Date post: | 16-Jul-2015 |
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Behavior Modifying Chemicals
Prospects and constrains
Insects use chemical communication for:
• Finding food
• Finding oviposition sites
• Finding mates
SEMIOCHEMICALS
Semiochemicals
• Pheromones
• Allelochemicals
Pheromones
• Sex pheromone
Pheromones
• Alarm pheromone
Pheromones
• Aggregation pheromone
Pheromones
• Trail pheromone
Pheromones
• Host-marking pheromone
Allelochemicals
• Alomones-benefit sender
• Kairomones-benefit the receiverreceiver
• Synomones-benefit both
Semiochemicals are widely used in IPM
Pheromones and kairomonescan be used as baits.
Semiochemicals are widely used in IPM
• Mass trapping
• Attract and kill
• Lure and infect
Mate Disruption
Semiochemical uses
• Detect presence of a species
• Measure seasonal activity
• Provide decision support
• Mate disruption
• Assess levels of insecticide resistance
1mg
152 Km
15 ha
Aren’t pheromone catches biased?
• Females are the ones that oviposit
• Females are directly linked with larval abundance
• Females do not move as much as males in many species
• Some baits that are food based attract both sexes but are less specific.
Mating Disruption Work best if:
• Pests do not have wide range
• Pests are poor dispersers
• Pest densities are not too high
• Male sensitivity to pheromones is high
Male antennae react to specific pheromone blends
Pheromones are affected by climatic factors