Dr. L. H. Gotjgh.] 



Table XVIT. Calculation of Damage due to Gelechia Attack. 



[Bull. Ent. Research. Vol. 9, Pt. i. 





Total quantity 

 examined. 



Average weight of 



1,000 seeds without 



lint in grammes. 



Calculated as from 100 bolls. 



Seed cotton. 



Amount lost per 100 average 

 bolls, lint and seed combined. 



Total 



of the 



four 



previous 



columns 



Intensity of Attack. 



Percentage Loss. 



Date 

 1917. 



Total 



number 



of 



bolls. 



Number 



of 

 sound 

 bolls. 



Total number of 

 seeds found. 



NU Te b e e d r s°f f ound ag6d ' Correoted ™g ht 



Actual weight 



of seed cotton of 



100 sound bolls 



in grammes. 



Owing to 

 reduction in 

 average seed 



weight. 



Owing to 



destruction of 



seed 



substance. 



Owing to 



disappearance 



of 



seeds. 



Per cent. 



bolls 

 attacked. 



Per cent. 



seed 

 attacked. 



In weight of 



unselected bolls as 



compared with 



sound bolls. 



Due to the 

 reduced weight 

 of 

 sound seeds. 



Due to the 



destruction of 



seed 



substance. 



Due to the 



disappearance 



of seeds. 



Total of 



the 

 last throe 

 columns. 



From 

 sound bolls. 



From 

 all bolls. 





of seed cotton of 





In sound bolls. 



In all bolls. 



In sound bolls. 



In all bolls. 



100 sound bolls 

 in grammes. 



August 



14-23 



25-30 

 September 

 1- 6 

 8-13 

 First picki 



15-20 



22-27 

 October 



29- 4 



6-11 



13-16 

 Second pic 



107 

 443 



643 



907 



ng took 



724 



1,212 



1,703 



2,281 



1,707 



nng too 



60 

 180 



153 



319 



place. 



75 



186 



281 

 325 



288 

 t place. 



126-3 

 121-7 



121-3 

 110-8 



112-3 

 106-3 



101-0 



103-1 



97-6 



126-0 

 119-4 



113-8 

 103-0 



107-2 

 101-3 



94-6 

 95-2 

 92-2 



1,650 

 1,654 



1,622 

 1,585 



1,644 

 1,607 



1,510 

 1,491 

 1,518 



1,558 

 1,583 



1,534 

 1,512 



1,537 

 1,467 



1,437 

 1,400 

 1.432 



27 

 11 



23 

 43 



28 

 17 



20 

 20 

 33 



202 

 176 



221 

 197 



420 

 312 



235 

 330 

 318 



308-4 

 301-0 



296-6 

 266-6 



277-3 

 260-0 



231-8 

 233-9 

 2260 



271-6 

 268-7 



248-5 

 224-0 



222-9 

 210-1 



193-9 

 185-9 

 186-8 



0-8 

 4-8 



14-8 

 15-4 



8-4 

 8-4 



11-6 



12-6 

 9-0 



18-1 

 14-1 



17-0 

 15-6 



290 

 19-3 



14-4 

 18-6 

 16-4 



17-4 

 13-0 



16-0 

 12-1 



18-0 

 22-3 



111 



14-2 

 12-6 



307-9 

 300-6 



296-3 

 266-1 



278-3 

 260-1 



231-0 

 231-3 

 224-8 



44 

 69 



76 

 65 



90 

 85 



84 

 86 

 83 



13 

 11 



14 

 13 



27 

 21 



16 

 24 

 22 



11-9 



10-7 



16-2 

 16-0 



19-6 

 18-8 



17-7 

 20-5 

 17-3 



0-3 

 1-6 



5-0 

 5-8 



3-0 

 3-2 



5-4 

 5-4 

 4-0 



6-9 

 4-7 



5-7 

 5-9 



10-4 



7-4 



6-7 

 8-0 

 7-3 



5-0 

 4-3 



6-4 

 4-3 



fi-5 

 8-6 



5-2 



6-1 

 5-6 



11-8 



10-6 



161 

 160 



19-9 

 19-2 



17-3 

 19-5 

 16-9 















































