Management and within-tree spatial distribution of the small red-belted clearwing borer, <i>Symmthedon myopaeformis</i> (Borkhausen) (Lepidoptera: Sesiidae), infesting dwarfing apple orchards in southern Jordan
Keywords:
Sessiidae, pome fruits, burr knots, clonal rootstocks, cultural control, chemical control, Mondial GalaAbstract
Experiments were conducted in the Ash-Shoubak apple-growing region of southern Jordan to determine the impact of four management practices on reducing populations of the small red-belted clearwing borer, Synanthedon myopaeformis (Borkhausen) infesting apple cultivars grafted on M26, M109, and M106 rootstocks. Results revealed that use of a flexible wire to mechanically kill insect larvae, mounding soil over the graft-union area, wrapping tree trunks with cheesecloth from the soil surface to a height of 80 cm, and use of an insecticidal paint composed of water, copper sulfate, petroleum oil, and Durusban®, all reduced the insect populations compared with untreated control trees. The insecticidal paint treatment caused the greatest population reduction. More S. myopaeformis larvae were recovered from the main trunk of the trees than from main and sub-main lateral branches.References
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