Occurrence of pvs. actinidiae, actinidifoliorum and Other Strains on Kiwifruit in Northern Spain.

pv. actinidiae (Psa), the agent causing bacterial canker of kiwifruit, has been present in the Principality of Asturias (PA), Northern Spain, since 2013, although with restricted distribution. In this study, 53 strains collected in kiwifruit orchards in PA during the period 2014-2020 were characterized by a polyphasic approach including biochemical and phylogenetic analysis.

First report of Neopestalotiopsis sp. causing trunk disease on European chestnut in Spain.

In April 2021, a brownish-brown vascular lesion was observed in the stemwood of a five-year-old chestnut (Castanea sativa Mill.) rootstock when cutting for grafting in Villaviciosa (Asturias, Northern Spain). To identify the causal agent, a cross section of the steam was cut, surface-sterilized with 96% ethanol and dried, plated on potato dextrose agar (PDA) and incubated at 25ºC.

Hot water treatment: an effective method for disinfecting Castanea sativa mill. dormant scions against Dryocosmus kuriphilus Yasumatsu.

Background: The Asian chestnut gall wasp (ACGW) Dryocosmus kuriphilus Yasumatsu is the most severe pest of the genus Castanea worldwide. After its arrival in Europe, the insect dispersed rapidly from Italy to other European countries, as well as spreading over long distances within each country because of the unintentional transport of infested chestnut material owing to the fact that infestation inside the dormant buds is visually undetectable. Hot water treatment (HWT) has been tested in terms of pest and diseases control in propagation processes with a wide range of plant material and species, including the Asian chestnut Castanea mollissima cv 'Qing'.