MINISTRY OF AGRICULTURE, EGYPT. 



Bulletin i\o. l'. 



(ENTOMOLCH.K iAL -<K( :TH>N I. 



MAC1IINKS KOI! TIIK TREATMENT OF CO'ITOX SEED 

 AGAINST 1MNK I'.OU, WORM 



vr/m/ ifo.^tf/iifUn S\rxi>.). 



It is now a. matter of general knowledge that the pink boll worm 

 passes through the winter in a rendition, either in the, dead 



bolls Ml on the cotton slicks and the ground alter t Ir- previous, year's 

 harvesl. or in the cotton seed. As regards the former, for the last 

 three years the Mimstrv of Agriculture has endeavoured by its boll 

 \vonn campaign to induce cultivators to collect and burn the dead 

 bolls in order to reduce the menace to the next year's crop. The 

 present paper deals only with the question of the cotton seed which 

 has occupied the attention of the Entomological Section since 1!U'J. 

 Siii< e the completion of the laboratory stage, of the experiments 

 progress has been slow, partly owing to the general attituti' >thy 



and. in som> even of opposition on the part, ol gi niters and others 



concerned, and partly owing t-> the dilliciilt ies of various kinds 

 occasioned bv the war. Ho\vevei-, a law has now been passed making 

 the treatment, of cotton seed against pink boll worm compulsory, 

 and it has therefore, been thought advisable to publish a brief rt-sinin'- 

 of what has be-n done. gi\ ing short accounts of the various types of 

 machines t hat have, been proposed. 



In December l!)i:i. when the pink boll worm was just beginning 

 to be regarded a 'rlv exhaust i\v .f laboratory 



experiments Was cari'ied out to test the various methods of killing 

 the worms without damaging the seed. The results of these experi- 

 irients weiv jtublished in tlu> " Agricultural Journal of Egypt." 1913, 



