Browsing by Author "Anandaraj, M."
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Item Disease surveillance on Koleroga of arecanut caused by Phytophthora arecae(2007-02-08) Anandaraj, M.; Saraswathy, N.Koleroga of arecanut occurs during south wast monsoon in all the areca growing areas where there is heavy rainfall, high humidity and a temperature range of 22-29°C. To study the correlation between the climatic factors and occurrence of the disease in different areas a proforma was evolved and the information was collected. The disease appeared 12-20 days after the onset of monsoon in different areas under favourable conditions. There was no indication to show that the disease spreads from one area to another.Item Diversity of phytophthora affecting horticultural crops in India(2012) Anandaraj, M.Item Effect of climatic factors on Phytophthora leaf infection in black pepper grown in arecanut-black pepper mixed cropping system(2007-02-08) Ramachandran, N.; Sarma, Y.R.; Anandaraj, M.; Jose AbrahamEffect of climatic factors on the occurrence of foliar infection in black pepper caused by Phytophthora palmivora MF4 was studied during the years 1984-86 in arecanut-black pepper mixed cropping system. The correlation studies between the disease recorded at weekly intervals and the meteorological factors prevailing during the preceding seven days showed a positive correlation between the rainfall, number of rainy days and relative humidity whereas temperature and sunshine hours had a negative correlation. Average climatic factors worked out during increasing and decreasing phases of the disease showed that factors such as low temperature (22.7-29.6°C), shorter duration of sunshine (2.8-3.5 h/day) high rainfall (15.8-23.Omm/day) and high relative humidity (81-99%) contributed to the increase n disease.Item Effect of systemic fungicides on fruit rot of arecanut(2007-02-08) Anandaraj, M.; Saraswathy, N.Item Estimates on the extent of loss due to quick wilt disease of black pepper (Piper nigrum L.) in Calicut district of Kerala(2007-02) Balakrishnan, R.; Anandaraj, M.; Nambiar, K.K.N.; Sarma, Y.R.; Brahma, R.N.; George, M.V.A survey was conducted in Calicut district of Kerala State (India) to assess the extent of loss in yield due to quick wilt disease of black pepper. The study was conducted for a period of three years (1982-1984) and it was estimated that on an average about 1,88,900 vines perish due to quick wilt disease per year and the consequent yield loss amounting to about 119 metric tonnes of black pepper per year. It was also estimated that a total of 11 % of plants were lost due to the disease during the course of three years (1982-1984)Item Foliar Yellowing and Root Rot in Coconut Seedlings Caused by Phytophthora Sp.(1993) Sarma, Y.R.; Nambiar, K.K.N.; Anandaraj, M.Item Growth and nutrient content of black pepper (Piper nigrum L.) cuttings as influenced by inoculation with biofertilizers(2000) Kandiannan, K.; Sivaraman, K.; Anandaraj, M.; Krishnamurthy, K.S.Experiments conducted to test the effect of Azospirilhim, phosphobacteria and vesicular arbuscular mycorrhiza on growth and nutrient content of black pepper (Piper nigrum) cuttings indicated that growth parameters were on par with control when these three biofertilizers were applied individually, but their combination enhanced growth significantly over control. Inoculation with a combination of two/three biofertilizers enhanced plant height, leaf area, biomass and dry matter production and nutrient content significantly over uninoculated control.Item Koleroga of Arecanut(2007-02) Koti Reddy, M.; Anandaraj, M.Item On the Mechanism of Spore Dispersal in Phytophthora arecae, the causal organism of Koleroga of Arecanut(2007-02) Anandaraj, M.The fruit rot or Koleroga caused by Phytophthora arecae occurs in epidemic proportions during south west monsoon season. The secondary spread of the pathogen is by sporangia produced abundantly on the infected fruits. To study the dispersal of sporangia. Hirst volumetric spore trap, bidirectional and multidirectional splash traps were used. The sporangia were liberated and spread mainly by rain splashes.Item Phyllody Disease of Black Pepper (Piper nigrum L.)(2007-02) Sarma, Y.R.; Solomon, J.J.; Ramachandran, N.; Anandaraj, M.Item Plantation crops for socio-economic upliftment(2014) Krishna Kumar, N.K.; Janakiram, T.; Anandaraj, M.; Lijo ThomasItem A Sampling Procedure to Assess the Yield Loss Due to Koleroga of Arecanut Palm (Areca catechu L)(2007) Anandaraj, M.; Balakrishnan, R.Item Scope and role of PGPR in cropping systems in Plantation crops and Spices in relation to their Agronomy and Pathology(2003-10) Sarma, Y.R.; Krishnakumar, V.; Anandaraj, M.Item A Simple Method to Determine the Surface Area of Areca Fruits (Areca catechu Linn.)(1983) Anandaraj, M.; Bhagavan, S.Item Studies On Phytophthora Diseases Of Cacao Occurring In India(1979) Chandra Mohanan, R.; Anandaraj, M.; Yateendra JoshiThe phytophthora diseases of cacao (Theobroma cacao L.) so far reported from India are: black pod, canker and sseedling die back. Twig dieback and chupon blight of cacao caused by Phytophthora palmiovra (Butler) Butler were severe in Kerala and Karnataka states of India. The fungus was isolated and its pathogenicity was proved. The symptoms of these diseases are described. This is the first reported occurrence of twig die back and chupon blight of cacao caused by P. palmivora from India. In cross inoculation studies, the P. palmivora isolate from cacao did not infect areca palm fruits, neither did the Phytophthora arecae (Coleman) Pethybridge isolated from mahali affected fruits infect cacao pods. P. palmivora is the most destructive of all the fungal pathogens attacking cacao in India and requires regular prophylatic measures. Ten fungicides were evaluated using detached cacao pods against P. palmivora of cacao. Among them, captafol (Difolatan 80W) at 0.2% and copper oxychloride (Cupramar), guazatine (Panoctine) and fenfuram (Panoram) each at 0.3% inhibited lesion development on pods completely.