SOWING TIME, GIBBERELLIC ACID TREATMENTS AND CULTIVARS OF “SEED” PROPAGATED ARTICHOKE

Two trials were conducted during the period 1989–1991 in southern Italy with the aim of determining the effect of GA₃ on new cultivars of seed-propagated artichokes planted during the summer months.
In the first experiment the cv. 044 was direct-seeded at the end of August.
Single and multiple applications of GA₃ were made 90, 120 and 150 days after sowing (DAS).

In the second experiment the cv. 044 and F₁ hybrids ‘137’, ‘223’ and ‘271’ were seeded in June, July and August in a cold greenhouse and the seedlings were planted into the field about 40 DAS. The GA₃ was applied three times at three week intervals once the plants had 10 – 12 leaves.
Single or double application of GA₃ 90 or 120 DAS provoked an earlier and higher yield.

GA₃ applied to plants transplanted in July provide a high yield and earliness.
The most responsive cultivar to GA₃ was the ‘271’ because the growth regulator was very effective in enhancing head production and in increasing marketable yield.

VII International Symposium on Timing Field Production of Vegetables

A. Elia, N. Calabrese, V.V. Bianco

https://doi.org/10.17660/ActaHortic.1994.371.47