ISHS Acta Horticulturae 586: IV International Symposium on Olive Growing
EFFECT OF SPRAY SOLUTION CONCENTRATION, ACTIVE INGREDIENT, ADDITIVES AND SEQUENTIAL TREATMENTS OF NAPTHALENE ACETIC ACID FOR CHEMICAL THINNING OF MANZANILLO TABLE OLIVES (OLEA EUROPEA) |
| Authors: | W.H. Krueger, Z. Heath, B. Mulqueeney |
| Keywords: | plant growth regulator, concentrate and dilute spray |
| Abstract:
During 1997 and 1999 Manzanillo (Olea europea) olive trees in the Sacramento Valley treated with a dilute spray of 3740 l/ha of water and 150 ppm (574 g ai/ha) of NAA were compared to varying concentrations of NAA in a concentrate spray of 935 l/ha, with and without spray adjuvant, and 1% spray oil. Additionally, sequential thinning sprays 3 or 6 days after the initial treatment were tested for additive thinning. Concentrate sprays were as effective as the dilute spray. Active ingredient of 287 g ai/ha or less resulted in reduced thinning response than the best treatments. Neither the spray adjuvant or spray oil increased the thinning response. Sequential sprays resulted in an additive thinning. | |
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