By D. K. Chakrabarti
Malformation ailment of mango (Mangifera indica) before everything famous in patches in India has now became a world threat at any place mango is grown. The problem posed by means of the matter attracted curiosity of Scientists from a number of disciplines, proceed to take action, and may allure their realization till the matter is known threadbare, and resolved. for a very long time, because of advanced nature of the disorder, the reason and causal agent used to be either hotly debated. simply in recent times, the difficulty of the etiology of the sickness has been resolved, epidemiology has been labored out to a wide quantity and silver bullet keep an eye on measures were changed by means of IPM procedure in response to the knowledge generated at the body structure of pathogenesis and epidemiology of the ailment. The monograph strains the process learn on mango malformation due to the fact its first report back to date, analyzes the controversies that it evoked and documents the present prestige of other elements of the matter. It additionally offers software program on professional process for forecasting and administration of the sickness. hence, it's a saga of the final century’s so much arguable and damaging plant ailment of foreign value. the writer, Dr Dilip Kumar Chakrabarti, labored in this challenge for his Ph. D programme and endured to pursue the matter in the course of his tenure of over 25 years on the Narendra Dev collage of Agriculture & expertise, at Kumargunj, Uttar Pradesh in India, positioned in a space the place mango is grown generally, living on all points of the matter and has now constructed a software program package deal that is helping vastly in realizing and handling the matter to tolerable limits.
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Extra resources for Mango Malformation
In a separate investigation the number of vegetative malformed shoots before flower bud initiation was successfully used to predict the incidence of floral malformation in the forthcoming crop season (Chakrabarti etÂ€al. 2003). Finally, a computerized expert system has been developed to predict the disease incidence in any State of India and to suggest appropriate IPM strategy (Chakrabarti and Chakraborty 2007). Varietal Screeningâ•‡ From the very beginning, a number of reports published included the performance of various cultivars of mango against the malformation under natural conditions.
Var. Rajapuri (Chauhan and Rao 2000). e. bud stage, middle stage of bud growth and at full bloom stage. Similarly, higher mangiferin content was recorded in malformation resistant mango cultivars than the susceptible ones (Singh 2006). The host plant produces mangiferin primarily to face challenges from abiotic and biotic stress like injury or invasion by parasitic microorganisms (Kishore and Syamal 2006). But excessive accumulation of mangiferin at the site of infection brings about a wide range of biochemical and physiological aberrations in the host cells which ultimately manifested the disease symptoms (Chakrabarti etÂ€al.
Interaction of mangiferin with the pathogen and its mite vector—Population of F. moniliforme and Tyrolichus. casei are negatively correlated with mangiferin content (Chakrabarti etÂ€al. 1997). At the initial stage of disease development, a positive correlation is noticed. But with further increase in mangiferin content, the population of the pathogen declines. Mangiferin stimulates fungal growth at low concentration but becomes inhibitory at higher doses (Ghosal etÂ€al. 1977). The increase in the rate of symptom production is not affected till the Fusarium population drops down below the threshold level.