530 rRdCEEDINGS OF THE THIRD EXTOMOtOGICAL MEETING 



became compact. They were also found on other leaves as well, such 

 leaves either curling over at the sides or crumpling badly. As the 

 plants were not to be treated so as not to disturb the normal 

 conditions prevailing in the culXivators' field, the pest got well 

 established and damaged the crop to a great extent, so much so, 

 that even the bolls became affected, shrivelled up and fell down. 

 The mite in conjunction with the three mealy-bugs referred to above 

 and Machcerota planitice, vitiated some of our experiments a good deal. 

 As spraying either with soap and flowers of sulphur or resin fish-oil 

 soap an^ sulphur was out of the question, the worst affected plants 

 were pulled out and burned. But this was a very drastic measure, 

 as with its wide and frequent application very few plants were 

 left in the experimental plots to continue the experiments against 

 the Bollworms. This year we have tried the fumigation of cotton 

 seed with CSj prior to sowing and there appears to be less whitish 

 mould or cotton Eriophyes on the plan s. But it is still to be seen 

 later on whether they remain such till the end of the season. The 

 mite has been reported from Bombay as well as Hansi in the Punjab. 

 The disease has also been reported from : — 



Surat 1908, 1909, February 1909, October 1906. 



Kirkce ..... January 1909. 



Nadiacl December 1907. 



Baroda . • . . . . March 1907. 



Sibp.ir ... . . . July 1905. 



Cuttack November 1906. 



Pusa 1912, 1915. 



In Surat the disease is known as Chhasio or Chasiu and Badi Eog 

 in Dharwar on account of the ash-like appearance of the curled leaves. 

 In occasional years it has been reported to cause as much as 50 per cent, 

 damage. {Annual Report. Surat Farm, 1908-1909). The Superin- 

 tendent of the Surat Farm reported that the disease was especially bad 

 during 1906. Specimens of mites on cotton leaves from Surat were 

 sent to Mr. Nathan Banks and he reported "... .the mites agree with 

 my Eriophyes gossypii from the West Indies. The leaves do not 

 seem to be as badly affected as those I had from the West Indies-" 



As an adjunct to fumigation we have also tried on a small scale 

 treating the seed with corrosive sublimate solution 1 in 1000 {Tropical 

 AgricvUmist, Vol. XXXIII, September 1909, p. 209) and find that 

 the effect has been good. 



The Black Scale, Saissetia nigra, has also been bad occasionally. 

 Certain varieties of cotton appeared to be more afiected than the others. 

 It was bad in patches in the beginning—especially during 1912 and 1914 



