Himachal Journal of Agricultural Research

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Determining Resistance Level to Acaricides in Field Populations of Two Spotted Spider Mite, Tetranychus urticae in Himachal Pradesh


Affiliations
1 Department of Entomology, CSK Himachal Pradesh Krishi Vishvavidyalaya, Palampur - 176 062, India
 

Two spotted spider mite, Tetranychus urticae Koch (Acari: Tetranychidae) is highly polyphagous and cosmopolitan pest attacking wide range of crops, limiting the yield and thus, cause huge economic losses. Mite abundance is increasing in spite of using acaricides in Himachal Pradesh which may be attributed to acaricidal resistance in mites. Studies on T. urticae populations collected from six localities were undertaken during 2018-19 against three acaricides, namely, fenazaquin, hexythiazox and propargite. The studies revealed that resistance development was there among field populations collected from different localities. The resistanc for fenazaquin, hexythiazox and propargite were in range of 3.62 to 4.26, 1.88 to 2.45 and 3.47 to 5.63, respectively. The Una population was found most resistant to all the acaricides followed by Kullu and Solan. The Palampur population was observed to be least resistant to acaricides.

Keywords

Tetranychus urticae, Resistance, Acaricides.
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  • Determining Resistance Level to Acaricides in Field Populations of Two Spotted Spider Mite, Tetranychus urticae in Himachal Pradesh

Abstract Views: 181  |  PDF Views: 1

Authors

Titiksha
Department of Entomology, CSK Himachal Pradesh Krishi Vishvavidyalaya, Palampur - 176 062, India
A. K. Sood
Department of Entomology, CSK Himachal Pradesh Krishi Vishvavidyalaya, Palampur - 176 062, India

Abstract


Two spotted spider mite, Tetranychus urticae Koch (Acari: Tetranychidae) is highly polyphagous and cosmopolitan pest attacking wide range of crops, limiting the yield and thus, cause huge economic losses. Mite abundance is increasing in spite of using acaricides in Himachal Pradesh which may be attributed to acaricidal resistance in mites. Studies on T. urticae populations collected from six localities were undertaken during 2018-19 against three acaricides, namely, fenazaquin, hexythiazox and propargite. The studies revealed that resistance development was there among field populations collected from different localities. The resistanc for fenazaquin, hexythiazox and propargite were in range of 3.62 to 4.26, 1.88 to 2.45 and 3.47 to 5.63, respectively. The Una population was found most resistant to all the acaricides followed by Kullu and Solan. The Palampur population was observed to be least resistant to acaricides.

Keywords


Tetranychus urticae, Resistance, Acaricides.

References