None (In the course of studies about fungi associated with pistachio (Pistacia vera L.) die-back disease in the Ghaen region of south Khorasan (Iran), one species of Geosmithia was found. The isolates were identified as Geosmithia lavendula (Raper & Fennel I) Pitt based on its morphological and molecular properties. The genus Geosmithia (Ascomycota: Hypocreales) is belonging to mitosporic filame...

We examined interrelationships between crop load, nitrogen (N), phosphorus (P), and potassium (K) uptake, and root growth in mature, alternate-bearing pistachio (Pistacia vera L.) trees. Pistachio trees bear heavy (on-year) and light (off-year) fruit crops in alternate years. Uptake and partitioning of N, P, and K among tree parts were determined during (a) spring flush (mid-March to late May),...

Pistachio produces an abundant number of inflorescent buds every year (during spring and early summer) which abscise mainly on fruiting branches during seed development. Competition of the developing ovaries/seeds with inflorescent buds for nutrients was suggested as being primarily responsible for bud abscission. Although leaf N correlated with bud retention, foliar application of N did not re...