No. 1. ] 



Mined la n eons No lex . 



13 



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In April 1891 the Director of the Forest School, Dehra Dun 

 Mango Psylla. forwarded blighted shoots of mango [Mangi- 



fera indica), with the information that the 

 whole of the mango trees in a large garden near Dehra. were attacked 



though, strangely 

 enough, other trees 

 close by had not suf. 

 fered. The blighted 

 shoots were aborted, 

 so as to appear almost 

 like a series of little 

 green rosebuds upon 

 the twigs. These 

 false buds were found 

 to contain mature 

 Psyllldm [i.e., minute 

 fly-like K-hynchota 

 allied to the Aphida?), 

 I The insect has not 

 1 previously been de- 

 scribed from India, so 

 it has been sent to Mr G. B. Buckton in England for determination. It 



is no doubt allied to the Vsylla 

 bnori, described in the yem 



1737 by Reaumur, as aborting 

 the leaves of the box tree 

 much in the way that this insect 

 aborts the mango shoots 

 {Reaumur Mem., p.. 3 51, pi. '29). 

 With regard to remedies for the 

 pest, any of the kerosine washes 

 which are coming into use in 

 the United States and Europe 

 for destroying plant lice on 

 fruit trees would no doubt 

 also kill this insect, if it could 

 be got at, but the insect is so 

 much protected inside the 

 aborted bud-like shoots that 

 there seems little chance of reaching it with an insecticide. Insecticides 

 might perhaps be useful for spraying the trees when the parent insects 

 are engaged inlaying their eggs, but it has still to be ascertained at 

 what time of the year this takes place — whether in the spring or autumn. 

 Clearing up rubbish around the mango trees, where the insects arc likely 



