Effect of Paclobutrazol on Flowering, Fruiting and Yield of Cashew (Anacardium occidentale L.) in West Coast Region of Karnataka

Abstract

An investigation was carried out for three consecutive years 2011-13 years to study the influence of Paclobutrazol (PBZ) on flowering, fruiting and yield of cashew cultivar ullal-3. The various doses of paclobutrazol i.e. 1.0, 2.0 and 3.0 g a.i., per plant was applied as soil drench annually, biennially and once in three years in the month of October before vegetative flushing of plants. The application of paclobutrazol @ 2.0 g a.i per plant found effective in improving flowering and fruiting parameters of cashew. The sex ratio ranged from 0.17 to 0.27 percent in treated plants while in untreated plants it was 0.15 to 0.21 percent. The number of flower panicles per plant ranged from 53.5 to 68.4 in treated plants while in untreated plants it was 53.5 to 62.7. The length and width of flower panicles ranged from 11.6 to 17.3 cm and 16.5 to 23.3 cm respectively, in treated plants while, in untreated plants, 17.1 to 18.1 cm and 22.8 to 23.6 cm respectively. The PBZ treated plants recorded nut length of 3.0 to 3.3 mm, nut width of 2.4-2.5 mm, nut weight of 6.63 to 7.56 g and nut volume of 6.84-7.74 cc while in untreated plants nut length of 3.0 to 3.2 mm, nut width of 2.4-2.5 mm, nut weight of 7.02 to 7.36 g and nut volume of 7.25-7.64 cc respectively. The average yield of treated plants ranged from 0.76 kg to 1.13 g/plant while, in untreated plants nut yield of 0.67 to 0.73kg per plant.

Effect of Girdling and Paclobutrazol on Growth, Plant Physiology, Inflorescence and Fruiting of Mangifera indica cv. Harumanis in Agroclimatic-Zone 3 of Peninsular Malaysia

“…However, the cell elongation is interrupted. As a result, the synthesized internode is compressed and shorter in length [29][30][31]. The same is true for girdling; when photoassimilates are restricted on girdled branches, only changes in shoot length are visible.…”

An overview of canopy management in cashew (Anacardium occidentale L.)

“…In cashew, due to non-availability of dwarf clones and dwarfing rootstocks, use of growth retardants like paclobutrazol (PBZ) assumes importance. Hence, a study was aimed to evaluate the morpho-physiological responses of cashew to PBZ treatments under field trials (Meena et al, 2018;Babli et al, 2019). The PBZ treatments resulted in reduced vegetative growth and enhanced reproductive growth with most striking responses of PBZ @3 g a.i./tree treatment.…”

“…Heavy pruning promotes excessive vegetative growth and often reduces the yield due to the dense canopy with reduced flowering (Balamohan et al, 2016). The application of plant growth retardants such as paclobutrazol (PBZ) has been found useful in the manipulation of vegetative growth, vigour and yield of cashew (Meena et al, 2018;Babli et al, 2019). The optimized application of PBZ helps to obtain maximum benefit with minimum undesirable impact on food and environmental safety aspects (Kishore et al, 2015).…”