Alternaria alternata causing diseases

Stem end rot is the most destructive disease caused by Alternaria alternata YZU in pitayagrowing regions of Vietnam. This study was conducted to characterize antagonistic phosphatesolubilizing bacteria (PSB) from rhizosphere soil for their biocontrol activities against A. alternata YZU and evaluate the effect of temperature, pH, and water activity on that antagonism.

8p vispiderman 15-06-2023 9 1   Download

Alternaria brassicae, a necrotrophic pathogen, causes Alternaria Leaf Spot, one of the economically important diseases of Brassica crops. Many other Alternaria spp. such as A. brassicicola and A. alternata are known to cause secondary infections in the A. brassicae-infected Brassicas.

13p vijeeni2711 24-07-2021 7 0   Download

The objective of this study was to record the incidence of leaf blight of chrysanthemum caused by Alternaria alternata in Prayagraj city based on visual inspection and microscopic observation carried out during 2019-2020.

7p cothumenhmong11 11-05-2021 4 2   Download

Tomato is world’s one of the largest growing vegetable crop and ranks first among processing crops. It’s production suffers with many biotic and abiotic factors. Leaf blight disease caused by different species of Alternaria is one of the most dreadful diseases of tomato, causing huge economic losses. The present study was conducted in order to evaluate the efficacy of different fungicides against Alternaria alternata, one of cause for blight disease of tomato.

6p trinhthamhodang11 27-04-2021 25 1   Download

The present investigation aims ultimately to find out to management strategy for leaf spot of ber disease that suits agroclimatic conditions of the country. In the absence of stable management strategy, use of resistant varieties, against Alternaria leaf spot of ber is the only recommendation for the management of leaf spot of ber.

6p chauchaungayxua10 18-03-2021 7 2   Download

Leaf spot disease (Alternaria alternata) causes severe foliar damage to niger crop. The isolates of A.alternata were collected from different location and tested for their variability in term of morphological, cultural and pathological variation viz., growth rate, colony colour, aerial mycelium colour, growth pattern, sporulation, conidial size, conidial sepation. In case of growth rate Aa1 and Aa2 was observed very fast growing it cover 70- 73 mm growth within 7 days of inoculation on PDA media.

7p trinhthamhodang9 16-12-2020 14 2   Download

Brinjal is one of the important vegetable crops growing in India. Fruit rot brinjal caused by Alternaria alternata, Colletotrichum melongenae and Phomopsis vexans is one of the important diseases of brinjal. Hence, in this investigation, critical growth studies were done to understand the pathogen behaviour. The nutritional studies were taken up to know the best medium required for the growth and sporulation of the all three pathogens.

8p trinhthamhodang1215 23-09-2020 6 1   Download

Fruit rot of brinjal caused by Alternaria alternata is an important disease of eggplant inflicting heavy losses. The present investigation was carried out to test the efficacy of fungicides, botanicals and bio-agents in vitro. Among fungicides tested, tebuconazole, difenconazole showed 100 per cent mycelial inhibition of Alternaria alternata.

10p trinhthamhodang7 31-08-2020 9 2   Download

Early blight of potato caused by Alternaria alternata is one of the major diseases causing considerable yield loss. Efficacy of bio-agents was studied and revealed the all four Trichoderma species significantly reduced the mycelial growth of the pathogen over the control by dual culture method. Significantly maximum inhibition of mycelial growth was obtained with T. viride (57.08%) followed by T. azospirillum (50.00%), T. harzianum (43.26%) and T. virens (37.08%) of the pathogen after 48 hours of incubation. In present study, T. viride was observed more inhibitory against A. alternata...

6p kethamoi7 26-08-2020 11 2   Download

Pomegranate (Punica grantum L.) is a high value commercial horticultural crop grown extensively throughout Maharashtra. Among the different diseases on pomegranate Alternaria leaf and fruit spot caused by Alternaria alternata (Fr.) Keissler, is becoming a serious and emerging problem to growers in Maharashtra. Therefore, in present studies fungicides (six systemic, five non systemic and two combi fungicides) were tested in vitro against A. alternata.

7p angicungduoc5 12-06-2020 8 1   Download

A Alternaria leaf spot (ALS) and flower heads spot (FHS) disease of Heliconia rostrata plants is prevalent in India. Heliconias plants are known for their beautiful, brilliant colorful flowering bracts. Breathtaking and unusual flower heads (bracts) rise from clumps of banana like leaves, sometimes very large or slender. They are also known as the birds of paradise which are found mostly in Indian gardens. Symptomatic can be seen on the leaves and flower heads like to be small and circular spots with concentric rings at first which later became irregular lesions.

5p trinhthamhodang1213 02-06-2020 13 1   Download

Onion is an important crop grown worldwide for its culinary and medicinal properties. One of the major bottlenecks in its production is the foliar blight disease. The disease is responsible for causing huge losses in its successful production. Pathogens isolated from the onion foliar blight symptomatic leaves for two successive cropping seasons were Alternaria alternata, A. porri, A. tenuissima, Stemphylium vesicarium, Cladosporium allii-cepae and Colletotrichum circinans. However, the relative occurrence of the pathogens varied during the cropping season.

11p trinhthamhodang5 16-05-2020 12 1   Download

Leaf blight was observed in anthurium crop in Tamil Nadu and Kerala states of India during 2011-2012. Initially, the symptoms were small circular to irregular brown spots with concentric rings on the leaves that gradually enlarged. Fungal isolates, obtained from infected leaf tissues were grown in pure culture and on the basis of cultural and morphological characteristics and ribosomal DNA spacer sequences, the organism was identified as Alternaria alternata (Fr.) Keissler. To our knowledge this is the first report of Alternaria leaf blight disease in Anthurium andraeanum in India.

5p nguaconbaynhay5 16-05-2020 11 1   Download

Alternaria leaf spot caused by Alternaria alternata is one of the important foliar diseases of brinjal (Solanum melongena L.) The present study on severity of Alternaria leaf spot of brinjal in Kashmir valley was conducted during kharif 2016. An extensive survey was conducted in three districts of Kashmir valley viz., Anantnag, Baramulla, and Budgam revealed that disease was prevalent in all the three districts with mean disease incidence and intensity of 30.76 and 9.77 per cent, respectively. The maximum disease incidence of 38.68 and intensity of 14.

7p angicungduoc4 26-04-2020 13 0   Download

Biological control represents an important approach to manage plant diseases. Blights of leaf, panicle and fruits caused by Alternaria alternata and the wilt caused by Fusarium solani are important diseases of litchi. Hence, as an alternative to chemical fungicides, biological control by Trichoderma spp. to manage pathogens of litchi was explored. The aim of this study was to isolate native Trichoderma spp. from litchi orchard ecosystem and to evaluate antagonistic potential and its biological fitness so as to develop a commercial formulation for field application to manage litchi diseases.

16p quenchua4 06-04-2020 8 0   Download

Lehsua (Cordia myxa Roxb.), also known as Lasoda, Gunda and Indian cherry, is a major fruit of the family Boraginaceae. To manage the disease, efficacy of plant extracts and fungicides were tested in vitro and in vivo against Alternaria alternata, causing Alternaria leaf spot.

8p chauchaungayxua4 18-03-2020 8 1   Download

The present study was on identification of Alternaria alternata which responable for Alternaria leaf spot in Asalio. The disease was found to be very severe in all Asalio growing areas causing heavy destruction. The main aim of this study clearly demonstrated that A. alternata is a primary pathogen in Asalio, causing a leaf-spot disease. Isolates of Alternaria sp. were collected from leaf spot disease infected samples of Asalio in the fields around Udaipur.

5p chauchaungayxua4 18-03-2020 8 1   Download

Growing inclination towards Zero Budget Natural farming (ZBNF) in India to reduce expenditure on external input and to reduce indebtness of farmers, a study was under taken on evaluation of Jeevamrut, prepared by mixing cow dung, cow urine, pulse flour, jaggery and soil, and its constituents for management of Alternaria leaf spot caused by Alternaria alternata in organic mungbean under cage house condition as well as against the pathogen in-vitro, as the disease is quite destructive in all mungbean growing areas of southern Rajasthan.

12p caygaocaolon3 09-03-2020 15 1   Download

A leaf spot disease of Yucca plants is prevalent in India. They are native to the hot and dry parts of America and the Caribbean. Yucca is similar to agave but often forms trunks and typically has more numerous, thinner, leathery leaves with a smaller terminal spine. Yucca leaves range in color from deep green to pale blue, and leaves may be striped in shades of white, cream, yellow, or chartreuse. They are also used in pharmaceutical industries for medicinal properties When in flower yucca produces large, upright panicles (flower clusters) of white, bell-shaped flowers.

3p nguaconbaynhay1 04-12-2019 12 1   Download

Study on seed-borne nature of Alternaria alternata in chilli seeds indicated that in Standard blotter method, the incidence of A. alternata was 5.7 to 15.3% (average, 9.5%) and 16.5 to 28.4% (average, 21.7%) with unsterilzied seeds collected from general fields and diseased fields, respectively. The incidence for surface sterilized seeds from general and diseased fields were 2.6 to 7.2% (average, 4.9%) and 7.8 to 13.0% (average, 9.6%), respectively. In Agar plate method with Potato dextrose agar medium, the incidence of Alternaria alternata was 4.0 to 10.5% (average, 7.4%) and 11.0 to 24.

5p nguaconbaynhay1 04-12-2019 11 1   Download