ESTUDOS SOBRE A BIOLOGIA ELORAL DA MANGlEERA INDICA L. 
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buted to athmospheric agents. On examination, however the fallen fruits, 
which one observes not only after heavy rain or wind, look amputa- 
ted at the insertion point of the peduncle. Keeping these fruits under 
observation I found that they showed black spots gradually enlarging 
to total desintegration. 
I did not actually determine Colletotriehum gloeoporioides, Penz, 
to which the nature of the lesions may point, on Mangifera indica in 
Rio not having the necessary litterature and other xneans of de- 
termination on hand. Mycelia were found in many anthers and some 
cuts of penduncules. Several differents kinds of spores were present on 
the flowers and lead me to believe that there are also other kinds of 
fungi living on Mangifera, tho they may not all be as pernicious as 
Colletotriehum gleosporoides and may even be comparatively harmless. 
The damp climate of Rio certainly favours the growth of fungi and 
can not be recommended for the cultivation of the mango, since the de- 
veloppment of fungi is certainly an important factor in the loss of 
fruit. 1 
Of other parasites and pests I can so far mention only thrips, scales, 
and small spiders, the webs of which were found. 
Trees coming from the same spot and subjected to very similar or 
equal conditions do not present the same characteristics and neighbou- 
ring trees may differ greatly. 
The variations of the flowers are, as far, as I can make out, not 
characteristic of definite varieties either, but are found in many of these. 
The question of brazilian varieties, as some other questions broached 
and which we continue studying, still need to be gone into at greater len- 
gth before definite conclusions may be reached. 
