Vol. 5, Issue 1 (2020)
Management of phytophthora species associated with citrus decline in Pakistan
Author(s): Zafar Iqbal, Salman Ahmad, Muhammad Asim, Abdul Rehman Malik, Abdul Rehman, Waqas Raza, Mohsin Raza, Saqib Bilal, Hafiz Umair Abid
Abstract: Different fungicides were evaluated against Phytophthora spp. Three concentrations 100, 200 and 300 ppm were used for each fungicide. Results showed that all fungicides significantly inhibited mycelial growth of P. nicotianae at 3rd, 5th and 7th day at different concentrations. Higher percent inhibition was given by Topsin-M, 58.3%, 56.4% and 51.3%, at 3rd, 5th and 7th day, respectively at concentrations 100-300 ppm. Least percent inhibition was given by Success 15.1%, 10.3% and 16.6%. Mycelial growth of P. citrophthora was also significantly inhibited by all fungicides at 3rd, 5th and 7th day at different concentrations. Topsin-M also showed best results and inhibited mycelial growth to 71.7%, 66.6%. Minimum percent inhibition was given by Copper oxychloride 22%, 15.6% and 9.3%, and Kumulus 16.9%, 8.3% and 7.3% at 100-300 ppm concentrations at day’s interval of 3, 5 and 7.