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Kumari, Neelam
- Biological Control of Rose Powdery Mildew (Podosphaera pannosa (Wallr.: Fr.) De Bary
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Authors
Affiliations
1 Department of Plant Pathology, Dr. Y.S. Parmar University of Horticulture and Forestry, Nauni, Solan (H.P.), IN
1 Department of Plant Pathology, Dr. Y.S. Parmar University of Horticulture and Forestry, Nauni, Solan (H.P.), IN
Source
International Journal of Plant Protection, Vol 9, No 2 (2016), Pagination: 639-643Abstract
Powdery mildew, caused by Podosphaera pannosa (Wallr.: Fr.) de Bary (Syn. Sphaerotheca pannosa var rosae (Wallr.: Ex Fr.) Lev.), is one of the most important fungal diseases in roses. These are obligate parasites and considered as one of the most distributed and destructive groups of plant pathogens. The symptoms appear on leaves, shoots, buds, thorns, peduncles and flowers as powdery, whitish growth (mycelium, conidiophores and spores) of the mildew fungus. Plants can be severely stunted if they are heavily infected early in the growing season. The disease has been managed mainly by chemical fungicides but increasing public concern over the use of fungicides has made the development of biological control for powdery mildew highly desirable. Recent reports have highlighted the potential of biological control as an alternative strategy for disease management. Several biological control methods such as use of microbial antagonists (fungi, bacterial, yeast and yeast like organisms), botanicals and bioproducts have been found effective against rose powdery mildew fungi. The main objective of this review paper is to summarize the data on the microbial antagonists, bioproducts (anhydrous milk products, oils and compost extracts) and botanicals which have been reported effective for the better management of this plant pathogen.Keywords
Antagonists, Biological Control, Bioproducts, Botanicals, Podosphaera pannosa, Rose.
References
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- Bio-Efficacy of Novel Insecticides and Pymetrozine 50% WG against Insect Pests of Paddy
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Authors
Affiliations
1 Department of Entomology, College of Agriculture, Sardar Vallabhbhai Patel University of Agriculture and Technology, Meerut (U.P.), IN
2 Department of Zoology, School of Entomology, St. John’s College, Agra (U.P.), IN
1 Department of Entomology, College of Agriculture, Sardar Vallabhbhai Patel University of Agriculture and Technology, Meerut (U.P.), IN
2 Department of Zoology, School of Entomology, St. John’s College, Agra (U.P.), IN
Source
International Journal of Plant Protection, Vol 11, No 1 (2018), Pagination: 23-29Abstract
A field experiment was conducted in Randomized Block Design with three replications of eight treatments during Kharif season 2014 at Chirori university research centre, SardarVallabhbhai Patel University of Agriculture and Technology, Meerut (U.P.) to evaluate the effect of some novel insecticides against insect pests of paddy. Efficacy of seven insecticides viz.,Pymetrozine 50% WG (GSP sample) @ 250, 300 and 400 g/ha, Pymetrozine 50% WG (market sample) @ 300 g/ha, Imidacloprid 17.8% SL @ 125 ml/ha and Fipronil 5% SC@ 1500 ml/hatasted against green leaf hopper (Nephotettixvirescens), Brown plant hopper (Nilaparvatalugens) and White backed plant hopper (Sogatellafurcifera). The results of the experiment showed that Pymetrozine 50% WG (GSP sample) @ 300 and 400 g/ha and Pymetrozine 50% WG (Market sample) @ 300 g/ha effectively controlled BPH, GLH and WBPH pests followed by Imidacloprid 17.8% SL @ 125 ml/ha and Fipronil 5% SC @ 1500 ml/ha. No phytotoxicity symptoms on paddy crop and no adverse effect on natural enemies were recorded due to application of treatments. Since Pymetrozine 50% WG @ 300 g/ha was equally effective to 400 g/ha dose.Keywords
Novel Insecticides, Pymetrozine 50% WG, Insect Pests, Paddy.References
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