Gummosis and psorosis are destructive bark diseases of Citrus trees found in ttliany groves throughout the state and of such widespread occurrence in certain sections as to cause considerable alarm on the part of growers. Many growers term the disease gummosis when there is a pronounced exudation of gum and scaly bark when there is a dry scaling off of the outer bark without much gum formation....

The antioxidant and antimicrobial activities of the extracts from peel, leaves, and bark of mangosteen (Garcinia mangostana L.), and some essential oils such as cinnamon and citrus were investigated. The antioxidant activities (IC50) of peel, leaves, and bark extracted, which were evaluated by DPPH method, were 5.94, 9.44, and 6.46 μg/ml, respectively. Either cinnamon or citrus essential oil sh...

citrus is one of the most important fruit crops in iran. among the citriculture areas of iran, mazandaran province has the highest acreage (about 100,000 ha), production and number of varieties nationwide. unauthorized importation of citrus species and cultivars and propagation by growers and nurserymen have led to perpetuation and spread of virus, viroid and other graft-transmissible pathogens...

A citrus cDNA encoding a class II acidic chitinase was isolated from a nonembryogenic cell line of sweet orange using the tobacco cDNA clone PROB3. Northern blot analysis revealed that the corresponding mRNA is expressed in young, green bark but not in leaves, roots, or flavedo.

Citrus production is declining worldwide due to several biotic and abiotic factors. The diseases caused by Phytophthora spp. present major economic risks since they are soil-borne spread quickly if environmental conditions favorable, or irrigation poorly managed. species in all citrus-producing areas around the world causing significant losses crop yield affecting tree health. Bark infection, d...

Although citrus is indigenous to southeast Asia, oranges were first planted commercially in central Arizona in the late 1800s. Today commercial production is centered in several warm and low-frost-risk areas of central and southwestern Arizona. A great number of citrus varieties are also widely planted in home gardens. Many diseases of citrus have been described world wide and have colorful and...