Comparative effectiveness of fungicides, botanicals, nano-formulations and bio-control agents against Colletotrichum siamense and Neopestalotiopsis sp. causing anthracnose disease of guava Rabia, Arora Anita1,*, Kaur Amrinder, Buttar Daljeet Singh, Singh Harpreet1, Kaur Kirandee P1, Bhullar Kuldeep Singh2 Department of Plant Pathology, School of Organic Farming, Punjab Agricultural University, Ludhiana-141004 1Department of Fruit Science, School of Organic Farming, Punjab Agricultural University, Ludhiana-141004 2School of Organic Farming, Punjab Agricultural University, Ludhiana-141004 *E-mail: anitapau@pau.edu
Online published on 10 September, 2024. Abstract Anthracnose is one of the most serious and widespread diseases limiting guava farming success. Infection of growing flowers, immature and developed fruits results in qualitative and quantitative fruit loss. Keeping in view, an attempt has been made to manage the disease by exploiting the systemic and non-systemic fungicides, botanicals, nano-formulations and bio-control agents under in vitro conditions. The comparative efficacy of the fungicides, botanicals and bio-control agents for the management of anthracnose disease of guava was also investigated using foliar spray at University Seed Farm (USF), Ladowal, Ludhiana, in 2021 and 2022. Among various treatments evaluated for their inhibitory effect on the mycelial growth of Colletotrichum siamense and Neopestalotiopsis sp., 100 per cent mycelial growth inhibition was achieved with azoxystrobin 18.2% + difenoconazole 11.4% SC and tebuconazole 50% + trifloxystrobin 25% WG at 50 and 100 ppm concentrations under laboratory conditions. Azoxystrobin 18.2% + difenoconazole 11.4% SC and tebuconazole 50% + trifloxystrobin 25% WG exhibited low per cent disease index and provided significantly higher disease control as compared to other treatments under field conditions. Top Keywords Guava, Anthracnose, Colletotrichum siamense, Neopestalotiopsis sp., Fungicides, Botanicals, Bio-control agents, Nano-formulations, Management. Top |