Two diseases have been observed in North Florida watermelon. Bob Hochmuth, University of Florida Institute of Food and Agricultural Sciences (UF/IFAS) Regional Specialized Extension agent in Live Oak, Florida, reported in his weekly email that Psudomonas (angular leaf spot) and gummy stem blight have been reported, though in isolated fields. “If bacterial diseases are not a concern in your fields, …
Bacterial Spot: Active but Declining in South Florida
Bacterial spot disease continues to be active on tomato and susceptible pepper varieties across Southwest Florida, according to the South Florida Pest and Disease Hotline. However, overall disease pressure has declined with the recent dry weather in the southern part of the state. The disease continues to be widespread in fields in Homestead, Florida and is starting to become prevalent …
Gummy Stem Blight Disease: Be Proactive, Not Reactive
By Clint Thompson The best defense against gummy stem blight disease is a good offense. Protectant fungicides are available for Alabama’s watermelon producers to guard against it, but growers need to be proactive in applying the fungicides and not be reactive, says Ed Sikora, professor and Extension plant pathologist in the Department of Entomology and Plant Pathology at Auburn University. …
Disease Management Vital for Blueberry Producers Following Freeze
By Clint Thompson A dire situation could get worse for blueberry growers impacted by the freeze event during the weekend of March 12. The crop is susceptible to potential disease pathogens that require immediate action, says Jonathan Oliver, University of Georgia (UGA) assistant professor and small fruits pathologist. “The blueberries were at green fruit stage for the highbush. If they …
Management Strategies for Cucurbit Farmers Against Anthracnose
By Clint Thompson The best management strategies for cucurbit farmers in combating anthracnose disease occurs before the crop will be planted this season. Ed Sikora, professor and Extension plant pathologist in the Department of Entomology and Plant Pathology at Auburn University, discusses the importance of using varieties that are resistant to the pathogen. “Fortunately, we do have resistant varieties to …
Little Impact from Neopestalotiopsis Fruit Rot This Season for Florida Strawberry Growers
By Clint Thompson A calm disease year for Florida’s strawberry growers meant fewer instances of Neopestalotiopsis Fruit Rot disease. After the previous couple of seasons, producers welcomed the break, says Natalia Peres, professor of Plant Pathology at the University of Florida/IFAS Gulf Coast Research and Education Center. “It’s been pretty quiet with few exceptions from growers that got plants that …
Thermotherapy for Production of Nematode-Free Plant Material
By Johan Desaeger Producing nematode-free plant material is one of the most important steps in nematode management. Many nematodes can hide in plant material such as tubers, bulbs, roots, cuttings and seed. The seed gall nematode (Anguina tritici), a seedborne pest infecting seed heads in wheat and rye, was the first plant-parasitic nematode ever to be described (by Needham in …
Integrated Pest Management of Chilli Thrips in Strawberries
By Sriyanka Lahiri Currently, strawberry production in Florida is particularly susceptible to infestation by chilli thrips (Scirtothrips dorsalis). Although chilli thrips had been reported as a pest of ornamentals in Florida before, it wasn’t until 2015 when strawberry fields started to be severely impacted by this invasive pest. CHEMICAL CONTROLSChemical control is the predominant tool to manage chilli thrips. However, …
Grafting in Tomato: A Practical Tool for Root-Knot Nematode Control
By Abolfazl Hajihassani Control of root-knot nematodes (Meloidogyne spp.) is a severe challenge for growers because the pests have abroad host range and can survive in the soil for several years. This makes crop rotation impractical and inefficient for nematode management. Other major management options for root-knot nematodes in tomato include chemical controls using fumigant and non-fumigant nematicides and resistant varieties/rootstocks. …
Downy Mildew Disease: Fungicide Resistance a Concern for Grape Producers
By Clint Thompson Downy mildew disease in Southeast grape production is bad enough. The problem is exacerbated as disease resistance continues to worsen. Phil Brannen, University of Georgia Cooperative Extension Fruit Disease Specialist, explains the concerns that producers in Georgia and Alabama should have about the potential for further resistance developing. “There’s already been resistance to the strobilurin (quinone outside …