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Efficacy of the Commercial Product of Pythium oligandrum (Polyversum®) Against Cucumber Damping-off Disease, Caused by Pythium ultimum | ||
| آفت کش ها در علوم گیاه پزشکی | ||
| Volume 6, Issue 2 - Serial Number 11, August 2020, Pages 159-171 PDF (1004.09 K) | ||
| DOI: 10.22092/jppps.2019.123476 | ||
| Authors | ||
| Hossein Azimi* ; Shahram Naeimi | ||
| Abstract | ||
| Fungicides and biological symbionts are effective tools in integrated management of damping-off disease of cucumber, which is one of s the most important disease of this crop. In this study the efficacy of the commercial product of Pythium oligandrum (Polyversum®) to control cucumber damping-off disease caused by Pythium ultimum was studied. The experiment was carried out in a Completely Randomized Design with 10 treatments and 4 replications under greenhouse conditions in Tehran and Karaj. Treatments included 0.2, 0.25, 0.3, 0.35 and 0.4 gL-1 of Polyversum (WP 17.5%) as the target bio-fungicide, 40 g/1000 plants of commercial product of Trichoderma harzianum T-22 (Trianum-P®) as standard bio-fungicide, PrevicurEnergy 3 mlL-1 and Rosalaxil® 2 gL-1 as standard fungicides. Bio-fungicides were used immediately after planting in Karaj and 48 hours before planting in Tehran, and in both the regions treatments were repeated at two-leaf stage. Mean comparisons revealed that Polyversum® at the rate of 0.2, 0.25, 0.3, 0.35 and 0.4 gL-1 decreased the disease incidence by 25.5, 28.4, 30.6,42.9 and 45.8% in karaj and 49, 54.6, 62.5, 61.7 and 64.9% in Tehran s compared with the inoculated control respectively. In these trials TrianumP® decreased the disease incidence by 32 and 62.5% compared with the inoculated control in Karaj and Tehran respectively. PrevicurEnergy® and Rosalaxil® decreased the disease incidence by 90.2 and 96.8% in Karaj and 79.9 and 88.6% in Tehran trials respectively. This study revealed that the creation of an opportunity for the establishment of the biocontrol agents in the soil could increase their efficacy. | ||
| Keywords | ||
| Biocontrol; Fosetyl aluminum; Mancozeb; Metalaxil; Propamocarb hydrochloride; Trianum | ||
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