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Rohini Iyer
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IMPORTANT DISEASES OF COCONUT IN INDIA K. K. N. Nambiar; Rohini Iyer
International Coconut Community Journal Vol 4 No 02 (1988): CORD
Publisher : International Coconut Community

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37833/cord.v4i02.216

Abstract

Today India stands at the third position as far as the world situation of coconut production is concerned. Coconut occupies 1.1. million hectares of land producing 6,887 million nuts in this country. In the southern part of the country viz. Kerala, Kamata­ka, Tamilnadu and Andhra Pradesh, coconut is a very good source of income and these states account for most of the production of coconut. In spite of the importance it has in India's economy, the productivity of the crop is low. Although many factors are res­ponsible for the poor yields, the most important of these are the diseases that attack these palms and affect their productivity. Among these diseases, a few are killers while others are slow and debilitating in nature. For some of them the cause is known while the aetiology of some others is still elusive. This review envisages in discussing some of the recent research trends in the major diseases of coconut in India.
CURRENT STATUS OF RESEARCH ON THE STEM BLEEDING DISEASE OF COCONUT IN INDIA KKN NAMBIAR; ROHINI IYER
International Coconut Community Journal Vol 7 No 02 (1991): CORD
Publisher : International Coconut Community

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37833/cord.v7i02.250

Abstract

Stem bleeding disease of coconut was reported from India in 1922 by Sundaraman. Earlier Petch (1906) had reported the disease from Sri Lanka. Now the disease is known to occur in many coconut growing countries (Ohler, 1984).
Bud rot disease of coconut in relation to endemic spots in Kerala state, India Rohini Iyer; A. R. Rasmi
International Coconut Community Journal Vol 21 No 1 (2005): CORD
Publisher : International Coconut Community

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37833/cord.v21i01.394

Abstract

In India bud rot is quite common on the West and East Coast tracts. A random survey on bud rot disease of coconut, caused by Phytophthora palmivora But.l, carried out in Kasaragod, Kannur and Calicut districts of Kerala revealed that, there is correlation between the disease incidence and the location of the palms. The disease incidence was high in the hilly tracts when compared to that of the plains. Studies on the survival of P. palmivora propagules in nature revealed that the pathogen survives in the crown, soil and roots of healthy and diseased palms. However, the percentage of survival was high in the endemic areas-Mandapam (Kasaragod District), Josegiri (Kannur Dist.) and Kuttiadi (Kozhikode Dist.), both in the case of diseased and healthy palms compared to that of areas with lesser disease incidence. The temperature and humidity in the coconut growing tracts of hilly areas of Kasaragod, Kannur and Kozhikode districts are suitable for the survival of the pathogen in the crown during almost all months, resulting in the high frequency of disease incidence during monsoon season and continued infection up to January. Examination of the rain water collected from bud rot affected coconut gardens also indicated that the pathogen surviving in the crown debris can act as a source of inoculum, which spreads to the neighboring palms through rain splashes. Based on the weather data it is possible to predict the bud rot incidence well in advance.
Co-Authors A. R. Rasmi K. K. N. Nambiar KKN NAMBIAR