Rooting of soft and semi-hard wood cuttings of guava as affected by IBA
1992
Ayyash, N.M.N.
The present investigation was carried out to study the effect of time taking cuttings, various indolebutyric acid concentration, and cutting type on rooting percentage, number of roots, root length, and shoot length after 6, 8, and 12 weeks, and after 4 - 8 weeks of planting for semi-hard wood and soft wood guava cuttings, respectively, during 1989-1990. The result indicated that the second collecting date (Jan 15, 1990) for semi-hard wood, and soft wood cuttings (Jul 15, 1990), gave the greatest average rooting percentage and the longest average shoot length. Moreover, the second collecting date resulted in the greatest number and the longest roots per cutting. The best time for taking semi-hards and soft wood cuttings was January and July respectively. The use of IBA improved the success of guava cuttings, average number of roots, average root length, and average shoot length. Treating semi-hard wood cuttings with IBA 1000 ppm or soft wood cuttings with 4000 ppm produced significantly higher percentage of rooted cuttings, greatest number of roots per cutting, and the longest length of roots. The differences in average rooting percentage, average root length, and average number of roots, as influenced by different IBA treatments were statistically significant. Rooting was obtained after six weeks in semi-hard wood cuttings and 4 weeks after planting in soft wood cuttings. No rooting was observed in the control (untreated cuttings). It was observed that soft wood guava cuttings surpassed in their rooting capacity the semi-hard guava cuttings
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