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Evaluation of Systemic Fungicides for the Control of Pistachio Gummosis Disease | ||
| پژوهش های کاربردی در گیاهپزشکی | ||
| مقالات آماده انتشار، پذیرفته شده، انتشار آنلاین از تاریخ 05 اسفند 1403 | ||
| نوع مقاله: مقاله پژوهشی | ||
| شناسه دیجیتال (DOI): 10.22034/arpp.2025.19341 | ||
| نویسندگان | ||
| سید رضا فانی* 1؛ محمد مرادی2؛ رزا درگاهی2؛ عباس فرج پور اودرجی2؛ حمید علیپور2؛ حمیده سلمانی2 | ||
| 1بخش تحقیقات گیاهپزشکی، مرکز تحقیقات و آموزش کشاورزی و منابع طبیعی استان یزد، سازمان تحقیقات، آموزش و ترویج کشاورزی، یزد، ایران | ||
| 2پژوهشکده پسته، مؤسسه تحقیقات علوم باغبانی، سازمان تحقیقات، آموزش و ترویج کشاورزی، رفسنجان، ایران. | ||
| چکیده | ||
| Pistachio, which is of great economic importance in Iran, is highly susceptible to crown and root rot disease, also known as gummosis. To evaluate the effectiveness of systemic fungicides in controlling this destructive disease, different concentrations of fosetyl-Al (Elite®), potassium phosphonate, Metalaxyl (Ridomil® Gold), and phosphorous acid were tested against the major causal agents of gummosis, including Phytophthora citrophthora, P. dreschleri, P. pistaciae, and P. cryptogea. Both in vitro and in situ experiments were conducted. The findings revealed a significant increase in inhibition of mycelial growth in concomitant with an increase in concentration of fungicides compared with control. At concentrations of 1120, 320, 80, and 40 µg/ml, Elite, potassium phosphonate, phosphorous acid, and Ridomil, respectively, completely inhibited mycelial growth. All tested fungicides exhibited a reduction in colonization levels on branches, with potassium phosphonate at 320 µg/ml and Ridomil at 20 µg/ml concentrations showing 73% and 100% reduction, respectively. The effectiveness of fungicides in decreasing fungal colonization in the inoculation experiments on pistachio seedlings varied. Specifically, Elite, phosphoric acid, potassium phosphonate, and ridomil exhibited the highest levels of reduction, respectively. However, no significant differences were observed among the fungicide compounds with phosphite structure in inhibiting crown colonization in pistachio seedlings. These findings provide valuable insights for further investigation into the management of crown and root rot in pistachio trees. | ||
| کلیدواژه‌ها | ||
| Chemical control؛ Fosetyl-al؛ Metalaxyl؛ Phosphonic acid؛ Phytophthora | ||
| مراجع | ||
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