REPORTS OF DR. E. H. ANDERSON. 
[45] 
inches to 3 feet in height and growing luxuriantly, the preceding month having 
been of high temperature and seasonable, and consequently favorable to the grow th 
and cultivation of the plant. I found Aphis abundant in spots, but not generally so. 
Ants in usual numbers, and chiefly among colonies of Aphis. Found a few forms cast 
from shedding, but no evidence of either Aletia or Heliothis. On the 8th a chrysalis, 
wrapped up in a leaf, was found. Between this and loth, Heliothis was found at 
woi k in the young forms and bolls, so few, however, as to require diligent search to 
And it. It was less observable on corn than usual up to this time. The grass worm, 
throughout the month, was abundant in grassy fields, both upon grass and young 
cotton and corn, destroying all in many instances, and not confined to bottom, but 
appearing on hillsides as well. No other development of interest until the 24th, 
when a full-grown Aletia larva was brought in from the field, which passed iuto 
chrysalis and emerged August 4. 
Through correspondence learned that larva? three and four days old were discov- 
er! d near Canton, same date; other larva? seen here about same time. Heliothis also 
seen llyiug about. Noticed Aphis upon okra contiguous to cotton in same numbers as 
on cotton ; also circular perforations, apparently the work of a cotton-leaf worm. 
Have looked can-fully after plants of Malva family during spring and summer, but 
so far have seen no trace of Aletia. 
A notable t*a< t lias l>. en tin- Midden disappearance of the Cms* Worm after a heavy 
rain. I have often noticed that Aletia does not appear in considerable numbers dur- 
ing a spell of wet weather, whether stormy or not, and believe that such heavy rains 
as we have had recently, by lowering the temperature and washiug them off, would 
retard their progress. 
The mean temperature has been 10° Fahr. less than that of June. Facts so far 
would seem to indicate that Aletia had struggled through in some form from its de- 
parture last fall until its advent this summer. 
Continued my visits to different fields of cotton to watch progress of both Aletia 
and Heliothis. Found very few, though every field has had its quota. Atmospheric 
conditions have not been fa\orable, or el.se the third brood would he easih diseovi r- 
able, if not damaging. The mean temperature has been much lower than usual, 
rangiug from 70° to eti£ Fahr. Have had frequent showers throughout the month, suc- 
ceeded by co<d spells, northwest and north winds prevailing, and hard rains on 'J3d, 
S 1th, and 85th, lowering temperature. 
Heliothis has been at work, but to a less extent than usual. Noticed its absence in 
early corn, and, in fact, could find no sign of it in the first planting, though the Grass 
Worm was much more abundant than usual. In the corn planted in May it (Helio- 
this) is now out in full force; in fact, in a small field of my own, planted in May and 
now in milk stage, it may be found in every ear, and has done considerable damage. 
On the loth, while walking at dusk along a field of cow-peas, where I had gathered 
a crop of early corn, I noticed numbers of a small, gray moth in the grass and a like 
number of Heliothis about the peas. I have repeated my visits since, and from the 
numbers of moths and larvje found there have come to the conclusion that it relishes 
that food as well as corn or cotton ; and it has suggested to me that by planting an 
early crop of corn and a crop of peas in the corn, so timing the planting that the peas 
shall be in bloom about the time the corn hardens, and planting a later crop of corn 
and peas, so as to furnish food for the season, Heliothis would be kept out of the cot- 
ton. Suggestions as to corn have been made by others (see pages 312, 313, Reporl Ofl 
Cotton Insects, 1879), but inasmuch as the pea crop continues to bloom and make fruit 
so much longer than corn it would furnish food for the whole season. 
I shall watch my crops of peas in reference to Heliothis, and will report to you the 
results 
Received the pyrethruni the 22d, and made my preparations by adding 1 ounce 
pyrethrum to 10 of flour and 1 to 30 of hot water. I used hot water to make a decoc- 
tion, as recommended by Professor nilgard, and to prevent fungus, as referred to by 
Mr. Schwarz, when made with cold water, thinking the heat would destroy the fun- 
gus germ. Will try it likewise with cold water. 
Tried the dry preparation on grown and young Boll Worms on the 24th. The pow- 
der was apparently slow in having any effect, though it seemed to stupefy the older 
worms, while putting the younger in a torpid condition. I allowed them to remain 
twenty-four hours, sprinkling the powder heavily upon them and the leaves, iticlosed 
in a small bottle, when, on examination, I found the small ones dead and the larger 
active. The infusion soon put the larger ones to writhing, the smaller remaining 
torpid and quiet. In an hour the larger and intermediate size commenced crawling, 
when I reapplied the solution and they again became torpid after writhing a few 
moments, and died in thirty-six hours. On the 25th brought in a fresh supply of 
worms, and after adding $ an ounce of pyrethrum to each preparation, applied the 
dry to a lot of Boll Worms of various sizes, all of which were soon under its influ- 
ence, writhing and becoming torpid, the smaller soon killed outright, the larger and 
full grown succumbing in from two to three hours. The result with the solution was 
