Investigation of stem gall disease prevalence in coriander in Humid South-Eastern plain Zone-V of Rajasthan

Production of coriander is affected by many biotic and abiotic factors. Among them, diseases have been identified as significant limiting factors caused by fungi, bacteria, and viruses. Stem gall caused by the fungus Protomyces macrosporus Unger is the most prevalent and damaging disease of coriander. The field survey of stem gall disease of coriander (Coriandrum sativum L.) caused by Protomyces macrosporus Unger in Humid South Eastern Plain Zone-V of Rajasthan was conducted at five locations in each district viz., Kota, Baran and Jhalawar district for recording incidence and intensity of disease during Rabi 2021-22. The maximum stem gall disease incidence was recorded in Ramganj Mandi (70%) of Kota district, followed by incidence in Kalya Khedi (60%) of Kota and incidence in Shahbad (60%) of Baran district. In contrast, minimum stem gall disease of coriander incidence was observed in Kanwas (25%) of the Kota district, followed by Gopalpura village (35%) of the Baran district. The maximum per cent disease intensity (PDI) of stem gall disease was observed in Ramganj Mandi (47.5%) of Kota district, followed by stem gall disease PDI in Shahbad (37.5%) and Anta (32.5%) of Baran district. The minimum PDI was recorded in Kanwas (10.0%) of Kota district, followed by Nadi Khod village (12.5%) and Jarga village (15.0%) of Jhalawar district and Gopalpura (15.0%) of Baran.