‘Ourania’ Walnut

Black Walnut

Impact of Walnut Scale Infestation on Walnut Quality and Yield

A study to mea~ure the effect of walnut scale infestation on English walnut qualityand yield has shown no differences in yield and no consistentdifferencein kernel quality between infested and non-infested trees for the four years ~f the study. Yield and quality of English walnut are not overly sensitive to walnut scale infestation and some degree of infestation can be tolerated with no measura...

Black Walnut Nutrition

______________________________________________________________________________ Abstract: Information on soil and leaf nutrient concentrations for black walnut are of value only when they are properly sampled, accurately analyzed, and the results correctly interpreted. Guidelines for interpreting soil and leaf analyses and leaf symptoms are presented along with recommendations for correcting nut...

Walnut Pollen Studies

investigations were initiated this year to develop field and laboratory viability assays for stored walnut pollen, indentify conditions suitable for in vitro pollen germination and pollen tube growth, and determine pollen tube growth rates in pistillate flowers. Results of this project will provide background information for future investigations of transmission of pollen-borne virus, factors i...

Walnut Research in France

Walnut research in France is carried out by scientists employed by the Centre Technique Interprofessionel des Fruits et Legumes (CTIFL) and the Institute National de la Recherche Agronomique (INRA). (The Association Foret-Cellulose (AFOCEL) which has been active in research on walnut propagation is terminating their walnut project this year.) CTIFL focuses on applied research and technology tra...