Control. Cotton stainers may be controlled by spray- 

 ing, collecting and trapping, and much may be done by 

 removing outside sources of food, as far as possible, during 

 the season when no cotton is available for them. 



Spraying with any good contact insecticide by means of 

 a knapsack sprayer would be effective, but this is an expen- 

 sive method that will rarely be employed in the West Indies. 

 Collecting has proved chenp and effective. This operation is 

 carried out by means of tins containing water and kerosene, 

 into which the labourers jar or shake the young stainers. 



The insects may be attracted to bits of sugar-cane, 

 small heaps of cotton seed, seed of silk cotton and ripe 

 mangoes, where they may be killed while feeding by means 

 of hot water, kerosene or crushing. 



Any useless plants in the vicinity of cotton fields known 

 to harbour these insects should be destroyed, and great care 

 should be taken to prevent scattered seed from accumulating 

 around ginneries and store-houses. 



Fig. 42 Fiov^r-bud miggot. 

 The adult insect. About 25 times natural size. {Original,) 



