Pathogen and symptoms Wirestem is a disease of cole crops (e.g., broccoli, cauliflower, and cabbage) caused by the soilborne fungus Rhizoctonia solani. This summer, cole growers from the state’s northern region reported that their crops were affected by poorly developed root systems. Upon examination, the plants showed brown stems (figure 1) and narrow roots with[Read More…]
Cesar Escalante
Root-knot nematode (RKN, Meloidogyne spp.) is a major problem in cucurbits such as watermelon, cantaloupe, cucumber, pumpkin, and squash. The reason RKN is problematic lies in their ability to persist for long periods in the soil and their wide host range, which includes more than 2,000 plant species, including crops and weeds. RKN infestations are[Read More…]
Bacterial fruit blotch (BFB) is a disease caused by the pathogen Acidovorax avenae subsp. citrulli. Most cucurbit crops are affected by this disease, although watermelon cultivars are commonly more susceptible. However, this summer, I received cantaloupe samples (Figures 1 and 2) that tested positive for BFB using serological tests. When environmental conditions are conducive,[Read More…]