Induction of resistance in tomato against buckeye rot (Phytophthora nicotianae var. parasitica)

Sharma, Adikshita; Shridhar, B. P.; Sharma, Amit; Sharma, Monica

doi:10.7202/1082505ar

Cited by 3 publications

(1 citation statement)

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“…Contact, combination, and systemic fungicides viz., mancozeb 75WP, carbendazim (12%) + mancozeb (63%) (Saaf), cymoxanil (8%) + mancozeb (64%) (Curzate M-8), tebuconazole 250EC (Folicur), botanicals such as Azadiractin 0.1%, garlic extract, and ready to use neem oil garlic soap, biocontrol agents namely, Trichoderma viride, Pseudomonas fluorescens, Bacillus subtilis, PGPR Mix-II and PGPM (both are microbial consortiums released from Kerala agricultural University) were selected for the study. The efficiency of chemical fungicides, botanicals, and biocontrol agents was tested using the poisoned food technique (Zentmeyer, 1955) [24] and dual culture technique (Skidmore and Dickinson, 1976). To calculate the percentage inhibition of mycelial growth in both methods, Vincent's formula (1927) was employed.…”

Section: Efficacy Of Fungicides Botanicals and Biocontrol Agents Agai...mentioning

confidence: 99%

Guarding the ridge gourd: Characterization and in vitro management of Phytophthora nicotianae causing fruit rot of Luffa acutangula in North Kerala

CK,

et al. 2024

Int. J. Adv. Biochem. Res.

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Fruit rot disease, a significant threat to ridge gourd cultivation, was prevalent in the North Zone of Kerala in 2019 from May to August. The prevalence of the disease was attributed to warm and humid climatic conditions, resulting in an incidence of 47 percent. This led to a devastating economic loss, accounting for 43.75 percent of the produce. Extensive studies encompassing symptomatology, cultural, morphological, and molecular characterisation were conducted to identify the causative pathogen, which was identified as Phytophthora nicotianae (Gen Bank Accession No. MK789292.1). In a bid to manage the disease, the efficacy of various fungicides, including mancozeb 75WP, carbendazim (12%) + mancozeb (63%) (Saaf), cymoxanil (8%) + mancozeb (64%) (Curzate M-8), and tebuconazole 250EC (Folicur), was assessed through in vitro experimentation. Remarkably, cent percent pathogen inhibition was achieved across different concentrations, demonstrating their promising potential. Furthermore, botanicals such as garlic extract, azadirachtin 0.1 percent (Neemazal), and ready-to-use neem oil garlic soap (Raksha) were evaluated. These botanicals exhibited varying levels of inhibition, with garlic extract displaying the highest efficacy at 77.77 percent, followed by azadirachtin at 22.22 percent and ready-touse neem oil garlic soap at 16.66 percent across different concentration ranges. Trichoderma viride and PGPM have emerged as strong contenders in investigating potential biological control agents, demonstrating complete inhibition against Phytophthora nicotianae. Additionally, Pseudomonas fluorescens and Bacillus subtilis exhibited 61.1 percent and 50 percent inhibition rates, while PGPR Mix-II exhibited an inhibition rate of 16.66 percent.

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Section: Efficacy Of Fungicides Botanicals and Biocontrol Agents Agai...mentioning

confidence: 99%

Guarding the ridge gourd: Characterization and in vitro management of Phytophthora nicotianae causing fruit rot of Luffa acutangula in North Kerala

CK,

et al. 2024

Int. J. Adv. Biochem. Res.

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Abiotic resistance inducers for management of bacterial wilt in tomato (Solanum lycopersicum L.)

Sood

Sharma

2023

J Plant Pathol

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Buckeye Rot of Tomato in India: Present Status, Challenges, and Future Research Perspectives

2022

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Tomato in India is commonly exposed to various diseases of fungal, bacterial, and viral origin, resulting in substantial yield losses (≥50%). Buckeye rot (caused by Phytophthora nicotianae var. parasitica) is among the major constraints in the successful cultivation of tomato crops in various parts of the world including the Solan district of Himachal Pradesh state, India. The fruit rot becomes more devastating under high humidity and wet soils. Symptoms generally appear on green fruit as alternate dark and light brown concentric rings. The genome size of P. nicotianae var. parasitica is 82 Mb with >23,000 predicted genes. High humidity (> 60%) and optimal temperatures (20-25 ºC), along with rainfall (≥ 10 mm), help to disperse the pathogen as the inoculum reaches the fruit through splashing rains. Sporangia germinate indirectly by producing zoospores at 20-25o C, or directly via germ tubes at >25ºC. In the absence of suitable resistant varieties, no single management practice is sufficient to keep the disease below the economic threshold level; therefore, integration of cultural and chemical methods is preferable. This paper aims to focus on the etiology, and management challenges of buckeye rot. We recommend innovative disease management strategies like identification and deployment of resistant cultivars as well as spraying of synthetic chemical fungicides, biocontrol agents, and use of abiotic chemicals that induce resistance, for developing sustainable crop production practices.

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Induction of resistance in tomato against buckeye rot (Phytophthora nicotianae var. parasitica)

Cited by 3 publications

References 25 publications

Guarding the ridge gourd: Characterization and in vitro management of Phytophthora nicotianae causing fruit rot of Luffa acutangula in North Kerala

Guarding the ridge gourd: Characterization and in vitro management of Phytophthora nicotianae causing fruit rot of Luffa acutangula in North Kerala

Abiotic resistance inducers for management of bacterial wilt in tomato (Solanum lycopersicum L.)

Buckeye Rot of Tomato in India: Present Status, Challenges, and Future Research Perspectives

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