Investigation of the Fusarium oxysporum-caused watermelon wilt infection and testing of some hybrids' susceptibility to infection

Abstract

This study was conducted in the College of Agriculture, the University of Anbar, which aimed to diagnose the Fusarium oxysporium. The field survey results showed the spread of the disease in all areas for the seasons 2020-2021 and 2021-2022 in the governorates of Anbar, Baghdad, Salah al-Din, and Babylon. The infection rate ranged from 20-66%. The infection rate ranged from 20-66%, and the results of the phenotypic and molecular diagnosis showed the presence of the Fusarium oxysporium in the isolated samples. The results of the hybrid sensitivity test ( Jocker, Natasha, Pasha) for the three most pathogenic isolates, as all the hybrids were sensitive to highly pathogenic fungi, and the isolates were All of them are highly pathogenic. Keywords: Fusarium wilt, watermelon, hybrids, sensitivity

Detection of Pathogenic Fungi Causing Root and Crown Rot Diseases in Strawberry Fragaria ananassa Duch

“…The DNA extraction results for eleven isolated fungi from the roots and crowns of strawberry plants in different isolation areas revealed varying quantities of nucleic acid, ranging from 100 to 1500 base pairs (bp), as shown in Table 3. The partial diagnosis results using the PCR technique, based on the intergenic spacer region using primers (ITS1-ITS4), showed amplicons of (650) base pairs (bp) [13]. After migration on 2% agarose gel.…”

“…symptoms include wilting, yellowing, and stunting of the aboveground parts. these pathogens destroy the root system, negatively impacting the aboveground growth [3]. scientific research has indicated that plant decline and mortality pose a significant challenge to strawberry production, despite the fact that crown and root diseases are among the key factors that determine production, particularly during the growing season.…”