Book review on “Aeromycology over Kachai lemon plantation in eastern Himalayan region”

    31-Aug-2022
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BN Pande
Contd from previous issue
SECTION – V: In this book Prof. N.I. Singh and his co-authors focused their attention on the problems of SocioEconomic Upliftment of Growers by the Horticultural crop.
They also added in it the Limitations of Physico- Economic Upliftment of the Kachai lemon Farmers. As regard to the Socio-Economic Upliftment of the farmers, Prof. Singh and his co- workers made analysis of 95 Kachai lemon growers selling lemon in the Kachai village and provided the information like 501 villagers in 2011, on an average, a grower grows 187 plants with a range of 25 – 3000 per grower. Half of the growers grow 60 plants or more as shown in the median. The main output is 54 tins 20 liters capacity) with a range of 10-600 tins. Half of them produce 40 tons or more. The average yield per tree is 00.65tin approximately equal to 8 kg of fruit (using 12.5 kg / tin with a range of 0.01- 1.6. Half of the trees yield 0.64 tin more (approximately equal to 8kg of fruit). The correlation between yield/ tree in tins and number of trees is (-)0.44 i.e higher the number of trees low is the yield/ tree. It raises the classic size- productivity debate in agriculture. The negative association between size of a farm and productivity used to be a strong argument for breaking up large farms. Yield is high in small farms due to better care of plants. Yield / tree is much higher when the growers grow only a few trees. It is obvious that when a farmer grows many trees, it spreads over a large area which in turn due care cannot be given to the plants which are aging and becoming more vulnerable to diseases associated with climate change.
SUMMARY OF THE WORK CARRIED OUT IN THE AEROMYCOLOGYNOVER KACHAI LEMON PLANTATION:
• Phytoextracts of the ten medicinal plants showed different inhibitory effects on the growths of fungal pathogens of Kachai lemon.
• Phytoextract Curcuma longa showed highest antifungal activity against Fusarium sp. followed by Ageratum sp. and Zingiber sp. respectively.
• Phytoextract of Curcuma longa showed highest growth inhibition rate
• Against Penicillium digitatum the highest antifungal activity exhibited by Azadirachta indica, Zingiber sp. etc.
• The phytoextracts used in this experiment showed higher growth (%) at higher concentration rate.
• The highest antifungal rate against Penicillium digitatum was due to Azadirachta indica.
• The four chemicals were used for the management of fungal diseases of Kachai lemon and showed significant antifungal activity against the fungal pathogens.
• Carbendazim 50% W.P. exhibited the highest inhibitory effect against species of Fusarium 100% growth inhibition even at lower concentration (0.1%).
• The best result was shown by Carbendazim 50% for controlling Phytophthora parasitica, which exhibited 85.59% growth inhibition at its 0.1% concentration.
(To be contd)