Early blight, caused by Alternaria solani is one of the destructive diseases potato. An in vitro experiment was conducted using poisoned food technique to evaluate efficacy acetone extracts six plant species on mycelial growth A. solani. Plant Artemisia vulgaris, Melia azedarach, Parthenium hysterophorus, Datura stramonium, and Justicia adhatoda at concentrations 0.1%, 0.5% 5% prepared from Sox...

UV-B radiation and EOD light (EOD) quality has both signaling and damaging effects based on the dosage and time of exposure. At highland areas UV-B decreases crop productivity and also light quality increase at high elevation area but EOD light quality effect was not researched based on altitude. Therefore, in the present study a field experiment was conducted to investigate the effects of UV-B...

Crown rot is one of the main important fungal diseases affecting wheat in many areas of the world, including Australia, USA, and Iran. Until now, there had been no report of this pathogen in Iraq. Plants displaying crown rot symptoms were observed in Shaat Alarab (Basra, Iraq); we investigated the causal agent of the disease. Samples were surface-sterilized in bleach (1% available chlorine...

Potato brown spot caused by Alternaria alternata (Fr.) Keissler is one of the most destructive diseases potato worldwide. The present study was conducted to identify causal agent, and test efficacy several fungicides with different modes actions against A. alternata. Five chemical including; Copper oxychloride (Sufer Oxychloride® 50% WP), Carbendazim (Carbendazim Aria® 60% Penconazole (Penconaz...

Seed coating is a method of encasing seeds in adhesive materials to improve germination and performance while lowering cost. has been widely used agriculture as an efficient way reduce biotic abiotic stressors, hence boosting crop growth, productivity, health, order satisfy the demands development precision agriculture. Plant-beneficial microorganisms include Trichoderma, rhizobium, arbuscular ...

Development of protection tools targeting Dickeya species is an important issue in the potato production. Here, we present the identification and the characterization of novel biocontrol agents. Successive screenings of 10,000 bacterial isolates led us to retain 58 strains that exhibited growth inhibition properties against several Dickeya sp. and/or Pectobacterium sp. pathogens. Most of them b...

In April 2002 and 2003, soft rot on fruit of eggplant (Solanum melongena) caused by Choanephora cucurbitarum was observed in the experimental fields at Gyeongnam Agricultural Research and Extension Services in Korea. The disease began with water-soaking and dark-green lesions, and then the infected tissues were rapidly rotten. Sporangium was subglobose in shape and sized 40~130 µm. Monosporous ...

Brown rot, also known as bacterial wilt, is one of the most destructive diseases of potato. The disease has been estimated to affect about 3.75 million acres in approximately 80 countries throughout the world with global damage estimates currently over $950 million per year. The disease is known to occur in the wet tropics, sub-tropics and some temperate regions of the world. In the United Stat...

during 2001-2005, 79 isolates of rhizoctonia from seed rot, seedling damping –off, root rot and dry rot canker of sugar beet were collected. based on morphological characteristics, number of nuclei per cell and hyphal diameter, isolates were classified in two groups, binucleate (4 isolates) and multinucleate (75 isolates). among 75 multinucleate isolates ,27 isolates were identified as  ag4, 28...

in this study, biocontrol effect of some strains pseudomonas fluorescent surveyagainst pythium aphanidermatum the causal agent of cucumber root rot disease. first biocontrol ability of bacteria against the fungal pathogen evaluated by cross-culture method. results showed that inhibition zone of strain t17-4 (7.5 mm) was more than others. seven strains including t17-4, cha0, cha89, vupf52, vupf5...