“…1971). The complex nature of mango malformation is evident from the diversity of claims about its possible causes: fungi (Bhatnagar and Beniwal, 1977;Summanwar et al, 1966), mites (Narsimhan, 1954;Summanwar and Raychaudhuri, 1968;Yadav, 1972), viruses (Sattar, 1946) and physiological factors (Kumar et al, 1980;Mishra and Dhillon, 1980;Pandey et al, 1974;Singh, 1986;Singh and Dhillon, 1986 a;Singh and Dhillon, 1989a). The presence of malformin-like substance(s) in malformed tissues of mango has also been observed (Ram and Bist, 1984;Singh andDhillon, 1987, 1989b).…”