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
A small, light brown cockroach with two dark lengthwise stripes on the shield behind its head is the:
- German cockroach
- Brown-banded cockroach
- American cockroach
- Oriental cockroach
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A. German cockroach
Two dark parallel stripes on the pronotum identify the German cockroach. The brown-banded cockroach is similar in size but has pale bands across the wings and abdomen and no pronotal stripes.
Reference: Structural pest control manual: household and commensal pests
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
In IPM, the action threshold is the:
- Highest rate permitted by the label
- Pest level at which control is justified
- Number of sprays allowed in a season
- Point where the pest has been eliminated
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B. Pest level at which control is justified
The action threshold is the pest density or damage level at which treatment is needed to prevent unacceptable injury or loss. Below it, monitoring continues without treatment.
Reference: Integrated pest management for landscapes and structures
Winged insects are swarming indoors. Which features show they are termites and not ants?
- Elbowed antennae, thin waist, equal wings
- Straight antennae, thin waist, unequal wings
- Straight antennae, thick waist, equal wings
- Elbowed antennae, thick waist, unequal wings
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C. Straight antennae, thick waist, equal wings
Termite swarmers have straight, bead-like antennae, a broad waist and two pairs of wings of equal length. Winged ants have elbowed antennae, a pinched waist and front wings longer than the hind wings.
Reference: Structural pest control manual: termites and other wood-destroying organisms