Studies of "Declinamiento" in Citrus in the Northwest of Argentina

Abstract

I n 1974, declining citrus plants were observed in the northern part of Salta province with symptoms similar to "blight" of Florida and to "fruta bolita" of Misiones. Due to the damage observed and the danger of spread in the region, INTA, EERA, Famailla started studies to determine the identity of the disease, its causes and possibilities of control. This paper reports information on distribution and spread of the disease, citrus combinations affected, relationships with soil and nutritional factors, nematode and fungus occurrence and transmission tests.