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Journal of Biological Sciences
  Year: 2019 | Volume: 19 | Issue: 2 | Page No.: 122-130
DOI: 10.3923/jbs.2019.122.130
 
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Comparative Response of Cantaloupe Features to Amino Acids, Humic Acid and Plant Oils Towards Downy Mildew Disease

Kamar Mohamed Abd El-Hai , Ayman Yahya El-Khateeb , Abeer Abdulkhalek Ghoniem and WesamEldin Ismail Ali Saber

Abstract:
Background and Objective: Pseudoperonospora cubensis, is the causal pathogen of cucurbit downy mildew, with behavior as an obligate parasite to crops within Cucurbitaceae family. Control of this pathogen commonly used costly fungicide programs, which a current application developed resistant fungi. The aim of the study was to investigate the vegetative features, biochemical parameters and fruity yield of cantaloupe as a response to amino acids, humic acid and essential oils (anise and thyme) towards downy mildew disease. Materials and Methods: The investigation trial was conducted under natural infection with P. cubensis, whereas the mixture of amino acids, humic acid (1000 and 2000 ppm), essential oils of thyme and anise (2 and 4 mL L1) were treated as a foliar spray for plants and compared with fungicide. Results: Amino acids and humic acid showed a highly significant decrease in the percentage of disease incidence and severity. As well as, significant response of plant heights, branches number, shoot dry weights and leaves area to amino acids and humic acids has been obtained. Interestingly, the low dose of humic acid (1000 ppm) was more effective compared to a high dose (2000 ppm) in the induction of the afore-mentioned parameters. However, both thyme and anise showed moderate significance at a certain concentration and season. The superiority of amino acids in productivity of yield. Conclusion: Amino acids and humic acid were effectively decrease the disease incidence and severity (%) of cantaloupe and improved the vegetation characters, biochemical and fruity yield.
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How to cite this article:

Kamar Mohamed Abd El-Hai, Ayman Yahya El-Khateeb, Abeer Abdulkhalek Ghoniem and WesamEldin Ismail Ali Saber, 2019. Comparative Response of Cantaloupe Features to Amino Acids, Humic Acid and Plant Oils Towards Downy Mildew Disease. Journal of Biological Sciences, 19: 122-130.

DOI: 10.3923/jbs.2019.122.130

URL: https://scialert.net/abstract/?doi=jbs.2019.122.130

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