[Ovipositional preference of Grapholitha molesta].

Area of Science:

• Entomology
• Agricultural Science
• Pest Management

Background:

• Grapholitha molesta, the oriental fruit moth, is a significant agricultural pest.
• Understanding oviposition preferences is crucial for developing effective pest management strategies.

Purpose of the Study:

• To investigate the oviposition preferences of Grapholitha molesta on various host plants and plant parts.
• To identify key factors influencing oriental fruit moth egg-laying behavior.

Main Methods:

• Simulated outdoor conditions were used to study oviposition on different host fruit leaves, peach branches, and peach varieties.
• Egg distribution was quantified on leaf surfaces, branch parts, and fruit types.

Main Results:

• Peach leaves were preferred over other host leaves (peach > cherry > apple > plum > pear > crabapple > apricot).
• Eggs were predominantly laid on the reverse side of peach leaves and on leaves near the top of branches.
• Oviposition preference among peach varieties was nectarine > flat peach > prunus persica.

Conclusions:

• Leaf surface characteristics, particularly hair density, are primary drivers of Grapholitha molesta oviposition.
• Targeting specific leaf areas and host plants can aid in oriental fruit moth control.