Mite ◽  
Tetranychus Kanzawai ◽  
Appearance Time ◽  
Pear Tree ◽  
Two Spotted Spider Mite ◽  
Tetranychus Urticae Koch

scholarly journals Effects of local isolates of Beauveria bassiana (Balsamo) Vuillemin on the two-spotted spider mite, Tetranychus urticae (Koch) (Acari: Tetranychidae)

2021 ◽  
Vol 31 (1) ◽  
Author(s):  
Cenk Yucel
Keyword(s):  
Tetranychus Urticae ◽  
Beauveria Bassiana ◽  
Spider Mite ◽  
Lethal Effect ◽  
Probit Analysis ◽  
Plant Feeding ◽  
Wide Range ◽  
Two Spotted Spider Mite ◽  
Short Time ◽  
Tetranychus Urticae Koch

Abstract Background The two-spotted spider mite, Tetranychus urticae (Koch) (Acari: Tetranychidae), is a widely distributed plant-feeding pest that causes significant yield losses in a wide range of crops. Newly developed or improved environmentally friendly biocontrol agents serve as an alternative to traditional pest control tools. Experiment of the effects of 2 local fungal isolates of Beauveria bassiana (BGF14 and BCA32) was carried out against T. urticae under laboratory conditions. Results Both tested isolates had lethal effect in a short time after application, and this effect increased as time progressed. BGF14 and BCA32 isolates caused T. urticae mortality rates ranging from 25.88 to 61.92 and 32.36 to 62.03% when applied at the concentrations between 1×105 and 1×108 conidia/ml, respectively. According to the Probit analysis performed on the effect of fungi on T. urticae adults, the LC50 values of BGF14 and BCA32 isolates on the 7th day after inoculation were 2.6×106 and 6.3×104 conidia/ml, respectively, and the LT50 values for both fungi applied at a concentration of 108 conidia/ml were 2.14 and 2.23 days, respectively. Conclusions The 2 isolates of B. bassiana (BGF14 and BCA32) had the potentials to suppress T. urticae population and can be recommended as promising biocontrol agent candidates for control of T. urticae.

Population Dynamics of Two Spotted Spider Mite Tetranychus Urticae Koch in Okra

2021 ◽  
Vol 83 (2) ◽  
pp. 280-281
Author(s):  
Nasreen ◽  
S Sridharan ◽  
M Muthukumar ◽  
K Ashok
Keyword(s):  
Population Dynamics ◽  
Tetranychus Urticae ◽  
Spider Mite ◽  
Two Spotted Spider Mite ◽  
Tetranychus Urticae Koch
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