Studies on biology and environmental factors affecting the development of tomato powdery mildew under protected cultivation

Rana, Arushi; Malannavar, Anudeep B; Banyal, D. K.

doi:10.1007/s42360-018-0049-4

Cited by 4 publications

(3 citation statements)

References 18 publications

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“…Further, observations on germ-tube length showed that there was huge difference in germ-tube length which ranged between 0.10 to 27.91 µm. These findings are in accordance with Rana et al (2018) who reported that high relative humidity was required for the germination of conidia of S. fulginea. The analysis of meteorological factors and infection of powdery mildew on summer squash showed that the disease initiates in second fortnight of May and attained maximum level in July (Fig 1).…”

Section: Collection Of Samples and Identification Of Pathogensupporting

confidence: 93%

Morphological characterization and epidemiological studies of summer squash (Cucurbita pepo) powdery mildew

et al. 2021

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Samples of powdery mildew of summer squash (Cucurbita pepo L.) collected from Solan, Shimla, Hamirpur and Kinnaur districts of Himachal Pradesh during 2017-18 revealed the presence of anamorphs, whereas the cool and dry temperate region of district Kinnaur showed the occurrence of both teleomorphic and anamorphic stages of powdery mildew on summer squash. Present studies constitute the first report of cleistothecial occurrence on summer squash under Indian conditions. Based on anamorphic characters like ellipsoidal conidia, presence of fibrosin bodies and germinating conidia produced both simple and forked germ tubes without appressorium and teleomorphic characters like cleistothecia with myceloid appendages, single ascus with eight ascospores the associated pathogen was identified as Sphaerotheca fuliginea (Schlecht.) Pollaci. Maximum conidial germination was observed at 25° temperature and 100% relative humidity. The development of powdery mildew disease was significantly favored at moderate temperature coupled with high relative humidity and cumulative rainfall.

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Section: Collection Of Samples and Identification Of Pathogensupporting

confidence: 93%

Morphological characterization and epidemiological studies of summer squash (Cucurbita pepo) powdery mildew

et al. 2021

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“…In the present study, the occurrence of powdery mildew in purple ipe plants may have been favored by in vitro culture conditions such as controlled temperature, light intensity, and the culture medium used. According to Rana et al (2018) and Gu et al (2020) these variables influence spore production. For biotrophic parasites like Oidium sp.…”

Section: Resultsmentioning

confidence: 99%

Seed pretreatment for control of powdery mildew infection on purple ipe micropropagation

et al. 2022

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Purple ipe (Handroanthus impetiginosus) is an important tree species in Cerrado biome conservation and very popular at the landscaping and urban afforestation. However, its micropropagation is affected by pathogens, such as Oidium sp. The aim this study was evaluate the efficiency of seed treatments in the control of powdery mildew of purple ipe obtained by micropropagation. The symptoms were observed during in vitro germination, a Koch’s postulates were performed for confirm the pathogenicity, colonization of the pathogen on the leaves was analyzed in optical and scanning microscopes and a scale to evaluate severity was proposed. Two experiments were realized to powdery mildew control using a completely randomized design, with 30 replicates. First experiment: Seeds were treated with ethanol (Et), chlorothalonil + thiophanate-methyl (C+TM), and sodium hypochlorite (NaOCl); second experiment: Seeds were treated with Et, NaOCl, C+TM, and neem oil. Disease severity and area under the disease progress curve (AUDPC) were assessed in both experiments. Disease symptoms and typical pathogen structures were observed, and the pathogenicity was confirmed. The disease severity was reduced by 30.78% in 1.5% neem oil for 10 min when compared with C+TM for 15 min. We conclude that neem oil can be a strategy sustainable for the control of powdery mildew in purple ipe in tissue culture.

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“…Os sintomas aparecem geralmente nas folhas, podendo também ocorrer na haste e nas vagens, e caracterizam-se por um crescimento branco-acinzentado, pulverulento, superficial, distribuído sobre os órgãos afetados (Figura 09). A severidade dos sintomas é maior se a infecção ocorrer antes do início da floração (RANA et al, 2018).…”

Section: Phoma (Phoma Sp)unclassified

Doenças Na Cultura Da Crotalária

Gabardo¹,

Silva²,

Clock³

2023

Gestão Ambiental E Biodiversidade: Tópicos Atuais Em Pesquisa

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A Crotalaria (Crotalaria sp. L.) é utilizada como estratégia de controle de nematoides além de trazer benefícios como a fixação de nitrogênio atmosférico, controle de plantas daninhas e melhoria dos atributos do solo. É uma leguminosa cultivada em sucessão das principais culturas de interesse comercial, o que pode aumentar a incidência e a severidade de algumas doenças. O objetivo deste capitulo é realizar a revisão de literatura sobre as doenças que podem ocorrer na cultura. O gênero Crotalaria é hospedeiro alternativo e fonte de inóculo de fungos fitopatogênicos, como a antracnose, certocistis, alternaria, fusarium, rhizoctonia, mofo branco, curvularia, phoma, oídio e septoriose, que podem causar danos a culturas de interesse econômico como a soja, o milho e o algodão. O seu amplo cultivo, a incidência de doenças e a possibilidade de transmissão de patógenos têm causado preocupações. Pouco se conhece a respeito de patógenos que podem estar associados às espécies de Crotalária, fazendo desta um potencial reservatório de inóculo das espécies patogênicas para grandes culturas. Assim, é importante que produtores, assistentes técnicos e pesquisadores estejam atentos a ocorrência de doenças para tomarem as decisões corretas, otimizando os pontos positivos de incluir esse adubo verde nos sistemas de produção.

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Studies on biology and environmental factors affecting the development of tomato powdery mildew under protected cultivation

Cited by 4 publications

References 18 publications

Morphological characterization and epidemiological studies of summer squash (Cucurbita pepo) powdery mildew

Morphological characterization and epidemiological studies of summer squash (Cucurbita pepo) powdery mildew

Seed pretreatment for control of powdery mildew infection on purple ipe micropropagation

Doenças Na Cultura Da Crotalária

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