2. Institutional Publications
Permanent URI for this communityhttp://localhost:4000/handle/123456789/96
Browse
11 results
Search Results
Item Role of rain water in the pollination of pepper (Piper nigrum Linn.)(Kerala Agricultural University, 1977) Sreekumari Amma; Vijayagopal, P DItem Effect of training and pruning trials on the yield of pepper(Kerala Agricultural University, 1977) Sivan Pillai, KItem Effect of variety, spacing and support material on nutrition and yield of blackpepper (Piper Nigrum L.)(Kerala Agricultural University, 1992) Abi Cheeran; Wahid, P A; Kamalam, N V; Sajan Kurien; Lyla MathewA field experiment was conducted with two varieties of black pepper to study the influence of spacing and type of support (standard) on nutrition and yield. During a six year period since planting, soil chemical characteristics were not influenced by variety, spacing and type of standard. The variety Karimunda accumulated more K, Ca and Mn in the leaf compared to Panniyur-1. A depressing effect on foliar Ca level was noticed in vines trailed on Garuga pinnata. Closer spacing down to 2 m x 2 m did not affect the vine yield adversely. Three to four-fold increases in yield were obtained by trailing the vines on teak pole instead of on trees. The decrease in yield of the vine trailed on Erythrina indica and Garufa pinnata as compared to that on teak pole (non-living standard) was discussed in the light of probable competitive interactions between the crop vine and support tree as in mixed cropping system.Item Effect of growth substances on rooting of planting materials in black pepper (Piper nigrum L.)(Kerala Agricultural University, 1993) Gigi Francis; Aravindakshan, M; Gopikumar, K; Valsalakumari, P KThe study revealed lhat all types of planting materials treated with IBA 1000 ppm were superior wilh regard to rooting percentage and other root growth parameters such as number, length, fresh weight and dry matter production of roots. Regardless of the growth substance treatments, mist had pronounced influence on root growth in all the planting materials. All types, except laterals, rooted readily during March; but laterals recorded maximum rooting during June, though there was not much difference among the planting materials with regard to their rooting ability, laterals were shy rooters and produced roots only after six weeks of planting while all the other types produced roots readily within three weeks of planting.Item Seed germination studies in panniyur-1 black pepper(Kerala Agricultural University, 1993) Ibrahim, K K; Sukumara Pillai, V; Sasikumaran, SItem Influence of plant characters on yield in black pepper (Piper nigrum L.)(Kerala Agricultural University, 1995) Sujatha, R; Namboodiri, K M NData on 580 genotypes of black pepper were .utilised to estimate the correlations among yield and 20 quantitative characters. The results revealed that the reproductive characters viz., green spike yield per vine, green berry yield per vine, number of spikes per vine and number of under-developed berries per spike as well as the vegetative characters, thickness of node and intemode of orthotrope and angle of insertion of plageotrope are positively and significantly correlated with yield. The inter-correlations among these characters were also positive and significant. Path analysis revealed positive direct effect on yield by the characters green berry yield, spike number, spike length and angle of insertion of plageotrope. The effect of the remaining characters on yield were due to their indirect influence through other component characters.Item Heterosis in black pepper (Piper nigrum L.)(Kerala Agricultural University, 1995) Sujatha, R; Namboodiri, K M NA study was conducted to estimate heterosis in F, hybrids of black pepper with respect to yield and three reproductive characters using 45 hybrids belonging to eight different intervarietaJ combinations of crosses planted at the Pepper Research Station, Panniyur. One of the hybrids, viz. Culture 4968 belonging to the cross Uthirenkotta x Balankotta was found to exhibit high heterosis with respect to all the characters. Promising parental combinations were, Uthirenkotta x Cheriyakaniakkadan and Karivilanchy x Cheriyakaniakkadan. The combinations Uthirenkotta x Kottanadan, Uthirenkotta x Kuthiravaly and Panniyur 1 x Karimunda were found least promising.Item Screening of black pepper (Piper nigrum L.) calliclones for phytophthora foot rot resistance / tolerance(Kerala Agricultural University, 1996) Shylaja, M R; Sreekandan Nair, G; James MathewCalliclones of different black pepper cultivars viz., Kalluvally, Cheriakanyakkadan, Balankotta, Karimunda and Panniyur-1 were regenerated from calli, screened against toxic metabolite(s) of Phytophthora capsici. The regenerants derived from screened and unscreened calli were further tested for resistance / tolerance to P. capsici using different methods of screening viz., natural screening (keeping in infected field), screening by electrolyte leakage method and screening by artificial inoculation with culture disc of P. capsici. None of the regenerated calliclones was found to be completely resistant to the disease in natural screening. However, some of the regenerants derived from unscreened calli exhibited higher degree of tolerance to the disease revealing the possibility of exploiting somaclonal variation for Phytophthora foot rot disease screening in black pepper. The calliclones of Cheriakanyakkadan recorded greater degree of tolerance to the disease as compared to others.Item Degradation of mancozeb residues in pepper and the effect of processing on the removal of residues(Kerala Agricultural University, 1997) Naseema Beevi, S; Thomas Biju Mathew; Visalakshi, A; Nalina Kumari, TItem Effect of toxic metabolite(s) of phytophthora capsici on various stages of morphogenesis of black pepper calli(Kerala Agricultural University, 1997) Shylaja, M R; Sreekandan Nair, GThe effect of toxic metaholite(s) of Phytophthora capsici on various stages of morphogenesis of black pepper calli was studied. The survival rate of the call! in toxin medium was influenced by the varieties / cultivars used for the study. Once the calli survived in the toxin medium, the toxic tnetabolite(s) did not inhibit further growth of the calli. The shoot proliferation and elongation were also not influenced by the metabolite(s) in the media. However, the root growth was affected adversely.