Comparative effects of water spray and acaricides in control of Oligonychus sacchari (McGregor, 1942) in Khuzestan province

Subject Areas : entomology and othea arthropods

M.  Arbabi ¹ (Agricultural Acarology Laboratory, Department of Agricultural Zoology, Iranian Res. Inst. Plant Protection)
M. R.  Ghasemi ² (Dhbal-Khazaei agro-industry in Khuzestan province)
A.  Soraghi ³ (Dhbal-Khazaei agro-industry in Khuzestan province)
M. A.  Zarbakeshzadeh ⁴ (Dhbal-Khazaei agro-industry in Khuzestan province)

Received: 2012-06-30 Accepted : 2013-06-29 Published : 2015-02-20

Keywords:

Abstract :

Sugar cane spider mite (Oligonychus sacchari) is one of the major pests of this field crop in Khuzestan province. In concern to reduce environmental side effects of acaricides. an investigation was carried out to evaluate effectiveness of two consequent water spray, once water spray +once Abamectin applications within 48 hours with single application of fenpyroximate SC 5% against highly populated of active stages of sugarcane spider mite (Oligonychus sacchari) on two susceptible cane varieties (CP48, CP57) in Dhbal-Khazaei agro-industry in Khuzestan province during summer months of 2010. Samples were taken one day before and 3, 7, 15 and 25 days after treatments. The effects of water spraying in control of quantities and qualities damages caused by spider mites on sugar cane plants, determined by weighting and counting number of leaves before and after treatments. Henderson-Tilton formula used for analyses of mortalities percent with help of SAS and compared mean of treatments with DMRT method respectively. The highest mean of active mite stages recorded 10.35 on 2cm2 lower part of underside sugar cane leaf and maximum leaves infested% recorded 77.75% for CP-48 variety. Max and Min treatments effects' observed for fenpyroximate and two time water spray on CP-57 and CP-48 var. respectively. Increasing control effects up to 25 days observed for all treatments. Water spraying in control of mite damages increased 74% weight of treated sugarcane plants along with 36% of new leaves formed for both sugarcane varieties. Two consequent water sprays at 24 hours intervals being more effective if applied at initial spider mite population. This method also keeps natural enemies safe and can be use for sustainable sugar cane mite pest control.