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  • Title: [Ovipositional preference of Grapholitha molesta].
    Author: Gong QT, Li SH, Zhang KP, Wu HB, Liu W, Zhang XP, Sun RH.
    Journal: Ying Yong Sheng Tai Xue Bao; 2014 Sep; 25(9):2665-70. PubMed ID: 25757320.
    Abstract:
    In order to gain better understanding of the oviposition preference of Grapholitha molesta, we studied the ovipositional preference on different host fruit leaves, different parts of peach bran- ches and different varieties of peach in simulated outdoor conditions. The adult ovipositional preference on the host fruit leaves was in descending order, i. e. peach > cherry > apple > plum > pear > crabapple > apricot, and 33.5% of eggs were laid on the peach leaves with the average number of egg on one peach leaf being 8.3. There were differences in egg distribution on both sides of the leaves in different hosts. The number of egg laid on the positive surface was more than on the reverse surface of apple and crabapple leaves, and vice versus for peach, plum, pear and apricot leaves, and 3.3 times more eggs were laid on the reverse surface of peach leaves than on the positive surface. The egg distribution had no significant difference on both sides of cherry leaves. The adult ovipositional preference on peach branches was in descending order of leaf > stipule > petiole > branch. The leaves were the major ovipositonal places with 88.7% of total eggs on. 72.5% of eggs were laid on the 10 leaves near the top unexpanded leaflets, and the maximum number was on the 3rd leaf accounting for 9.3%, while only 1.1% of eggs were laid on the peach leaves after 25th. The ovipositional preference on different peach fruits was in descending order of nectarine > flat peach > prunus persica. The density and characteristics of the hair on host fruits and leaves were the primary factors affecting the ovipositional preference.
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