Additional Index Words. Cucumis sativus L., greenhouse, protected culture, beit alpha cucumber Abstract. The Beit Alpha (BA) cucumber is a new commodity for the Florida greenhouse industry. In past trials, BA cultivar production and quality were compared to traditional ‘Dutch’ or European cucumber cultivars. The cv. Sarig, a BA-type, produced three times more yield than the Dutch-type cv. Kalun...

Pathogenesis-related proteins (PRs) can lead to increased resistance of the whole plant to pathogen attack. Here, we isolate and characterize a PR-4 protein (VpPR4-1) from a wild Chinese grape Vitis pseudoreticulata which shows greatly elevated transcription following powdery mildew infection. Its expression profiles under a number of abiotic stresses were also investigated. Powdery mildew, sal...

Powdery mildew of sugar beet, a disease of major economic significance, was first described at the beginning of the 20th century, and since then there has been some confusion over the correct taxonomic identity of the causal agent. In Europe, the fungus was initially classified as the novel species Microsphaera betae, later re-named Erysiphe betae, whilst in America it was identified as E. poly...

Objectives: 1. Develop a weather-based model for scheduling fungicide applications to improve disease control and reduce fungicide usage. 2. Evaluate efficacy of various products for control of apple powdery mildew. 3. Evaluate reduced DMI and strobilurin fungicide programs, in combination with inorganic salts, for control of powdery mildew. 4. Evaluate various reduced fungicide programs, alone...

The barley leaf rust fungus forms appressoria over host leaf stomata and penetrates via the stomatal pore. High levels of avoidance to leaf rust fungi have been described in some wild accessions of Hordeum species where a prominent wax layer on the stomata inhibits triggering of fungal appressorium differentiation. Leaf rust avoidance has not yet been found in H. vulgare. Since cuticular leaf w...

A powdery mildew fungus Leveillula taurica (Erysiphales) is reported for the first time on fig tree (Ficus carica) (Moraceae) in Sistan region, Iran. One hundred fungal organs including clistothecia, asci, ascospores and conidia, were micrometried by the calibrated Olympus BH2 microscope. All characters of the organs were recorded and drawn using a drawing tube. Conidiophores were with cylindri...