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138<br />

J.D. DUTCHER ET AL.<br />

replacement <strong>and</strong> resurgence problems associated with repeated treatment with<br />

insecticides <strong>and</strong> miticides (Dutcher, Fonsah, & Hudson, 2006).<br />

Table 1. Control methods for the eight major pecan arthropod pests in North American.<br />

Pest Control method for pest a Relative efficacy b<br />

Pecan weevil<br />

Curculio caryae (Horn)<br />

Pecan nut casebearer<br />

Acrobasis nuxvorella (Neunzig)<br />

Hickory shuckworm<br />

Cydia caryana Fitch<br />

Black pecan aphid<br />

Melanocallis caryaefoliae Davis<br />

Yellow pecan aphid<br />

Monelliopsis pecanis Bissell<br />

Blackmargined aphid<br />

Monellia caryella Fitch<br />

Pecan leaf scorch mite<br />

Eotetranychus hicoriae<br />

(McGregor)<br />

Kernel-feeding Hemipterans –<br />

Pentatomidae <strong>and</strong> Coriedae<br />

Broad spectrum insecticides<br />

Quarantine<br />

Risk rating <strong>and</strong> spot treatment<br />

Trunk treatment<br />

Entomopathogens, nematodes<br />

Red imported fire ant as predator<br />

Broad spectrum insecticides<br />

Biorational insecticides<br />

Mating disruption<br />

Broad spectrum insecticides<br />

Biorational insecticides<br />

Sanitation<br />

Organophosphate insecticides<br />

Neonicitinoid insecticides<br />

Insecticidal soap<br />

Harmonia axyridis (Pallas)<br />

Interplanting crape myrtles<br />

Systemic insecticides<br />

Neonicitinoid insecticides<br />

Insecticidal soap<br />

Harmonia axyridis (Pallas)<br />

Introduced parasites<br />

Systemic insecticides<br />

Neonicitinoid insecticides<br />

Insecticidal soap<br />

Harmonia axyridis (Pallas)<br />

Introduced parasites<br />

Miticides<br />

Sulphur<br />

Predatory mite release<br />

Dormant oil sprays<br />

Broad spectrum insecticides<br />

Trap crops<br />

Removing alternate host plants<br />

High<br />

High<br />

Moderate<br />

Moderate<br />

Low<br />

Low<br />

High<br />

High<br />

Low<br />

High<br />

High<br />

Moderate<br />

High<br />

Moderate<br />

High<br />

Moderate<br />

Low<br />

High<br />

High<br />

High<br />

Low<br />

Low<br />

High<br />

High<br />

High<br />

Low<br />

Low<br />

High<br />

High<br />

Moderate<br />

Low<br />

Moderate<br />

Low<br />

Low<br />

a<br />

b<br />

Control methods listed in the table have shown benefits greater than the costs.<br />

Efficacy ratings: total = 100%; high = 91–100%; moderate = 80–90%; low < 80%.<br />

Insecticides offer the single most effective control method for nut-feeding<br />

insects. Carbaryl, phosmet, esfenvalerate <strong>and</strong> cypermethrin are used during the late<br />

season for control of pecan weevil, hickory shuckworm <strong>and</strong> kernel-feeding

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