Sensitivity of different fungicides against isolates of Alternariaster helianthi (Hansf) Tubaki and Nishihara, leaf blight in sunflower

Usha, D. S.; Sarada, C.

doi:10.1007/s42360-018-00109-2

Cited by 2 publications

(2 citation statements)

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“…Based on its constituent compounds, propiconazole belongs to the triazole fungicide, which inhibits fungal growth by inhibiting sterol biosynthesis, an essential component in fungal cell defense (Rouabhi 2010). Propiconazole can inhibit the growth of C. beticola (Hudec et al 2020) and A. helianthi (Usha et al 2019). Evaluated for mycelial growth and conidial germination can determine the sensitivity of pathogenic fungi to fungicides.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of several fungicides on mycelial growth and conidial germination of Alternaria species causing leaf spots in sunflowers under in vitro conditions

MULJOWATI

Hikam

2023

Asian J Agric

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Abstract. Muljowati J, Hikam AR. 2023. Evaluation of several fungicides on mycelial growth and conidial germination of Alternaria species causing leaf spots in sunflowers under in vitro conditions. Asian J Agric 7: 47-51. Alternaria leaf spot caused by Alternaria species is the most destructive disease of sunflowers. Fungicides, such as mancozeb, carbendazim, benomyl, propiconazole, and iprodione, are commonly used to control diseases. However, the continuous use of synthetic fungicides can cause pathogen resistance to these fungicides. Therefore, the aim of this study was to conduct an in vitro test on the effect of fungicides, such as benomyl, carbendazim, mancozeb, iprodione, and propiconazole, on the mycelial growth and germination of conidia of Alternaria species causing leaf spot on sunflower. The experiment was performed in a completely randomized design with factorial patterns. The first factor was the type of fungicide, namely benomyl, mancozeb, iprodione, carbendazim, and propiconazole. The second factor was the concentration level of the (0%, 25%, 50%, 75%, 100%, and 125%) recommended dose. Data were Analyzed of Variance (ANOVA) using SPSS 18 version. The results showed that Alternaria species were resistant to carbendazim (32.98%) and benomyl (40.32%). It also shows an intermediate level of resistance to mancozeb (62.59%), iprodione (65.38%), and sensitivity to propiconazole (78.38%). Based on the research results, the authors suggest sunflower farmers use propiconazole to control Alternaria species. However, such fungicides may trigger the use of fungicides with higher doses than the recommended dose. That led to the emergence of Alternaria species resistant to the fungicides benomyl, carbendazim, mancozeb, and iprodione.

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Section: Introductionmentioning

confidence: 99%

Evaluation of several fungicides on mycelial growth and conidial germination of Alternaria species causing leaf spots in sunflowers under in vitro conditions

MULJOWATI

Hikam

2023

Asian J Agric

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“…As there is no resistant variety available for this disease, it is essential to use the fungicides to manage this disease. Many commonly used fungicides such as vitavax, captan, dithane Z-78, fytolan, thiride and benlate failed to provide satisfactory control of severe incidence of leaf blight under field conditions, especially during the rainy season (Mukewar and Gera, 1980). Hence, this experiment was taken up with combi fungicides to find out new effective and cheaper fungicides for management of this disease.…”

Section: Introductionmentioning

confidence: 99%

Management of Alternaria Leaf Spot using Available Fungicides (Combi Products) in Sunflower

Venkataramanamma,

Prabhakar,

Neelima

et al. 2023

IJARe

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Back ground: Alternariaster leaf blight caused by Alternariaster helianthi is an important disease on sunflower, caused yield losses upto 80%. It is seed and air borne. Management of this disease is very important to avoid yield losses, hence, this experiment was planned with available fungicides (combi products) in the market. Methods: A field experiment was carried out on management of Alternariaster leaf spot disease for three years i.e., kharif 2018, 2019 and 2020 at RARS, Nandyal under AICRP on Sunflower scheme. Seven treatments were imposed in three replications with different fungicides by using the hybrid KBSH-44 in RBD design. Result: Pooled analysis results indicated that among different treatments, the treatment T3: (Seed treatment with carbendazim 12% + mancozeb 63% wp @ 2g/kg seed followed by two foliar sprays with Trifloxystrobin 25%+ tebuconazole 50% (Nativo 75WG)@ 0.25g/l) has recorded low severity (PDI) of 37% with higher yield of 1382 kg/ha, which was followed by the treatment T1 (Seed treatment with carbendazim 12% + mancozeb 63% WP (SAAF 75 WP) @ 2g/kg seed followed by two foliar sprays with difenconazole 25% + propiconazole 25% (TASPA 500EC) @ 0.3 ml/l) has recorded disease severity (PDI) of 40.95% and yield of 1363 kg/ha, where as control recorded high PDI of 53.38% and lower yield of 1200 kg/ha. Regarding B:C ratio, the treatment T1 recorded high B:C ratio i.e., 1.65, followed by T4 and T3 recorded 1.59 and 1.57 respectively. Hence, it was concluded that above three treatments were recommended for disease management as they are on par with each other and recorded more B:C ratio than others.

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Sensitivity of different fungicides against isolates of Alternariaster helianthi (Hansf) Tubaki and Nishihara, leaf blight in sunflower

Cited by 2 publications

References 3 publications

Evaluation of several fungicides on mycelial growth and conidial germination of Alternaria species causing leaf spots in sunflowers under in vitro conditions

Evaluation of several fungicides on mycelial growth and conidial germination of Alternaria species causing leaf spots in sunflowers under in vitro conditions

Management of Alternaria Leaf Spot using Available Fungicides (Combi Products) in Sunflower

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