decline, but undoubtedly were a major cause of the 1988 decline. (See Table
3.) Using the May 11 count for treatment comparison, all treatments gave sig-
nificant control. Orthene at 2.259 lbs. AI/A. was numerically superior to all
other treatments. However, owing to the unusual decline in budworm popula-
tions, accurate comparison of differences between treatments was impossible.
The lack of heavy budworm infestations contributed to larger yields of cured
tobacco than in 1987. (See Table 6.)

 The hornworm population began to increase on the tobacco on May 25, which
was about three weeks later than in 1987. No doubt that the drought weather
conditions adversely affected hornworm pupal eclosion, which was responsible
for the lateness of infestations. Population levels on the untreated tobacco
checks never reached as large a level as in 1987 at any time during the
growing season. (See Table 4.) On June 8, all treatments gave significant
control, with both dosages of Capture being numerically superior to the other
treatments. Some yield and dollar return loss was probably caused by the
hornworm particularly in the untreated check tobacco. (See Table 6.)

 Only Lannate at both dosages caused any detectable phytotoxicity. The
injury was evident following the first spray application. Chlorosis of the
lamina was present in the middle and top of the plants and persisted until
June 22. As the leaves matured during the latter part of the growing season
and were removed by harvesting, the phytotoxicity disappeared. (See Table 5.)
The phytotoxicity had no apparent adverse effect on yield or dollar return.
(See Table 6.)

 Redlegged grasshopper, Melanoplus femurrubrum (DeGeer), infested the
tobacco in large numbers, and caused considerable feeding damage. On June 8,
all treatments except Lannate at 0.701 lb. AI/A. gave significant control of
the grasshopper. Capture at 0.113 and Orthene at 2.259 lbs. AI/A. were numer-
ically superior to the other treatments. The grasshopper had no significant
effect on yield or dollar return. (See Table 6.)

 Yield in the untreated tobacco checks was 616 lbs./A. (27.3%) larger than
in 1987, which was probably due to the smaller than usual budworm and hornworm
populations. Dollar return in the untreated tobacco checks increased $798
(26.7%) as compared to that in 1987 indicating that insects were not signifi-
cantly detrimental to the crop in 1988. The best yield from treated tobacco
was 484 lbs./A. (15.2%) larger than in 1987, and best dollar return was $797
(18.7%) larger. The increase in dollar return was primarily due to the
increased yield, since the return per pound averaged $0.06 less in 1988 ($1.38
versus $1.32). (See Table 6.)

 F-7869 was tested in the field for the first time, and compares favorably
with Capture and Orthene for control of the budworm, hornworm, and redlegged
grasshopper. However, the compound did not give effective control of the
aphid, which is a disadvantage when compared to both Capture and Orthene.