"population" in inglés with examples - Collocation dictionary inglés
- In these circumstances, ants may supplement their honeydew intake by preying on the aphids once the aphid populations have reached certain densities.
- Because the transmission is non-persistent, pesticides do not provide effective control of the virus unless used as a preventative measure to reduce aphid populations.
- In the last three decades, this insect has spread throughout the United States and Canada, and has been a prominent factor in controlling aphid populations.
- Both are relatively nontoxic and will not harm beneficial lady beetles (or the larvae) that feed on scale crawlers and wipe out aphid populations.
- Several generations of an aphid population can exist over the lifespan of a single leaf.
- However if the fall or spring is cool and wet the aphid population decreases and virus spread as decreases.
- Larvae can consume aphids much larger than themselves and may kill many more aphids than they eat when aphid populations are high.
- By mid summer, the number of predators and parasites has built up and aphid populations cease to expand.
- Various factors influence aphid populations.
- Therefore, PLRV can be controlled effectively by reducing aphid populations.
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