Abstract

The pistachio (Pistacia vera) male cultivars 02-16 and 02-18 showed higher levels of Botrytis blossom and shoot blight caused by Botrytis cinerea, had more inflorescences 1 mo after blooming, and retained more inflorescences 10 mo after blooming than did the cultivar Peters. When shoots were inoculated, more shoots of 02-16 and 02-18 than of Peters became blighted, and significantly larger cankers developed. Inoculation of inflorescences with either a spore suspension or mycelial plugs of B. cinerea caused more shoots on 02-16 than on Peters to become blighted, and cankers that originated from the inoculated inflorescences were significantly larger on 02-16. In both experiments (inoculation of shoots and inflorescences), the cultivar 02-18 was intermediate in susceptibility to infection by B. cinerea (.)

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