Table 1.
Field survey locations and environmental conditions for watermelon disease assessment in Bangladesh, 2024.
Fig 1.
Watermelon disease symptoms were observed in different infected plant parts during the field study.
Table 2.
Symptoms of watermelon diseases were observed under field conditions in the Sylhet and Natore districts of Bangladesh.
Fig 2.
PCR amplified products of fungus and water mold obtained from (1) Colletrotrichum orbiculare isolate NatBD-6, (2) Cercospora citrullina isolate NatBD-7, (3) Fusarium oxysporum isolate NatBD-8, (4) Stagonosporopsis cucurbitacearum isolate SylBD-1, (5) Pseudoperonospora cubensis isolate SylBD-2, and (6) Phytophthora capsici isolate SylBD-3. M: denotes 1kb DNA ladder (Marker).
Fig 3.
PCR amplified products of bacteria obtained from (1) Acidovorax citrulli isolate SylBD-4, (2) Pseudomonas syringae isolate SylBD-5, and (3) Serratia marcescens isolate NatBD-9. M: denotes 1kb DNA ladder (Marker).
Table 3.
Results of gene identification with the BLAST program.
Fig 4.
Phylogenetic tree for fungal and water mold pathogens of watermelon plants collected from Natore and Sylhet regions in Bangladesh.
This analysis involved 18 nucleotide sequences where the clusters fall into 6 distinct clades of fungal and water mold strains. * Denotes the isolates obtained from the watermelon samples.
Fig 5.
Phylogenetic tree for bacterial pathogens of watermelon plants collected from Natore and Sylhet regions in Bangladesh.
This analysis involved 9 nucleotide sequences where the clusters fall into 3 distinct clades of bacterial strains. * Denotes the isolates obtained from the watermelon samples.
Table 4.
Prevalence of the identified watermelon diseases in Sylhet and Natore regions.