Evidence has shown that drought-induced crown dieback significant interaction with soil-plant water and nutrients relationships, but there isn’t sufficient knowledge of the connections in declining Persian oak (Quercus brantii) trees. To investigate relationships between leaf concentrations, content, soil concentrations mois­ture, one affected stands was selected. This stand located Shalam fore...

Starting in 2012, severe diebacks usually accompanied by abundant gum exudation have occurred on yuzu trees in Goheung-gun, Jeonnam Province, where severely affected trees were occasionally killed. On-farm surveys were conducted at 30 randomly-selected orchards located at Pungyang-myeon, Goheung-gun, and the resulting disease incidences were 18.5% and 39.6% for dieback and gumming symptoms, res...

Grapevine trunk diseases: Eutypa dieback, esca and Botryosphaeria dieback, which incidence has increased recently, are associated with several symptoms finally leading to the plant death. In the absence of efficient treatments, these diseases are a major problem for the viticulture; however, the factors involved in disease progression are not still fully identified. In order to get a better und...

In Alaska, an unprecedented dieback and mortality of Alnus incana ssp. tenuifolia has occurred which stimulated an effort to determine causal agents of the disease. In Europe, similar dieback and mortality of Alnus incana and Alnus glutinosa has been attributed to root rot by a spectrum of newly emergent strains in the hybrid species Phytophthora alni. The variable hybrids of P. alni were group...

Even though survival rates for mangrove restoration in Vietnam have often been low, there is no information on fungal pathogens associated with decline Vietnam. Therefore, this research was undertaken to assess the overall health of afforestation Thanh Hoa Province and tree decline. From a survey 4800 Sonneratia trees, incidence disorders order pink leaf spot > shoot dieback black S. caseola...

Leaf scorch, top dieback, and lethal bole cankers were found in two progeny tests of sycamore in Mississippi. Both tests indicated that southern seed sources are more disease resistant than northern seed sources and that some progenies within seed source have even greater resistance. Although eight organisms associated with one or more of the disease symptoms were identified, determination of t...