petiole and stem

Listing 1 - 10 from 140 for petiole and stem

Diseases of Ground Cover Plants, HYG-3064-96
... and become dark brown or black. The watersoaking will still be evident on the edge of the 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 in ...
ohioline.osu.edu

New Disease Reports - Eye-spot of Rudbeckia laciniata caused by Corynespora cassiicola in Brazil
... a medicine, as well as being grown widely as an ornamental in the USA and abroad. During 2004 and 2005, R. laciniata plants cultivated at the Campus of the Universidade Federal de ... 0 mm diameter and surrounded by a yellow halo. The spots coalesced, leading to extensive leaf necrosis with occasional shot-holes (Figs 1-2). Petiole and stem lesions are brown, elongated and irregularly dispersed. Figure ...
www.bspp.org.uk

New Disease Reports - First report of the natural occurrence of Tobacco streak virus on blackgram (Vigna mungo)
... Ladhalakshmi1*, M. Ramiah1, T. Ganapathy1, M. Krishna Reddy3, Salah Eddin Khabbaz1, Merin Babu1 and A. Kamalakannan2 1 Department of Plant Pathology, Tamil Nadu Agricultural University, Coimbatore, ... , 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 ...
www.bspp.org.uk More from this site

VDIN-011 - Anthracnose of Cucurbits
... be distorted and severe spotting 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. Spots on watermelon foliage are black, and a ...
www.ces.ncsu.edu

Questions On Jade Plants
... veins or at the juncture of the leaf petiole attachment to the stem, then it is one of the insect ... and would be the cause 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 is causing the problem, move the plant to your bathtub and spray the top and ...
www.ext.nodak.edu

ivy leaf spot
... 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 disease progresses the spots will enlarge and turn dark brown to black. There may also be a yellow to red halo around the spot. Petiole and stem cankers can also develop. This all ...
www.ivy.org

Rhubarb, Commercial Vegetable Production Guides, North Willamette Research and Extension Center
... and more intense in color, typically with a darker pink speckling on a green stem ... petiole and the basal end is not trimmed. Splitting of the petiole will be more serious if the entire leaf is removed. A machine has been developed by USDA Agricultural Engineers and ...
oregonstate.edu

Fusarium and Verticillium Wilts of Tomato, Potato, Pepper, and Eggplant, HYG-3122-96
... wilt and Verticillium wilt. The wilt organisms usually enter the plant through young roots and then grow into and up the water conducting vessels of the roots and stem. As the vessels are plugged and collapse ... distance and is especially evident at the point where the petiole joins the stem. Potato tubers may show browning of the vascular ring (Figure 3) as well as browning at the stem end and decay ...
ohioline.osu.edu

Plant Propagation by Leaf, Cane, and Root Cuttings: Instructions for the Home Gardener
... and when space or cutting material is limited. Each node on a stem can be 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 covered (1/2 to 1 inch) and ...
www.ces.ncsu.edu

Search for Stem - Plants For A Future database search
... 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 ... flavescens Swiss Chard Stem 4 2 Brassica juncea strumata Large Petiole Mustard Stem 4 2 Brassica juncea tumida Swollen-Stem Mustard Stem 4 2 Brassica napus Colza Stem 3 2 Brassica nigra Black Mustard Stem 3 ...
www.pfaf.org

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