Mário Ojima

Early fall of persimmon fruits associated to Aceria diospyri K. (Acarina Eriophyidae) infestation

Early fall of persimmon (Diospyrus kaki L.) fruits, of the Fuyu variety, is an important problem in Sao Paulo State and seems to be partially related to a heavy infestation of the mite Aceria diospyri K. (Acarina: Eriophyidae) which lives under the fruit buttons. The role of the mite in the fruit fall was investigated through its control using Sevin 85 PM. Three spraying with monthly interval, beginning after petal fall, at the dosage of 2g/l, produced an absolute control of the mites and increased the fruit setting of the Fuyu variety by 16%, 10% and 25% in the 1967/68, 1968/69 and 1969/70 crop season, respectively.

Influência da época e profundidade de plantio no enraizamento de estacas de figueira

A study of rooting of fig tree cuttings was made in five successive times of planting as from May 1966 on. For each time two depths of planting the cuttings were used: 1 - burying up to 4/5 of their length; 2 - burying only half the length. The trial has shown that in all planting times the deeper the cuttings were planted the better were the rooting rates. The percentage of rooting decreased gradually the later the planting of the cuttings was done.

Intensidade de desbaste dos frutos da nespereira

). A nespereira (Eriobotrya japonioa Lindley) tem o habito de produzir numero elevado de frutos, de modo que o seu desenvolvimento natural resulta em produto de baixo valor comercial. Os poucos autores que trataram da cultura dessa frutifera mencionam a conveniencia de reduzir a carga dos frutos, porem, uns nao definem a intensidade com que deve ser feito o desbaste, outros indicam-na sem uma comprovacao experimental. Assim, Bailey (

Violet stain of loquat (Eriobotrya japonica) and its relation to flower thrips, the bug Sphictyrtus chryseis and the mite Eriophyes eriobotryae

A mancha-arro-xeada e um dos principais problemas para comercializacao da nespera no Estado de Sao Paulo, pois prejudica a aparencia dos frutos, fazendo cair verticalmente a cotacao dos precos do produto no mercado. Sabe-se que os insetos e acaros podem ser agentes causadores de manchas em diferentes especies frutiferas (