Browsing by Author "Ravindran, P.S."
Now showing 1 - 8 of 8
Results Per Page
Sort Options
Item Arecanut yellow leaf disease : Varietal reaction(2007-02-08) Ravindran, P.S.; Nampoothiri, K.U.K.; Pillai, R.S.N.; Chandra Mohanan, R.; Mohammed Sayed, A.A.Item Breeding(2007-02-08) Nampoothiri, K.U.K.; Ravindran, P.S.Item Evaluation of certain oil palm hybrids under rainfed conditions(2007-02) Nampoothiri, K.U.K.; Pillai, R.S.N.; Ravindran, P.S.Results of the first comparative trial of oil palm tenera hybrids (Dura x Pisifera) laid out in 1976 indicated that there are significant differences in performance between various combinations. 65 D x 30.103 P, 120 0 x 30.103 P and 92 D x 30.3154 P out-yielded the other eight combinations. These gave an overall yield of 100 kg fresh fruit bunches (FFB) per palm per year which is equivalent to 3 MT of palm oil per hectare. This is a very encouraging performance under rainfed conditions. The highest average of 164 kg per palm per year (equivalent to 4.6 MT oil) was recorded from the combinations involving 65 D in 1986. The main attribute which contributed to the fresh fruit bunch production was the number of bunches. Though the palms started yielding in the fourth year, appreciable yields were obtained only from the ninth year. There was an abrupt Increase in yield during 1986 fallowed by the declining trend In the subsequent years. Implications of these results are discussed.Item A high yielding selection of black pepper variety : Kottanadan(CPCRI Research center, Palode, 1998) Ravindran, P.S.; Nampoothiri, K.U.K.; Pillai, R.S.N.; Nair, M.K.; Florence GeorgeA critical survey was undertaken in 1982 in the main Kottanadan growing areas of Quilon and Trivandrum districts in Kerala , Based on the general vigour and yield performance, 100 vines were selected preliminarily. Detailed observations were recorded on morphological characters, spike characters as well as Filling percentage. The best 49 selections among the above were multiplied and planted in a completely randomised design (CRD) with two controls viz Panniyur-1 (released variety) and local Kottanadan, with eight replications. The trial was conducted for six years. Among the 49 selections evaluated, selection number 2559 recorded the maximum yield potential of 15200 kg as against 10432 kg by Panniyur-1 and 5552 kg by local Kottanadan green pepper/hectare/year. It also recorded 4.8% essential oil, 15.4% oleoresin and 3.0% pipeline content, Considering the high yield potential and better quality, this selection 2559 (PLD-2) was recommended for release in Trivandrum and Quilon districts of Kerala during 1995.Item Pattern of Genetic Variation in the Reproductive Characters of Coconut(1974) Nambiar, M.C.; Ravindran, P.S.Item Phytosanitary Seed Treatments in Oil Palm Elaeis Guineensis.(2007-02) Kochu Babu, M.; Ravindran, P.S.; Ramachandran Nair, K.The seeds of oil palm harbour several fungi on the mesocarp remnants. To prevent the spoilage of seeds by fungi and to check their spread to new areas (when germplasm introductions are made) the effects of methyl bromide fumigation and five fungicides were tried before preheating the seeds. The seed micro-flora, germination and seedling vigour were monitored. Methyl bromide fumigation reduced germination and had no effect on external microflora. Hence it cannot be recommended for seed treatment. Fungicide treatments increased seed germination and seedling vigour. Wet fungicide treatments with Emisan 6 (Methoxy Ethyl Mercury Chloride) 0.1% and Foltaf 80W (Captafol 80% WDP) 0.2% for 20 min. before preheating were effective in eliminating external microflora and helped in increasing seed germination and seedling vigour. Thus seed treatment with fungicides was the best for phytosanitary treatment of oil palm seeds.Item Stomatal Responses In Arecanut Palms Affected With Yellow Leaf Disease(1995) Chowdappa, P.; Balasimha, D.; Rajagopal, V.; Ravindran, P.S.The stomatal responses of apparently healthy and yellow leaf diseased (YLD) arecanut palms were studied in two different seasons; (a) before symptom expression during May (dry season) and (b) after appearance of visible symptoms during October (wet season); and at different times of the day at two diseased areas such as Sullia and Palode. During wet season the leaves of diseased palms had higher stomatal resistance and water potential than apparently healthy palms while the transpiration rate was significantly reduced. The stomata of the diseased palms remain closed through most of the day in the wet season. During dry season these changes between the apparently healthy palms and diseased palms were not discernible.Item Strategies For Self Sufficiency In Indigenous Oil Palm Seed Production(1993) Nampoothiri, K.U.K.; Pillai, R.S.N.; Ravindran, P.S.