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  • Author or Editor: C. L. Murdoch x
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Abstract

Rhodesgrass scale (Antonina graminis Maskell) is an important pest of turfgrass in many southern states of the U.S. Because of the positioning of the adults and the waxy coating of nymphal and adult stages, they are very difficult to control with insecticides. Excellent control of rhodesgrass scale in Sunturf bermudagrass (Cynodon magennissii Hurcombe) was obtained with Akton, diazinon, chlorpyrifos and leptophos. Ortho Dibrom Lawn Insect Spray was generally less effective than other materials.

Open Access

Abstract

Diclofop (2-(4-(2,4-dichlorophenoxy)phenoxy)propanoic acid) caused little to no injury to common bermudagrass [Cynodon dactylon (L.) Pers.] mowed twice weekly at 1.6-2.0 cm at rates of 0.56,1.12, 2.24, and 4.48 kg/ha or to ‘Tifdwarf’ bermadagrass Cyndon dactylon × C. transvaalensis Burtt-Davey, mowed daily at 0.5 cm at rates of 0.56, 1.12, and 2.24 kg/ha. Diclofop at 0.56, 1.12, and 2.24 kg/ha gave good control of mature goosegrass [Eleusine indica (L.) Gaertn.] in ‘TifdwarP turf mowed daily at 0.5 cm, but resulted in inadequate control at 4.48 kg/ha in common bermudagrass turf mowed twice weekly at 1.6 or 2.0 cm.

Open Access

Abstract

Various insecticides and their application schedules were tested for control of lawn caterpillars on ‘Sunturf’ bermudagrass (Cynodon magennisii Hurcombe) in Hawaii. Chlorpyrifos was the outstanding material tested. Evidence was obtained to show that, if insecticide applications are timed to coincide with insect population peaks, the number of applications for adequate control can be greatly reduced.

Open Access

Abstract

Slow-release N sources (sewage sludge, Agriform, Osmocote, sulfur-coated urea (SCU) and isobutylidene diurea (IBDU)) and a soluble N source (ammonium sulfate) were applied to soil at the rates of 224 and 448 kg N/ha before planting bermudagrass (Cynodon magenisii Hurcombe cv. Sunturf). Yield, % N, and N recovery at 3 cuttings at 30 day intervals were significantly higher at the 448 kg/ha rate than at the 224 kg/ha rate and were highest in the first of 3 cuttings and decreased significantly in the second and final cuttings. The slow-release N sources, except Agriform, generally gave higher yield, % N, and N recovery values than ammonium sulfate, especially at the third cutting and at the higher N rate. Osmocote, SCU and IBDU generally gave higher values than sewage sludge and Agriform.

Open Access
Authors: and

Abstract

Commercial microorganism inoculum was tested for effectiveness in aiding thatch breakdown in common bermudagrass (Cynodon dactylon (L.) Pers.) turf on two golf courses in Hawaii. None of the materials tested were effective in reducing thatch accumulation over a 5-month test period.

Open Access

Abstract

A method was developed for observing root growth utilizing polyvinyl chloride pipe with a removable observation window. The simplicity of the equipment and its ability to permit application of soil compactive forces made it ideal for studies on the effects of soil compaction on root growth. It has also proven to be a valuable teaching aid in horticulture laboratory demonstrations.

Open Access