Vol. 8, Issue 5 (2020)
Efficacy of Pydiflumetofen 7.5% + Difenoconazole 12.5% w/v (200 SC) in combating apple disease complex in Uttarakhand
Author(s): Laxmi Rawat, TS Bisht and Akshit Kukreti
Abstract: The present investigation was carried out to evaluate the bio-efficacy of Pydiflumetofen 7.5% + Difenoconazole 12.5% w/v (200 SC) at different doses along with standard checks viz., Pydiflumetofen 20% SC, Difenoconazole 25% EC, Metiram 55% + Pyraclostrobin 5% WG, Mencozeb 75% WP at recommended doses and untreated check (Control) against apple scab, premature leaf fall and powdery mildew diseases of apple at Harsil and Jhala fruit belt (District- Uttarkashi) locations over two consecutive growing seasons. The field experiment was arranged in randomized complete block design with three replications and nine treatments. Data on different apple diseases for two crop seasons (2017 and 2018) revealed that all the fungicides tested were found effective for the management of scab, premature leaf fall and powdery mildew diseases of apple as compared to untreated check (Control). However, the treatment T4 [Pydiflumetofen 7.5% + Difenoconazole 12.5% w/v (200 SC) @ 600 ml/ha] was found most effective followed by T3 [Pydiflumetofen 7.5% + Difenoconazole 12.5% w/v (200 SC) @ 500ml/ha] for all the diseases studied under Harshil and Jhala locations during both the studied years under present materials and conditions. However, the highest disease intensity for all the studied diseases was recorded in untreated control. The data of two consecutive crop seasons indicated maximum yield (96.07 q/ha & 93.69 q/ha in 2017 and 2018, respectively from Harshil location and 100.37 q/ha & 98.13 q/ha in 2017 and 2018, respectively from Jhala location) when the crop was sprayed with Pydiflumetofen 7.5% + Difenoconazole 12.5% w/v (200 SC) @ 600 ml/ha followed by when sprayed with the same treatment @ 500 ml/ha (92.25 q/ha in 2017 and 89.82 q/ha in 2018 from Harshil location and 97.64 q/ha in 2017 and 95.41 q/ha in 2018 from Jhala location). Whereas, minimum yield (66.70 q/ha in 2017 and 56.17 q/ha in 2018 from Harshil location and 74.25 q/ha in 2017 and 63.01 q/ha in 2018 from Jhala location) was recorded when tress were left unsprayed (Control) from both the locations during both the studied years.
DOI: 10.22271/chemi.2020.v8.i5s.10489
Pages: 1350-1356 | 967 Views 242 Downloads
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How to cite this article:
Laxmi Rawat, TS Bisht, Akshit Kukreti. Efficacy of Pydiflumetofen 7.5% + Difenoconazole 12.5% w/v (200 SC) in combating apple disease complex in Uttarakhand. Int J Chem Stud 2020;8(5):1350-1356. DOI: 10.22271/chemi.2020.v8.i5s.10489
