• MUTHUKUMAR ARJUNAN
• Thangavel Sivakumar1
• Ramasamy Naveenkumar2
• Kaliyaperumal Sanjeevkumar1
• Udhayakumar Ragunathan1

Anthracnose or “Bird’s eye spot” of grapes (Vitis vinifera L.) caused by Elsinoe ampelina (de Bary) Shear, is widespread and the most destructive disease in the vineyards. The disease appears from the early stages of crop growth and causes long lasting effect on the vine growth and yield potential of the crop if proper management is not adopted in time. The disease affects all the aerial parts in the green stage; mostly on the new shoots and fruits. In the present study aimed to test the efficacy of new molecules of fungicides for the control of grapes anthracnose. The results of the present study revealed that the average disease severity on leaves varied from 13.3 to 17.5 per cent and in inflorescence 0.7 to 1.4 per cent in different treatments compared to 58.7 and 20.1 per cent in untreated control. Among these, T2- TWG1 70 WG @ 500 g a.i/ha was found to be the most effective by recording 77.3 per cent reduction in leaves and 96.5 per cent reduction in inflorescence at the end of third application. The incidence of anthracnose disease on branches was completely absent and no defoliation was observed from the infected plants. With regard to the yield parameters tested, T2-TWG1 70 WG @ 500 g a.i/ha recorded significantly more number of berries/bunch (119.6), maximum bunch weight (315.8 g), increased berry weight (3.1 g) and highest marketable fruit yield of 7.7 kg/vine which is at par with T1-TWG1 70 WG @ 400 g a.i/ha (116.3; 307.6 g; 2.9 g ; 7.6 kg). TWG1 70 WG @ 1000 and 2000 g a.i./ha dose rates tested for its phytotoxicity studies did not produce any phytotoxic symptoms on grapes.

Thiophanate Methyl, Elsinoe ampelina, disease incidence, phytotoxicity

"BIO EFFICACY AND PHYTOTOXICITY EVALUATION OF TWG1 70WG (THIOPHANATE METHYL) AGAINST ANTHRACNOSE DISEASE IN GRAPES", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.6, Issue 1, page no.516-524, January-2019, Available :http://www.jetir.org/papers/JETIR1901B67.pdf

"BIO EFFICACY AND PHYTOTOXICITY EVALUATION OF TWG1 70WG (THIOPHANATE METHYL) AGAINST ANTHRACNOSE DISEASE IN GRAPES", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.6, Issue 1, page no. pp516-524, January-2019, Available at : http://www.jetir.org/papers/JETIR1901B67.pdf