Mango is cultivated in the northeastern parts of Tamilnadu is in large scale, but due to surplus production during normal season (may-august), there is no reasonable profit for the mango cultivars. Upon adoption of new techniques such as the offseason bearing (oct-jan), farmers can maximise the profit. Off-season was first adopted in Thailand in 1986. In kanyakumari and mostly in nagarkoil, naturally off season is practised without the application of growth retardants. The optimum temperature required for off season is 29.9 – 32.9c and the moisture level is 76.6% and the sun shine hour is 437.05hours.
Varieties like neelam, bangalora, alpasand, Calcutta, sendhura, imampasand, vr32, ratna, rumani, kelepad, aishwary are more desirable on the offseason bearing. The ambient temperature and distributed rainfall, orchard management , experience of mango growers could be the factor behind the offseason production.
WAYS AND MEANS OF MAKING OFF-SEASON BEARING
The most common practices followed in the off-season bearing in mango is application of PACLOBUTRAZOL – a Plant growth retardant. It is used in combination with the thiourea for producing as well as breaking flowerbuds in mango. Therefore effective method of application of the plant growth retardant is drenching in the soil as compared to the foliar spray. Paclobutrazol is applied at the dosage of 6g/tree (based on the canopy size). At 120 day after the application of paclobutrazol , 0.5% of THIOUREA is sprayed to the tree for bud breaking. The inflorescence emerge after 2.5 – 4 months of application of paclobutrazol.
Another method is application of ethephon @ higher concentration of 1000ppm. This will induce early flowering & potassium nitrate (kno3) at 1 – 10% would increase the number of panicles in the tropical and subtropical region.
BENEFITS OF OFF-SEASON BEARING
It can maximize profit, provide a continuous supply of mangoes, helps the processing industries work throughout the year, and can increase Employability & exports.
EFFECTS OF OFF-SEASON BEARING
It is expensive and requires skilled labour for application of plant growth retardants. Off season bearing leads to death of plant within one year, if grown in rainfed condition. Residual effect due to over usage of pesticide. Pest control is an issue with residual effect of pesticides due to over-usage is also not desirable.
Most of the farmers are not aware of Off season bearing in mango. First of all, mango growers should be made aware of the techniques and methods at their disposal so as to maximize the yield and profit. Finally by following off season bearing, farmers can get income through out the year and improve their standard of living.
Aravindasamy. S is a final year student of B.Sc(Agriculture) in Imayam Institute of Agriculture and technology (IIAT). He is interested in commercial farming and he likes to read books.
Assistant Professor(Agriculture Extension),
Imayam Institute of Agriculture and Technology, Kannanur, Thuraiyur, Trichy (dt).
Srinivasan, C. and K.G. Shanmugavelu. 1971. Proximate composition of certain off- season mango varieties of Tamil Nadu. South Indian Hort., 19: 24-28.
Pal, R. N., Chadha, K. L., & Rao, M. R. K. (1979). Effect of different plant growth regulators and other chemicals on flowering behavior of mango. Paper presented at Mango Workers Meeting held at Panji, Goa, May 2-5, 1979.
Adam, C. S. (1986). Off-season flowering response of mango cultivars to potassium nitrate. Acta Horticulturae, 175, 277 280.
https://www.google.co.in/url?q=http://www.agritech.tnau.ac.in/pdf/2013/cpg_horti_2013.pdf&sa=U&ved=2ahUKEwiSsdCr_feAhXSF3IKHTQxAJ0QFjAOegQIBBAB&usg=AOvVaw3r1YrNVrQ7HsFrbYd4592t. page no:8
Sundararaj, J.S., Muthuswamy, S. and Raghavan, N. (1972). OFF-SEASON CROPPING OF MANGO. Acta Hortic. 24, 191-193