314 REPORT OF THE COMMISSIONER OP AGRICULTURE. 



As will be seen from esammiiig this table, a rain began falling before we hr.d fin- 

 isbed applying the poisons. This r.iin continued to fall all night, all of the next day, 

 and part of the succeeding night. Another heavy rain occurred the next night. Ou 

 the 26th I found that the cotton of sections 1 and o was scorched considerably, far 

 more than either 2 or 4. The second section had killed the most worms. I could not 

 gee but what section 3 adhered as well as either 1 or 2, and all were far better than 4. 



August 26 four additional sections were poisoned ; the only variation from Royall's 

 mixture being in omitting some ingredient, substituting gypsum, bulk for bulk, for 

 flour, or varying the quantity of poison. 



^Vhen these poisons were applied in the afternoon the sun was shining brightly. 

 The mixture with plaster was scattered more easily than those with flour, and dis- 

 tributed itself very evenly over the leaves. On the 3l8t of August a few drizzling 

 showers fell, and there were more on the next day, scarcely any falling during the 

 succeeding night, and a very little the following morning. August 2d, after two clear 

 days and dewey nights, I found all of these poisons adhering well ; though the flour, 

 by forming a sort of paste, had collected into blotches, while the plaster remained as 

 evenly distributed over the leaf as ever. Ou the 2d of September I noted that the 

 cotton of section 5 was somewhat scorched. Section 6 was scorched very little. Though 

 section 7 was in great part removed, it had scorched the cotton considerably ; more 

 than either of the other sections. Very few leaves were injured on section 8. This 

 same day I found that a very little of section 1 still adhered, and the cotton was little 

 injured. A little was also found on sectou 2, whore the cotton was very little hurt. Sec- 

 tion 3 seemed to adhere as well as the precedLug, but had scorched the cotton more. 

 Section 4 had scorched the cotton little, but no traces of the poison were left. 



September 2, two other sections were poisoned, using one part of flour by weight to 

 two i)arts or gypsum in place of an equal bulk of flour in Royall's patent. 



*By a mistalie the quantities of rosin, dextrine, and Paris green were intended for twice the hulk of 

 flour and plaster used. 



At the time these poisons were applied this cotton wasbeginniug to be honeycombed 

 by the caterpillar.s ; but none large enough to eat through the leaves were to be found 

 on the adjoining sections 5, C, 7, and 8. Between 8 audi) a small section was left un- 

 poisoned, and this was defoliated within the next five days, while all of these sections 

 retained their foliage up to the time when I left the field', September 15. 



September 4, 1 noted that the cotton on section 10 was badly scorched, though the 



