The Tobacco Biidworm. 



CONTROL MEASURES. 



POISON APPLICATIONS. 



It is evident from the habits of the biidworm that the most feasible 

 means of direct control are applications of some insecticide in the 

 bud. Experience has shown that at least two applications a Aveek 

 are necessary in or- 

 der fully to protect 

 the bud, because the 

 poison is scattered by 

 the expansion of the 

 rapidly developing 

 leaves. The first two 

 or three applications 

 are made by the stick- 

 and-cup method (Fig. 

 3). A quart cup with 

 nail holes in the bot- 

 tom is fastened to a 

 stick and the poison 

 mixture is sifted 

 upon each plant as 

 the operator walks 

 slowly along the row. 

 As the plants increase 

 in size the leaves of 

 tlie bud are more 

 tightly folded and it 

 becomes necessary to 

 change the method 

 of application by 

 opening the bud with 

 one hand and at the 

 same time dropping 

 a small portion of the 

 poison mixture into 

 the bud w^ith the 

 other hand. The 

 poison is carried in 

 a sack fastened around 

 page.) 



OBJECTIONS TO THE USE OF PARIS GREEN. 



The insecticide in u.se in Florida at the time experiments by the 

 Bureau of Entomology were begun was a mixture of 1 pound of 

 Paris green to 150 pounds of corn meal. About 12 to 14 pounds 

 per acre of this mixture is necessary for each application. The 

 applications must be continued from the time tobacco is set until 

 it is topped. 



Shade-grown tobacco is very tender and very susceptible to in- 

 jury from either a mechanical or a chemical source. In dry weather 

 Paris green causes very little damage, but in wet weather consider- 

 able injury may result from the comparatively excessive amounts 



Fig. 3. — Stick and cup nicthdd of applying poison mix- 

 ture in tlie tobacco bud in combating thp budworni early 

 in tlie season before the bud leaves have become folded. 



the waist. (See illustration on title 



