DSpace Repository :: Browsing by Author "Wilson, K I"

The compatibility of insecticides and fungicides commonly used for the control of insect pest and disease of rice was studied in the laboratory using Nilaparvata lugens and Rhizocfonia sdanl as lest organisms. By fixing the proportion of constituents in the insecticidal, fungicidal mixture judiciously, it may be possible to reduce the field dose of insecticide as there was synergism in the insecticidal activities of lower dose of quinalphos when combined with different doses of fungicides. The fungicidal effectsof the three fungicides were signifcantly altered when combined with insecticides. Combination with fungicides showed an antagonistic effect at higher levels of captofol, ediphenphosand carbendazim, while at lower concentrations there was enhancement of fungicidal effect.

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Design, fabrication and testing of a savonius type windmill with a deflector augmentor

(Department of Farm Power Machinery and Energy, Kelappaji College of Agricultural Engineering and Technology, Tavanur, 1989) Satyajith Mathew; Wilson, K I

The study was conducted with the objectives of developing and testing a savonius wind mill and analysing the effect of a deflector augmentor on the performance characteristics of the rotor. The wind mill was consisted of two rotors of 2 m x 3 m size fixed one below the other at 90 degree out of phase. A 100 mm galvanised iron pipe of 12 m length acts as the shaft. The shaft passes through two ‘30220’ taper roller bearings. Lower bearing was fixed on a I m x I m x I m foundation and the upper bearing was positioned by four 4 mm guy wires. The guy wires were equidistant and forms an angle of 45 degree with the shaft. This wind mill was tested under field conditions. Power developed by the wind mill was calculated by measuring the torque and rotor speed, and power delivered to the rotor was calculated by taking corresponding wind velocity. The coefficient of power and coefficient torque were calculated for different tip speed ratios. The wind mill was found to attain a maximum coefficient of power 0.155 at a tip speed ratio 1.0. Maximum torque coefficient attained was 0.185 at a tip speed ratio 0.75 Optimum tip speed ratio of the wind mill was found to be in a range of 0.5 to 0.9. A deflector augmentor of 6.93 m2 effective wind facing area was fixed at an angle of 60 degree with the wind direction. Wind mill was again tested with the deflector augmentor. Power coefficient was found to attain a maximum value of 0.32 at a tip speed ratio 1.54. The maximum torque coefficient was 0.385 at a tip speed ratio of 0.56. Optimum tip speed ratio of the wind mill with the deflector augmentor was found to be in a range of 0.5 to 1.5. When the deflector augmentor was attached to the wind mill, power coefficient was increased by 106.5 percent and torque coefficient was increased by 108 percent. The wind mill was found to work in higher tip speed ratios. The cut in velocity was reduced from 2.4 m/s to 1.4 m/s. Cost of operation of the wind mill was Rs.1.45 per bhp.hr which is comparable with diesel and electric power.

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Deterioration of copra by fungi

(Kerala Agricultural University, 1980) Unnikrishnan Nair, P K; Samraj, J; Wilson, K I

Fungi Aspergiltus niger, Aspergiltus sp., Penicillum sp., Rhizopus, sp., Diplodia sp. and Trichoderma sp. were isolated from copra samples. These fungi grew on copra and caused reduction in oil content under artificial inoculation Except Rhizopus sp. all the organisms grew well in Richard's solution containing coconut oil as carbon source. Trichoderma sp. has not been reported on copra so far.

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Deterioration of oil cake by fungi

(Department of Plant Pathology, College of Agriculture, Vellayani, 1989) Naseema, A; Wilson, K I

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Effect of bunchy top virus infection on the chemical constituents of banana fruits

(Kerala Agricultural University, 1971) Jose, P C; Balagopal, C; Wilson, K I; Nambiar, B P

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Effect of bunchy-top virus infection on the carbohydrate and nitrogen contents of banana leaves

(Kerala Agricultural University, 1972) Balakrtshnan Nair, P K; Wilson, K I

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Effect of bunchy.top virus infection on the free amino acid and amide composition of banana leaves

(Kerala Agricultural University, 1970) Balakrishnan Nair, P K; Wilson, K I

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Effect of substrate in producing aflatoxin

(Kerala Agricultural University, 1993) Naseema, A; Wilson, K I

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Effect of yellow vein mosaic virus infection on the phyllosphere microflora of bhendi (Abelmoschus esculentus W And A) plants

(Kerala Agricultural University, 1974) Potty, V P; Wilson, K I

Phyllosphere microflora of yellow vein mosaic virus inoculated and healthy bhendi plants have been studied at different stages of growth. The middle and bottom leaves of infected plants showed significantly lower population of fungi than the corresponding leaves of healthy plants. The bacterial population on the middle leaves of infected plants was significantly higner than that of the healthy. The differences between the actinomycete population on the leaves of healthy and infected plants were not sign-ficant. The middle leaves of infected plants showed significantly higher total microbial population than those of the healthy ones. The differences in microbial population between leaves of healthy and diseased plants is attributed to the changes in host physiology caused by virus infection.

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Effect of yellow vein mosaic virus infection on the phyllosphere microflora of bhendi (Abelmoschus esculentus W. and A.) plants

(Kerala Agricultural University, 1974) Potty, V P; Wilson, K I

Phyllosphere microflora of yellow vein mosaic virus inoculated and healthy bhendi plants have been studied at different stages of growth. The middle and bottom leaves of infected plants showed significantly lower population of fungi than the corresponding leaves of healthy plants. The bacterial population on the middle leaves of infected plants was significantly higner than that of the healthy. The differences between the actinomycete population on the leaves of healthy and infected plants were not sign-ficant. The middle leaves of infected plants showed significantly higher total microbial population than those of the healthy ones. The differences in microbial population between leaves of healthy and diseased plants is attributed to the changes in host physiology caused by virus infection.

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Field evaluation of fungicides against Diplodia dry rot of guava fruits

(Kerala Agricultural University, 1972) Rajagopalan, B; Wilson, K I

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Fungal diseases of certain medicinal plants in Kerala

(Department of Plant Pathology, College of Agriculture, Vellayani, 1988) Sankaranarayana Sarma, S; Wilson, K I

A survey was conducted in three localities of Trivandrum district, viz. College of Agriculture,Vellayanl, Tropical Botanic Garden and Research Institute, Palode and Post-Graduate-cum-Research Centre in Ayurveda, Pooja- ppura, to study the fungal diseases of ten important medicinal plants. Colletotrichum qloeosporioides. C. capsici. Curvularia clavata, Curvularia lunata.Botrvodiplodia theobromae. Fusarium moniliforme var. intermedium. Uromvces sparqanii ssp. asiaticus and Puceinia sp. were found infecting the plants. The above fungi, except Uromvces sparqanii ssp. asiaticus and Puceinia sp. were isolated in pure culture and pathogenicity to their respective host plant established by artificial inoculation. The effect of five artificial culture media on the growth and sporulation of the pathogens was studied. Czapek’s-Dox agar and Richard’s agar were found to be favouring good growth and sporulation of all the fungi.

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Fungal flora of Kerala II

(Kerala Agricultural University, 1970) Peethambaran, C K; Wilson, K I

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Fungicidal control of fruit rot of chilli caused by colletotrichum capsici (Syd.) Butl. & Bisby

(Kerala Agricultural University, 1992) Sulochana, K K; Rajagopalan, B; Wilson, K I

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Growth of cylindrocladium quinqueseptajum on different oil incorporated medfa

(Kerala Agricultural University, 1983) Sulochana, K K; Wilson, K I; Chandrasekharan Nair, M