scholarly journals Acaricidal activity of Chrozophora oblongifolia on the two spotted spider mite, Tetranychus urticae Koch

2017 ◽  
Vol 9 (3) ◽  
pp. 23-28 ◽  
Author(s):  
Elhosieny Mostafa Mohamed ◽  
Mohamed Alshamy Maha ◽  
Abdelmonem Ahmed ◽  
Abdel-Mogib Mamdouh
Keyword(s):  
Tetranychus Urticae ◽  
Spider Mite ◽  
Acaricidal Activity ◽  
Two Spotted Spider Mite ◽  
Tetranychus Urticae Koch

Composition and acaricidal activity of Lippia sidoides essential oil against two-spotted spider mite (Tetranychus urticae Koch)

2010 ◽  
Vol 101 (2) ◽  
pp. 829-832 ◽  
Author(s):  
S.C.H. Cavalcanti ◽  
E. dos S. Niculau ◽  
A.F. Blank ◽  
C.A.G. Câmara ◽  
I.N. Araújo ◽  
...  
Keyword(s):  
Essential Oil ◽  
Tetranychus Urticae ◽  
Spider Mite ◽  
Acaricidal Activity ◽  
Lippia Sidoides ◽  
Two Spotted Spider Mite ◽  
Tetranychus Urticae Koch

scholarly journals Acaricidal Activity of Nano-Abamectin Against the Two-Spotted Spider Mite; Tetranychus Urticae Koch (Acari: Tetranychidae)

2019 ◽  
pp. 81-86
Author(s):  
Khaled Y. Abdel-Halim ◽  
Fatma Sh. Kalmosh
Keyword(s):  
Fourier Transform ◽  
Electron Microscope ◽  
Tetranychus Urticae ◽  
Spider Mite ◽  
Acaricidal Activity ◽  
Spherical Particles ◽  
Transmission Electron ◽  
Soybean Plants ◽  
Two Spotted Spider Mite ◽  
Tetranychus Urticae Koch

The efficiency of prepared nano-abamectin was assayed against two-spotted spider mite, Tetranychus urticae (Koch). Prepared formulation showed spherical particles ranged from 66 to 133 nm under examination of Transmission Electron Microscope (TEM) and same pattern of Fourier Transform Infrared (FTIR) spectrum in comparison of conventional acaricide (Vertimecâ). In laboratory trail, toxicity index at LC50 level confirmed that nano-abamectin was greater toxic to adult female, T. urticae (Koch) with value; 30 than Vertimecâ 1.8% EC. Similarly, nano-abamectin reduced the mite fecundity at levels greater than those of Vertimecâ. Regarding field trail, nano-abamectin at rate of 60 ml/ha showed very toxic effects after 3 day of spraying followed by 7 and 14 days on soybean plants achieving % of mortality; 89.98, 83.80 and 76.90%, respectively. These findings showed that, bioactivity of nano-acaricide were many folds higher than conventional acaricide against mite, T. urticae (Koch). However, the biosafety issues may be also addressed.

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.

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