Compared with a rotary (broadcast) spreader, a drop spreader:
- Covers a large area in much less time
- Throws granules outward in a wide, tapered arc
- Places granules precisely between its wheels
- Needs each pass overlapped by half
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C. Places granules precisely between its wheels
A drop spreader meters granules straight down across its hopper width, giving precise edges next to beds and walks, but it is slow and any gap or overlap shows as a stripe. Wide tapered patterns belong to rotary spreaders.
Reference: Ornamental and turf category manual: calibration and application
The two-step method for imported fire ants in a lawn consists of:
- Broadcasting bait, then treating problem mounds
- Flooding each mound, then mowing it flat
- Spraying the foliage, then watering it in
- Drenching the mounds, then applying a herbicide
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A. Broadcasting bait, then treating problem mounds
A broadcast bait is carried back by foragers and reduces colonies over the whole area, including ones not yet visible; individual mounds in sensitive spots are then treated directly for fast results.
Reference: Ornamental and turf category manual: fire ant management
White cottony fungal growth seen on diseased grass blades in the early morning is an example of a:
- Symptom
- Vector
- Disorder
- Sign
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D. Sign
A sign is the pathogen itself or its parts, such as mycelium, spores or fruiting bodies. A symptom is the plant's reaction, such as a leaf spot, wilting or yellowing.
Reference: Ornamental and turf category manual: plant diseases