EFFECT OF ACARICIDES ON Calepitrimerus vitis (Nalepa, 1905) (ACARI: ERIOPHYIDAE) AND ON THE PRODUCTION OF VINEYARDS

Paulo Ricardo Ebert Siqueira,Marcos Botton,Lucas Da Luz Soares,Giovani Silveira Peres,Paulo Ricardo Baier Siqueira

doi:10.1590/0100-29452016494

Abstract

ABSTRACT The southernmost region of the state of Rio Grande do Sul, Brazil, has emerged as one of the major poles for fine grape production (Vitis vinifera) for wine processing. In this region, grapevine rust mite (Calepitrimerus vitis) is one of the major pests for the culture; however, information is lacking about production losses caused by this species and acaricides for its control. In this paper, the acaricide effect of azadarachtin, boron + nitrogen on orange peel oil, sulfur and spirodiclofen on C. vitis on Merlot cultivar commercial grapevine was evaluated and production losses caused by the presence of the mite were estimated. The experiment was conducted during the 2012/2013 and 2013/2014 growing seasons, comparing the infestation levels of C. vitis and phytoseiid mites on plants treated with acaricides by the use of sticky traps. The acaricides evaluated caused a significant drop in the population of C. vitis, and spirodiclofen was the most effective, followed by sulfur, while boron + nitrogen and azadarachtin were the less effective. The products evaluated did not affect the phytoseiid population present in the experimental area. The grape production in parcels treated with spirodiclofen was significantly greater (7.430 ± 871kg.ha-1) than in the uncontrolled parcel (6.074 ± 316kg.ha-1). Significant differences in the total sourness, pH, sugar percentage, and total sugar content of grapes between treated parcels and control were not observed. The control of C. vitis with spirodiclofen and sulfur is effective to reduce losses on yield and will not affect the population of Phytoseiids. The control of C. vitis should be carried out at the beginning of infestation with rotation of active ingredients.

Highlights

The southernmost region of the state of Rio Grande do Sul has emerged as one of the major poles for fine grape production (Vitis vinifera) for wine processing (MELLO; MACHADO, 2013)
These acaricides are selective to Neoseiulus californicus (McGregor, 1954) (Acari: Phytoseiidae) (SIQUEIRA, 2012b), which is the main species of predatory mite present in the culture (JOHANN; FERLA, 2012)
This study aimed to evaluate acaricides for the control of C. vitis and evaluate the production of Vitis vinifera plants in the southernmost region of the state of Rio Grande do Sul

Summary

Introduction

The southernmost region of the state of Rio Grande do Sul has emerged as one of the major poles for fine grape production (Vitis vinifera) for wine processing (MELLO; MACHADO, 2013). In this region, grapevine rust mite Vitis Calepitrimerus (NALEPA, 1905) (Acari: Eriophyidae) has been mentioned as one of the main pests of this culture (KLOCK et al, 2011), which has been reported in other producing countries (BERNARD et al, 2005; Walton et al, 2007, 2010). As a result of this practice, economic losses may be occurring in many vineyards due to the absence of C. vitis control and / or unnecessary expenses by the use of acaricides without the corresponding economic return of the treatment cost

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Conclusion