12 resultados
In October 2010, containerized Acer palmatum Thunb. trees ('Red Select', 'Viridis', and 'Hubb's Red Willow') with crown cankers and root rot were observed at a central Virginia nursery. Sections of lower stem cankers and rootlets were sampled from 14 trees by surface-sterilizing tissue and plating
Between 2007 and 2011, Acer pseudoplatanus and Quercus robur trees declined in the North Park and the Boscoincittà Park in Milan, Italy (lat. 45° 27' 47″ N, long. 09° 11' 16″ E, elev. 121 m). Symptoms included extensive lengthwise bark cracks, with necrosis of the wood tissue underneath. Isolations
Plant small heat-stress proteins (sHSPs) have been shown to be expressed not only after exposure to elevated temperatures, but also at particular developmental stages such as embryogenesis, microsporogenesis, and fruit maturation. This paper presents new data on the occurrence of sHSPs in vegetative
A novel endophyte designated Collophora aceris, was obtained from stem tissues of Douglas Maple (Acer glabrum var. douglasii) in a Pacific Northwest temperate rainforest. Colonies were slow growing, white, creamy, moist, and translucent to opaque on potato dextrose agar and other media with few
A disease of shallot onions, Allium cepa var. ascalonicum, that caused yield losses of up to 20 to 30% in some fields was reported from Kalpitiya Peninsula in the North Western Province of Sri Lanka in the late 1980s. Disease symptoms consisting of chlorosis followed by curling and twisting of
In November 2001, during an examination of ornamental trees in Seville, Spain, several boxelders (Acer negundo L.) were observed with symptoms and signs of canker rot disease. Symptoms and signs occurred mainly 2 to 4 m above ground and included bulges of the stem and bark necrosis. Golden brown
Tree peony (Paeonia suffruticosa) is known as "the king of flowers" for its beautiful and showy flowers. It is regarded as the symbol flower of China and is cultivated throughout the country. During the summer of 2006, a leaf spot was observed on tree peony cultivated in the Zhengzhou area
The Parco Nord Milano, Italy is a 600-ha green area (45°53'71″N, 9°20'97″E). Since the spring of 2002, extensive and unknown decline was observed on 20-year-old sycamore (Acer pseudoplatanus), red oak (Quercus rubra), and English oak (Q. robur) plantations. The trees showed branch and twig dieback
Stem cankers and branches showing bark discoloration, fissuring, resin exudation leading to dieback, crown wilting, and tree mortality have been observed since late spring 2008 on 40-year-old Cupressus macrocarpa (Hartw.) trees planted in forests mixed with Juniperus oxycedrus L. and Acer
Soybean (Glycine max (L.) Merr.) is native to East Asia including Korea and is widely grown and consumed as an edible seed. In August 2011, following a prolonged period of cool and moist weather, zonate leaf spots were observed in local soybean (cultivar unknown) planted in a mountainous area of
Japanese hop (Humulus japonicus Siebold & Zucc. = H. scandens (Lour.) Merr.), native to East Asia, is an annual, climbing or trailing vine. The vines can spread to cover large areas of open ground or low vegetation, eventually blanketing the land and vegetation. Pollen of H. japonicus is
Phoenix canariensis Chabaud is a vital ornamental and widely planted in the urban landscape of China (Lan et al. 2019). In December 2019, six of seven P. canariensis plants exhibited typical symptoms of leaf spot in Chengdu campus of Sichuan Agricultural University in Sichuan, China,