N. Kiran Kumar

University of Agricultural Sciences, Bangalore | UAS · Department of Plant Pathology (College of Agriculture Mandya)

Rice (Oryza sativa L.) is one of the most important cereal crops in the world. Sheath blight disease of rice caused by Rhizoctonia solani Kuhn AG-1 IA (Telomorph, Thanatephorus cucumeris Frank. Donk) is a devastating disease in all rice-growing regions of the world. The yield losses ranging from 4-50% have been reported depending on the crop stage...

Among the various disease of rice, sheath blight caused by Rhizoctonia solani Kuhn has become one of the major fungal diseases covering different rice growing ecosystem of Cauvery command area of Karnataka. Roving disease survey was conducted during Kharif-2022 to know the occurrence and spread of sheath blight disease in Cauvery command area of Ka...

Paddy is the second crop where huge amounts of chemicals are used for production, majorly for disease control. To avoid excess use of chemicals in the rice fields and also to find the best alternative solution to fungicides for sheath blight disease caused by Rhizoctonia solani, research was carried out by using various bioagents, plant extracts an...

A study was done to explore the various strategies to manage the sheath blight of rice. During kharif 2018 and 2019, different treatments viz., foliar and soil application of Trichoderma viride, Pseudomonas fluorescens, mustard, and radish leaf and their combination were applied at 30 and 60 days after transplanting (DAT). The parameters such as di...

Papaya (Carica papaya L.) is a tropical fruit having commercial importance because of its nutritive and medicinal value. One of the reason for the low yiled of papaya is due to the infection of Asperisporium caricae which causes black spot disease both on leaves and fruits and responsible for both pre and post harvest losses of fruits. As this dise...

Plant extracts due to its antimicrobial property can effectively inhibit the growth of the pathogen and eco-friendly in nature, whereas microbial antagonists have shown greater potential in substituting the synthetic fungicides for the control of postharvest decay of fruits. Among the seven plant extracts and five cultural filtrate of bioagents tes...

By considering the major upcoming disease in rice growing areas, that is sheath blight in rice, caused by Rhizoctonia solani Kuhn and the huge chemicals used in rice production, including disease management, research was carried out at the College of Agriculture, V. C. Farm, Mandya, during Kharif 2020-21, in order to develop a new non-chemical stra...

The study was conducted to evaluate new insecticide molecules for the management of paddy earhead bug in field condition at College of Agriculture, V. C. Farm, Mandya, University of Agricultural Sciences Bangalore during kharif 2020. Nine different insecticides and one untreated control were evaluated. Number of earhead bugs per hill at day before...

Inhibitory effect of few cruciferous plant extracts were tested by poisoned food technique. At 1:1 dilution the highest inhibition of 51.1% was observed in cabbage and the least inhibition of 21.93% over control was observed in case of radish. At 1:100 and 1:1000 dilutions none of the plants extracts were effective against Rhizoctonia solani. At 1:...

Post flowering stalk rot of maize caused by Fusarium verticillioides is the major disease and the occurrence of variability in the pathogen is one of the key factors for difficulty in management of the disease. The effect of temperature regimes showed the maximum radial growth and highest sporulation was obtained at 30℃ by all six isolates of F. ve...

Powdery mildew caused by Phyllactinia corylea (Pers.) Karst, is an obligate parasitic disease of mulberry inflicting considerable qualitative as well as quantitative losses of leaf yield. Screening of 16 mulberry varieties against powdery mildew disease under field conditions yielded two resistant varieties with the lower powdery mildew disease sev...

Papaya is affected by several diseases like, foot rot, anthracnose, powdery mildew, black spot, brown spot, papaya ring spot, mosaic and leaf curl diseases. Among them black spot disease caused by Asperisporium caricae is emerging as an important one in limiting papaya prodiction. A random survey was conducted during September to November months of...

Among the seven bio agents evaluated in the experiment by following dual culture technique T. viride (72.59%) exhibited highest mycelial inhibition, followed by T. asperellum (70.37%), T. harzianum (64.81%), Ampelomyces quisqualis (63.33%), antagonistic bacteria Bacillus subtilis (9.63%), P. fluorescens (6.67%) whereas, least inhibition was observe...

Mulberry Alternaria blight (Alternaria alternata) is one of the foliar devastating diseases and reduces leaf quality and yield. Studying the cultural characters of the pathogen is the first and most important basic step in identification process. The results of cultural studies revealed that PDA was the best medium for supporting the good radial gr...

Plant extracts for the control of plant diseases are emerging as an alternative to conventional fungicides as they are generally safe to humans and environment friendly. Seven plant extracts were tested for post-harvest management of papaya black spot disease caused by Asperisporium caricae under in vivo condition. Among all the seven plant extract...

In-vitro evaluation of fungicides against root rot of Capsicum caused by Sclerotium rolfsii and the physiological studies of the fungi were done. Among the five different media tested, suitable for mycelial growth and sclerotial production, PDA proved to be the best medium for mycelial growth of Sclerotium rolfsii followed by Czapek's and Corn meal...

Study on assessing the residual toxic effect of fungal and bacterial bio agents used against powdery mildew of mulberry on silkworms was conducted. The results of the toxicological studies on growth, development and cocoon parameters revealed that, Trichoderma harzianum had positive effect on both larval weight and its length with increase of 21.46...

Sheath blight of rice caused by Rhizoctonia solani has become a major constraint in rice production in India. The efficacy of cruciferous plant extracts were assessed against R. solani in laboratory conditions. Inhibitory effect of few cruciferous plant extracts were tested by poisoned food technique. At 1:1 dilution the highest inhibition of 51.1%...

Cabbage is considered as the fifth most important vegetable crop in India and major constraint in its production is black rot caused by Xanthomonas campestris pv. campestris (Xcc). The management of the disease is difficult and the chemicals are least effective and are hazardous. Hence, a study was carried to test the potentiality of few medicinal...

Among the foliar diseases affecting maize, Turcicum leaf blight (TLB) caused by Exserohilumturcicum is of worldwide importance. In our study, a total of 135 maize genotypes were screenedfor two years during Kharif season (2014 and 2015) against TLB at Zonal Agricultural ResearchStation, VC Farm, Mandya. The mean result of two years screening data o...

Bacterial diseases of plants are highly catastrophic and management is difficult. Using ofchemicals are hazardous. Hence, an alternate method of control needs to be developedwhich is effective, cheap and eco-friendly. The water extract from the two botanicals viz.,Ocimum gratissimum and Tylophora asthmatica were effective in inhibiting the growth o...

The different medicinal plant extracts applied against mulberry powdery mildew were tested for their effect on growth and development of silkworm, cocoon and silk quality parameters. It was found that when treated leaves were fed one day after treatment highest larval mortality (25.00%) was recorded in Azadirachta indica extract at 15 percent but i...

Sorghum downy mildew has long been recognized as a destructive disease on maize and sorghum, throughout the world. The disease caused by Peronosclerospora sorghi. The impact of SDM in maize on yield and yield parameters were assessed under field conditions by using genotype CM 500, a known susceptible check and a resistant check Hema. In unprotecte...

The various methods used for managing rice disease includes, use of resistant varieties, cultural practices, biological and chemical control. All these methods have varied degrees of success in managing rice diseases. The most important control tactics used worldwide includes use of resistant varieties and chemical control. Efforts are made develop...

Sheath blight disease has become a major threat in rice cultivation throughout India. Management of sheath blight is difficult due to soil borne nature of the pathogen and non availability of resistant varieties to the disease. Use of fungicides is the only effective option in the management of the disease. Therefore, three different field evaluati...