petiole and stem

Listing 1 - 10 from 139 for petiole and stem

Diseases of Ground Cover Plants, HYG-3064-96
... spot. This is especially visible when viewed from the leaf undersurface. Petiole and stem cankers may develop, causing leaf yellowing and shoot die-back. Wet weather or frequent overhead watering, particularly ... If excess fertilization causes dense growth, plants may need to be thinned. Remove dead leaves and other accumulated plant debris. Do this very early in the spring. Water to prevent weakened ...
ohioline.osu.edu

New Disease Reports - Eye-spot of Rudbeckia laciniata caused by Corynespora cassiicola in Brazil
... , leading to extensive leaf necrosis with occasional shot-holes (Figs 1-2). Petiole and stem lesions are brown, elongated and irregularly dispersed. Figure 1-2: Symptoms of Corynespora cassiicola on Rudbeckia ... Commonwealth Mycological Institute. Farr DF, Bills GF, Chamuris GP, Rossman AY, 1989. Fungi on Plants and Plant Products in the United States. St. Paul, USA: APS Press. Lorenzi HL, Souza HM, ...
www.bspp.org.uk

New Disease Reports - First report of the natural occurrence of Tobacco streak virus on blackgram (Vigna mungo)
... brown necrotic lesions on the young leaves; middle, brown streaks on the petiole and stem; right, petiole and stem necrosis of TSV infected plants. Infected leaf samples of blackgram tested positive ... 296. Bhat AI, Jain RK, Ramiah M, 2002. Detection of Tobacco streak virus from sunflower and other crops by reverse transcription polymerase chain reaction. Indian Phytopathology 55, 216-218. Prasada Rao ...
www.bspp.org.uk More from this site

VDIN-011 - Anthracnose of Cucurbits
... may cause entire leaves to blight. Leaf petiole and stem lesions are shallow, elongate and tan. Lesions on fruit are roughly circular, sunken and contain pinkish spore masses in moist weather. ... State University at Raleigh, North Carolina A&T State University, U.S. Department of Agriculture, and local governments cooperating. Last update to information: July 1991 Web page reformatted Dec. 2000 by ...
www.ces.ncsu.edu

Questions On Jade Plants
... The white one is probably Crassula aroborescens arborescens, also known as the silver dollar jade. They are rare and generally need more light than the more common C. argentia. Such anomalies are often the result of ... your problem. If you see small white cotton looking pieces at the juncture of the leaf petiole and stem, then it is an invasion of cottony cushion scale. If it is the spider mite that ...
www.ext.nodak.edu

ivy leaf spot
... as well as bacteria. Fungus Leaf Spot can be caused by Colletotrichum trichellum, Amerosporium, Glomerella, Phyllosticta, and Ramularia. They appear as irregular tan to brown spots or may cause marginal browning of the ... brown to black. There may also be a yellow to red halo around the spot. Petiole and stem cankers can also develop. This all sounds terrible, but fortunately if caught early both of ...
www.ivy.org

Rhubarb, Commercial Vegetable Production Guides, North Willamette Research and Extension Center
... vigorous and more intense in color, typically with a darker pink speckling on a green stem. Green types: Riverside Giant, a cold-hardy, vigorous producer with large diameter, long, green stalks. For more information on ... no leaf tissue remains. For fresh market a small amount (1/4 inch) of leaf tissue is usually left attached to the petiole and the basal end is not trimmed. Splitting of the petiole ...
oregonstate.edu

Fusarium and Verticillium Wilts of Tomato, Potato, Pepper, and Eggplant, HYG-3122-96
... 2). This discoloration often extends upward for some distance and is especially evident at the point where the petiole joins the stem. Potato tubers may show browning of the vascular ring ... Keep rotational crops weed-free (there are many weeds hosts of Verticillium). Whenever practical, remove and destroy infested plant material after harvest. Maintain a high level of plant vigor with appropriate ...
ohioline.osu.edu

Plant Propagation by Leaf, Cane, and Root Cuttings: Instructions for the Home Gardener
... treated as a cutting. This type of cutting consists of a leaf blade, petiole, and a short piece of stem with an attached axillary bud. Place cuttings in the medium with the bud ... include clematis, rhododendron, camellia, jade plant, rubber plant, devils ivy, grape ivy, dracaena, blackberry, mahonia, and heart-leaf philodendron. Figure 4. Cane Cuttings Cane cuttings provide an easy way to propagate ...
www.ces.ncsu.edu

Search for Stem - Plants For A Future database search
... Organics Perennial Plants Conservation Habitat Links New Links Old Links Page Plant Suppliers Databases News Groups and mailing lists UK Orginizations About Us The Book Membership Cornwall Site Devon Site Other Leaflets ... 2 0 Beta vulgaris cicla Spinach Beet Stem 4 2 Beta vulgaris flavescens Swiss Chard Stem 4 2 Brassica juncea strumata Large Petiole Mustard Stem 4 2 Brassica juncea tumida Swollen- ...
www.pfaf.org