2. Institutional Publications
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Item Fruit rot of bitter gourd(Kerala Agricultural University, 1980) Sukumara Varma, A; Abi Cheeran; Peethambaran, C KItem Nutrient requirements of pepper vines trained on live and dead standards(Kerala Agricultural University, 1981) Mohan Kumar, B; Abi CheeranA trial was conducted at the Kerala Agricultural University Main campus, Vellanikkara, in orderto study the nutrient requirement of pepper vines grown on live and dead standards. It was found that dead standards significantly out-yielded the liveones. Also it was observed that for the dead standards, application of 75g N and 50g P203/vine/year would be the optimum.Item Sporangial ontogeny of Phytophthora Palmivora (Butler) butler from black pepper (Piper Nigrum Linn.)(Kerala Agricultural University, 1985) Manomohan Das, T P; Abi CheeranThe Phytophthora species collected from black pepper from the different locations of north Kerala showed similar morphological characters and were identified as Phytophthora palmivora (Butler) Butler. Based on the growth characteristics on carrot agar, L/B {length by breadth) ratio and pedicel length of the sporangium all the black pepper isolates of P. pa/mivora obtained in the present investigation can be placed in MF1 or MF2 or MF3 (Griffin, 1977) or group I or II (Zentmyer et ai., 1977) due to the overlapping of characteristics described for them.Item Infectivity of Phytophthora species on cash crops of Kerala(Kerala Agricultural University, 1986) Manomohan Das, T P; Abi CheeranThe Phytophthora species infecting black pepper, arecanut, rubber, cocoa, coconut and cardamom in the northern districts of Kerala exhibited similar morphological characters and were identified as Phytophthora palmivora (Butler) Butler. Onl/cardamom and rubber isolates produced sexual structures on culture media. Cross inoculation studies with all these isolates yielded successful results.Item Witches' broom disease of Stachytarpheta indica Vahl.(Kerala Agricultural University, 1987) Ravi, S; Sally K Mathew; Abi CheeranItem 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 Necrotic streak - A symptom of kokkan disease of banana(Kerala Agricultural University, 1992) Ravi, S; Vilasini, T N; Beena, S; Abi CheeranItem Medium for in vitro production of toxins by Phytophthora Capsici from black pepper(Kerala Agricultural University, 1994) Vilasini, T N; Abi CheeranItem Technique for the separation of the whole embryo of rice grains for the detection of fungal mycelium(Kerala Agricultural University, 1972) Abi Cheeran; Sam Raj, JItem Leaf and stem blight of japanese mentha caused by Corynespora casiicola (berk. & curt.) wei.(Kerala Agricultural University, Vellanikara, 1968) Abi Cheeran