Pear is one of the most important fruit species grown in temperate zones globe. Besides production, pear are highly valued forestry and agroforestry systems; landscaping, as ornamental features; fruits ecological value, other areas. The Pyrus species, obtained from a gene bank, were evaluated for different morphological traits trees, leaves, flowers, fruits, well their responses to attacks prin...

The topography and morpho-anatomical characteristics of floral nectaries the chemical analysis nectar have been studied in seven pear cultivars with different susceptibility to Erwinia amylovora. susceptible cultivar Williams, moderately resistant Bella di guigno, Poire de Cure low Alexander Lucas originated from Pyrus communis, while highly Chojuro Nijisseiki P. pyraster Kieffer as interspecie...

Prunus and Pyrus species affected with phytoplasma diseases, as well as leafhopper species collected from Prunus and Pyrus fields in Ontario, Canada were tested for presence of phytoplasmas. Preliminary results showed that Graminella nigrifrons is a potential vector for phytoplasma groups 16SrI-W (‘Candidatus Phytoplasma asteris’), and 16SrVII-A (‘Candidatus Phytoplasma fraxini’) to a variety o...

to determine the specificity and host range of wilsonomyces carpophilus isolates, some stone fruit seedlings (prunus armeniaca, prunus dulcis, prunus reuteri, p. vulgaris, p. domestica, p. persica, p. avium and p. cerasus), pome fruits (malus communis, pyrus communis, crataegus azarollus and crataegus monogyna) as well as ornamental plants (rosa persica, rosa sp. and r. damascena) were selected...

A field experiment was conducted in the Agricultural Research Station, at El-Ghoraieb, Assiut to study dry seed yield performance of two locally adapted cultivars (‘Azmerly’ and ‘Cream 7’) and two line introductions (IT81D-1032 and IT82D-812) of common cowpea (Vigna unguiculata (L.) Walp) grown at three different within-row spaces (20, 30 and 40 cm) and two planting dates in the summer (April 1...

Background and Aims: In spite of a long tradition of fruit-tree growing in all provinces of Iran, information on pear (Pyrus communis) tree viruses is scant. In order to identify of the nature of the virus like symptoms and decline in pear trees, we carried out a survey for the occurrence of four important viruses. Materials and Methods: Leaf samples of pear showing virus like symptoms wer...

Over the last decades, fruit trees in Europe have tended to flower earlier due warmer winters. The impact of destructive spring frosts remains considerable as exemplified by damage during pome flowering Belgium between 2017 and 2021. While several regional studies on evolution this phenomenon exist, pear (Pyrus communis) has received little attention. We focused commercially important cultivar ...