The Bulletin. 27 



In North Carolina, many growers have observed and spoken of the 

 good work done by wasps in destroying cabbage worms, and there are 

 several other predaceous insects that feed on them. One may also fre- 

 quently find cabbage worms which are sluggish, dying or dead from 

 fungous or bacterial disease. Sometimes dead worms may be found in 

 which the whole body has become softened -by internal decay. One such 

 dead worm may infect many others near it. All these enemies of the 

 Avorms that help to hold them in check are worth knowing about. In 

 some years their work is very efficient, and in all years they keep the 

 worms from being as destructive as they would otherwise be. 



REMEDIES. 



(See what is said about ''Using jjoisons on cabbage," beginning on 

 page 37). 



Paris Green. — In the Avriter's rather limited experience, he has found 

 Paris green to be an excellent remedy for cabbage worms, and he has used 

 it freely in his own garden and eaten the cabbage afterwards, with 

 no harmful results whatever. The method used was to mix one ounce 

 of dry paris green with one pound of dry, air-slaked lime. The two are 

 stirred together until the whole mass is one even uniform shade of color, 

 with no spots or streaks of green. This is then tied into a thin cloth 

 sack, and by shaking over the heads enough of the mixture sifts 

 through the thin cloth and settles on the leaves to furnish adequate pro- 

 tection. It is only necessary to use just enough to give a light dusty 

 coating over the leaves. It may be applied at any time in the day, 

 either when the plants are wet with dew or not, but the writer has 

 usually applied it in the afternoon when the plants were dry. Wind 

 and rain will remove the application in from one to three weeks, so that 

 several treatments are needed. It should be used soon after the plants 

 are first set out and repeated as often as occasion requires, until the 

 heads are half formed, or a little later if needed. But it is well not to 

 apply the material within three weeks of the time the heads are to be 

 cut. 



In October, 1908, we made a practical test of this remedy in a large 

 patch of collards at Raleigh. Mr. Z. P. Mr^calf, Assistant Entomologist, 

 carried out the test under instructions of the writer. In treating 460 

 collard plants only one and one-fourth pounds were used (this contained 

 only one and one-fourth ounces of paris green). Within two days there 

 w^ere noticeably less worms on the treated plants than on untreated 

 ones, and there were many dead worms on the ground. At the same 

 time a lot of worms were placed on treated plants and watched in the 

 laboratory, and all died within a few days. 



In August, 1908, the writer advocated the use of this remedy at the 

 Farmers' Institute, at Brevard, Transylvania County, and in September 

 received a letter from Mr. John S. Boggs, R. F. D. No. 2, Brevard, 

 saying : "I have been using your Paris green and lime mixture on my 

 cabbage, and it does the worlc." 



All of our experience has been Avith dry applications, and these are 

 so simple, inexpensive and easy to make that it leaves little to be desired. 



