Abstract
Abstract Tomatoes spaced at 18 inches were transplanted on 7 Aug in 3-row plots 24 ft long on 3 raised soil beds (6-ft centers) which were fumigated with 13.5 gal/acre Vorlex and covered with plastic mulch. The experimental design was completely randomized with 5 insecticide treatments and a control replicated 4 times. Manzate 200 (1.5 lb/acre) and Tri-Basic Copper (3 lb/acre) were applied weekly, and Javelin SC at 1.2 qt/acre was applied twice to control Spodoptera spp. Insecticide applications began 13 Oct and continued weekly for 6 wk using a tractor mounted boom sprayer delivering 150-200 lb/inch2 to 4 drop lines with a maximum of 24 T-jet hollow cone nozzles fitted with brass TLX-3 80° tips and 100 mesh stainless steel strainers with check valves. An adjuvant (Induce at 1 pt/100 gal) was applied as an adjuvant with all treatments including the control. Whitefly immatures were counted on the terminal leaflet of the 6th, 7th and 8th leaf from the top on 9 randomly selected plants/plot. Plants affected by geminivirus were marked as symptoms appeared. All fruit of commercial size were harvested on 21 Nov and 4 Dec, graded for quality and size and weighed. Fruit were held for 4 d in ethylene (5 ppm), and sorted according to degree of ripeness. Fruit that were still between 10% and 50% green were considered "irregular" in ripeness. Yield values was assessed according to 8 Dec 1989 prices irrespective of irregular ripening.
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