Abootorabi E. 2017. Four marigold species as control agents of root knot nematodes. Plant Pathology Science 6(1):68-79.
The Root knot nematodes (Meloidogyne spp.) are major limiting factors in growing many agricultural crops. With the aim of producing a healthy crop, cultivation of some plants with allelopathic effects on nematodes is one of the most effective control measure against root knot nematodes. This method can be used as an excellent substitute of chemical treatment. Marigolds (Tagetes spp.) are herbaceous plants of family Astraceae with more than 50 species, can be used as ornamental cover crops. Nematicidal effects of marigolds on several nematodes had been proved. Marigolds produce alpha-terthienyl enzyme, which can control root-knot nematodes and other pests and pathogens such as fungi, bacteria and insects. It also has positive role in promoting growth of bedding plants. In this article, important marigold species including Tagetes tenuiifolia Cav., T. minuta L., T. patula L. and T. erecta L., have been introduced.
Dr. Nazanin Sadat Ebadi, Dr. Mohammad Mehdi Faghihi, Volume 14, Issue 2 (4-2025)
Abstract
Leaf gall and fasciation disease of ornamental flowers and some crops and vegetables, is caused by the gram-positive bacterium Rhodococcus fascians. The symptoms of the disease are leaf gall, fasciation, and witches’-broom of the branches. The disease has been reported sporadically from most of the floricultural areas of the world and is especially important in the cut flower industry. The disease was first reported in 1976 on the petunia from Iran. R. fascians has a wide host range and causes severe symptoms in some susceptible hosts. The pathogen is often spread with rain, irrigation water and during flower harvesting and is also seed-borne in some hosts. Prevention and adherence to cultural hygiene are the most important strategies for disease management. Various aspects of the disease including history, disease symptoms, pathogen characteristics, host range, disease cycle, pathogenesis mechanism, and its management are described in this article
