Phomopsis Shoot Blight of Colorado Blue Spruce

Novel species of Botryosphaeriaceae associated with shoot blight of pistachio.

Various species of phytopathogenic Botryosphaeriaceae were identified previously from pistachio trees worldwide. Disease symptoms caused by pathogens in Botryosphaeriaceae on pistachio include panicle and shoot blight, leaf defoliation, fruit discoloration and decay. In this study species of Botryosphaeriaceae were collected from blighted pistachio shoots in Arizona, USA, and Greece. The aims o...

Effect of certain fungicides in controlling damping-off in seedlings of ponderosa pine, Douglas-fir, and Colorado blue spruce

Analysis of Fire Blight Shoot Infection Epidemics on Apple

Fire blight of apple (Malus × domestica Borkh.) can be found throughout the United States and many other countries and is a serious problem on trees of susceptible apple cultivars (9). Fire blight is caused by the bacterium Erwinia amylovora and occurs also on pear, quince, Rubus spp., and several other rosaceous hosts. The initial inoculum in an established orchard comes from overwintering can...

Shoot-Forming Cultures of White Spruce (Picea glauca) Buds1

Nitrogen-14 and nitrogen-15 nuclear magnetic resonance (NMR) spectra were recorded for freshly dissected buds of Picea glauca and for buds grown for 3, 6 and 9 weeks on shoot-forming medium. Resonances for Glu (and other aNH2 groups), Pro, Ala, and the side chain groups in Gin, Arg, Om, and 'y-aminobutyric acid could be detected in in vivo 15N NMR spectra. Peaks for aamino groups, Pro, N03and N...

Identification of QTLs associated with resistance to Phomopsis pod blight (Diaporthe toxica) in Lupinus albus

Phomopsis blight in Lupinus albus is caused by a fungal pathogen, Diaporthe toxica. It can invade all plant parts, leading to plant material becoming toxic to grazing animals, and potentially resulting in lupinosis. Identifying sources of resistance and breeding for resistance remains the best strategy for controlling Phomopsis and reducing lupinosis risks. However, loci associated with resista...