shot hole caused by wilsonomyces carpophilus is one of the main constraints to prune fruit production in iran particularly in khorasan razavi province. it causes foliage shot hole in spring and early summer; fruit-spotting and cankers on limbs and twigs during autumn rains. the fungus was isolated from the lesions of twigs and was purified on pda. the pathogenicity and virulence on detached twi...

Retain, a commercially available ethylene inhibitor developed by Valent BioSciences, has been widely tested on stone fruit for improving post harvest shelf life. This season, a simple test of its effect on Serr PFA was conducted in Kings County. A nine-year old block of Serr walnuts south of a Chandler orchard was selected. Ten fruiting shoots in each of twenty trees 120 to 150 feet south of th...

bacterial canker of stone fruit trees caused by pseudomonas syringae pv. syringae has become widespread throughout most fruit growing areas of iran (abbasi et al 2013). to evaluate the diversity of the strains and possible species inciting the disease in the central areas of the country, surveys were made in 2014 and 2015 in some central provinces including charmahal-and-bakhtiary, isfahan, qum...

identifying and selecting superior genotypes in native germplasm is one method for breeding fruit trees. five different ecotypes of jujube (ziziphus jujuba mill.) were collected from different regions of isfahan province, iran, for evaluation of their morphological and pomological traits during 2011-13. results showed that quantitative traits were more significant within ecotypes. ‘‘najafabad’ ...

A study was undertaken to analyses the heritability, correlation and path co-efficient for growth and fruit characters in twenty ber (Ziziphus mauritiana Lam) genotypes grown at Fruit Research Farm under Horticulture Research Centre, BARI during January to June 2006. The highest range of variation was recorded in fruit weight (6.63-44.72 g), followed by yield per plant (14.88 64.99 kg), stone w...

Whole fruit clusters of ‘Pawnee’ pecan [Carya illinoinensis (Wang.) C. Koch.] were collected from three shoot types: terminal and lateral shoots without a secondary growth fl ush and shoots that had an early-season secondary growth fl ush. Fruit per cluster were counted and nuts were individually harvested, weighed, shelled and graded. Bloom the following year was determined for the same shoots...

INTRODUCTION Prune dwarf ilarvirus (PDV) and its various strains cause many types of stone fruit diseases of considerable economic importance (Nemeth, 1986). The virus induces considerable damage in many hosts either by itself or in a mixed infection with other stone fruit viruses. PDV is transmitted naturally by infected pollen. PDV has worldwide distribution, especially where sweet and sour c...

A three-dimensional model of radiative transfer and leaf gas exchange was used to quantify daily carbon (C) assimilation of all fruit-bearing shoots (FBS) in an early maturing 6-year-old peach tree (Prunus persica L. Batsch) with a heavy crop load. For a sample of FBS (n=36), growth of fruit and leafy shoots was measured every 1-2 weeks from 24 days after bloom (DAB) until harvest, between 93-1...

an increasing world population and the competitive nature of the stone fruit market, particularly nectarines [(prunus persica var. nectarine)], demand the selection of fruit with high quality attributes, flavor, and a wide range of maturity. information on this subject is limited at the present time. in search of superior nectarines, a trial was conducted to study growing degree days (gdd), ful...

The propagation of light in stone fruit tissue was modeled using the Monte Carlo (MC) method. Peaches were used as the representative model of stone fruits. The effects of the fruit core and the skin on light transport features in the peaches were assessed. It is suggested that the skin, flesh and core should be separately considered with different parameters to accurately simulate light propag...