Search Results
Abstract
Alkvlnaphthalenes are used as solvents for chlorinated insecticides and herbicides. Johnson, Veomans, and Smith (2) reported that these solvents could cause the death of the apical meristems of chrysanthemums when applied in concentrated solutions or in mechanically or thermallv generated aerosols. Controlling the number of flowers and fruits on a stem is not only of academic interest but of practical importance. Thev are now controlled on chrysanthemums by removing the excess by hand. Research reported in this paper show that HAN,R a petroleum fraction containing a large percentage of alkvlnaphthalenes. can be used to control the number of flowers borne by chrysanthemum plants.
Abstract
Growing Acer rubrum L. plants under an integrated system of supplemental lights for 4-hours (2200-0200) at 10 ft-c., aluminum reflective soil mulch, and disulfoton soil insecticide treatments, produced nursery liners in 1 season that were equal to 2- or 3-year-old seedlings grown by conventional methods. Increased available light in response to the reflective radiation from the A1 soil mulch was the most significant single factor. Added growth effects were obtained by combining chemical soil treatments under aluminum mulch along with the supplemental lighting. Amber lights and incandescent lights were equally stimulative. Potato leafhoppers (Empoasca fabae (Harris)), which commonly stunt tip growth of many deciduous nursery liners, were repelled by the aluminum mulch and killed by the disulfoton insecticide.