Influence of climate on yield of cocoa over Vellanikkara, Thrissur, Kerala

N. Manikandan
G.S.L.H.V. Prasada Rao
S. Parasannakumari amma


A study was undertaken to study the effect of weather parameters on yield cocoa over Vellanikkara, Thrissur, Kerala. The monthly cocoa yield of the Cadbury – KAU Co-operative Research Project farm were collected for 100 trees from 1991-2007. The weather data for the above period was also collected and pooled according to the cocoa yield data. The mean peak harvest was noticed during May (6.2 pods/tree), followed by March (5.2 pods/tree) while less in February (2.7 pods/tree). The coefficient of variation was very high (48.7 – 124.5 %) in monthly pod yield of cocoa while it was less (23.2 %) in the case of annual yield of cocoa. The mean seasonal pod yield was more during the summer (5.0 pods/tree), followed by Northeast monsoon season (4.1 pods/tree). The results indicated that there was an inverse trend between the annual rainfall and cocoa yield. Wherever the annual rainfall was very high, the annual cocoa yield was low. In the case of temperature, the maximum temperature from January to March had a profound negative influence on annual cocoa yield. From the above it can be inferred that high maximum temperature from January to middle of March together with high rainfall during the rainy season appeared to be detrimental for obtaining better yield in cocoa.

How to Cite
N. Manikandan, G.S.L.H.V. Prasada Rao, & S. Parasannakumari amma. (2014). Influence of climate on yield of cocoa over Vellanikkara, Thrissur, Kerala. Journal of Innovative Agriculture, 1(1), 31-36.


  1. Alvim, P. de T. 1981. Recent studies on environmental physiology of cocoa. In: Proc. 7th International cocoa res. Conf., Lagos, Nigeria. 85-89pp.
  2. ICCO. 2012. The world cocoa economy: Past and present. 146th meeting, London.
  3. ICCO. 2014. Quarterly bulletin of cocoa statistics, Vol XL (2).
  4. Murray, D.B. and Spurlin, A.T. 1964. Effect of temperature on growth. Ann. Rep. Cocoa Res. Trinidad. 42-47pp.
  5. Prameela, K.P. 1997. Effect of weather on cocoa and improvement of bean size through seasonal crop orientation. M.Sc.(Ag.) Thesis, Kerala Agricultural University, Thrissur. 119p.

Most read articles by the same author(s)