Spatial Distribution of Tortricid Species and their Natural Enemies
The spatial distribution of tortricid species and their natural enemies varied significantly across aromatic plant treatments (Table 2).
Dynamics of the Three Tortricid Species in Relation to Intercropping Treatments
fbnbriana and the total number of all 3 tortricid species to the various treatments were dynamic (Fig.
Dynamics of the Three Families of Natural Enemies of the Three Tortricid Species
The correlation analyses that were conducted in this study (Table 3) indicated that the densities of the natural enemies regulated the densities of tortricid species.
Intercropping with aromatic plants had significant effects on populations of the 3 tortricid species and their primary natural enemies in an organic apple orchard.
The decrease of tortricid populations may have been due to an attraction of natural enemies to aromatic plants.
STRATIFICATION OF THREE DOMINANT TORTRICID SPECIES AND SPECIES OF THEIR DOMINANT NATURAL ENEMY FAMILIES IN VARIOUS MIXED INTERCROPPING PLOTS IN AN ORGANIC APPLE ORCHARD.
On each side of the tree, three 30 cm twigs from the high, middle and low levels were chosen to check for the presence of tortricids and their natural enemies.
All of the collected adult tortricids and parasitoids as well as other arthropods were taken to the laboratory for identification and counting according to a diagnostic classification guides (Lee 1987; Zheng & Gui 1999; Barnard 1999).