Occurrence of Diseases in Floricultural Crops in and around Jorhat, Assam

Abstract

The objective of this study was to identify pathogenic diseases of economically important floricultural crops based on visual inspection and microscopic observation carried out during 2017-18 in and around Jorhat district of Assam. During the investigation, 3 diseases of chrysanthemum (2 fungal, 1 viral); 3 diseases of gladiolus (all fungal); 5 diseases of gerbera (all fungal), 2 diseases of rose (all fungal) and a fungal disease of marigold was identified. The diseases identified in chrysanthemum were alternaria leaf spot, sooty mould and mosaic disease. The diseases identified in Gladiolus were fusarium infection, alternaria leaf spot, curvularia leaf spot and corm rot. The diseases identified in gerbera were alternaria leaf spot, cercospora leaf spot, damping off, stemphylium infection and coniothyrium infection. Diseases identified in rose were alternaria leaf spot and cercospora leaf spot. In marigold, alternaria leaf spot was indentified causing infection to the crop. Overall pathogenic disease incidence of flower crops recorded as 60.41% in Chrysanthemum, 45.83% in Gladiolus, 55.55% in gerbera, 47.22% in rose and 45.83% in marigold. Area wise maximum disease incidence (61.11%) was observed in Borbheta area followed by Bahona(58.33%). Lowest disease incidence was recorded in Sungi (27.77%) in Jorhat district. Gladiolus (Gladiolus grandiflorus L.) belongs to the family Iridaceae and native to Europe, Mediterrenean region and South Africa. It is also known as queen of bulbous ornamental Disease incidence, floricultural crops, survey, pathogenic diseases, microscopic observation Keywords:

Precision Agriculture Digital Technologies for Sustainable Fungal Disease Management of Ornamental Plants

“…Fungal diseases affect the production of all most common flowers. A study carried out in 2017-18 in India investigated the occurrence of pathogenic diseases of economically important floricultural crops, highlighting an incidence of fungal infections of 57% in chrysanthemum, 56% in gerbera, 47% in rose, 46% in gladiolus, and 46% in marigold [61]. The early detection of pathogens, also through digital tools, is the only option to tackle these significant losses and achieve a sustainable ornamental production.…”

Growth trend and potential of horticulture in Northeast India

“…The state has recorded 9.1% per annum growth in the area under spice cultivation and a 19% annual growth rate in production. The average yield of the major spices, i.e., ginger, turmeric, chilli, and black pepper has increased over the years in the state (Borah, 2020). However, the instability index of 20.29% and 27.86% for the area under cultivation and production respectively indicate moderate instability which can be mitigated through strategic planning and correct policy interventions.…”

An Overview on Fungal Diseases in Angiospermic Plants

“…These diseases affect the development of crops and create more loss in economy. The most common disease is Fusarium oxysporum chrysanthemi, Alternaria leaf spot, sooty mould found in Chrysanthemum plants and these diseases were also identified in other crops as well [41].…”