TY - JOUR AU - R. Suseela Bhai, K.B. Vinitha, M. Anandaraj and PY - 2016/08/18 Y2 - 2024/03/29 TI - Virulence of Phytophthora isolates from Piper nigrum L. and their sensitivity to metalaxyl-mancozeb JF - Journal of Plantation Crops JA - JPC VL - 44 IS - 2 SE - Research Articles DO - 10.19071/jpc.2016.v44.i2.3100 UR - https://updatepublishing.com/journal/index.php/JPC/article/view/3100 SP - AB - <p>Foot rot disease caused by <em>Phytophthora capsici</em> in black pepper is the most destructive disease. A total of 82 isolates from the National Repository of <em>Phytophthora</em> at ICAR-Indian Institute of Spices Research were evaluated for their sensitivity to metalaxylmancozeb and also tested for their virulence. Of the 82 isolates studied, 19 (23.2%) were highly sensitive to metalaxyl-mancozeb and six (7.3%) were comparatively insensitive (EC<sub>90</sub> value &gt;40 ppm; range 41.3 to 68.5 ppm). The isolates also varied in the degree of virulence, viz., 34 (41.5%) were highly virulent, 39 (47.6%) moderately virulent, 4 (3.7%) mildly virulent, and 5 (6.1%) non-virulent. There was neither any significant correlation between sensitivity to metalaxyl-mancozeb and virulence nor with the geographical location<strong>. </strong></p> ER -