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1. Five glucocorticoids, when administered daily to rats for 5–7 days at a dosage of 5mg/kg, were in the following order of effectiveness with respect to their ability to decrease the weight gain of whole animals and the vastus lateralis, vastus medialis and gluteus medius muscles: corticosterone

A commercial preparation of Bacillus thuringiensis Berliner (Thuricidc®, 58–141, Lot D01801) was applied early in the season and evaluated for control of Pectinophora (Saunders) on cotton in 6×6×36-foot Held cages. The reduction in the population was judged by reduction in the number of rosettes and number of mines and the increased number of bolls. In the control, 80% of the bolls were infested compared with 40 and 10% in cages treated with 1 and 2 quarts of microbial insecticide per acre, respectively.

Integrated control against Heliothis spp. and other cotton pests was attempted in a large-scale field test in 1967 near Santa Rosa, Texas. The results obtained when resistant strains of cotton were planted and nuclear polyhedral virus (Viron/H® and Biotrol VTN®) was applied for control of the boll worm, Heliothis zea (Boddie), and the tobacco bud worm, H. virescens (F.), compared favorably with those obtained in adjacent fields treated with methyl parathion or with methyl parathion in combination with ethyl parathion.

Eggs (18-24 hours old) of the tobacco budworm. Heliothis virescens (F.), and the bollworm, H. zea (Boddie), were exposed to ultraviolet irradiation of a short (2537 A) or a long (3600 A) wavelength to determine the effect of these rays on egg hatch, subsequent development, and adult longevity. A gradual increase in time of exposure to the short-wave rays caused a gradual decrease in the percentage egg hatch, and no hatch occurred after an exposure of 20 minutes. However, the hatch was not greatly affected until exposures were longer than 1 minute. Eggs exposed to the long-wave rays had a comparable percentage hatch in all treatments. The treatments had no influence on time for larval and pupal development or on the longevity of adults emerging from embryos that survived the treatment.