Biocontrol: Spider mite

3. Biological pest management: Spider mite Spider mites are a major pest in many crops . Their great reproductive capacity enables them to cause enormous damage in a short period of time . In many protected crops the two-spotted spider mite (Tetranychus urticae) is the most common pest . Mirical-N Spical (-Plus) Spidend Spidex Damage symptoms Solutions • Spider mite larvae, nymphs and adults feed on the underside of leaves and cause yellow spots . In severe cases, yellowing of most of the leaf may occur . This results in decreased plant growth and production . Eventually, the crop may die from the infestation . • Nymphs and adults produce webbing that can cause cosmetic damage to the crop . If large numbers of spider mites are present, plants may be completely covered with webs . Methods of control Mirical-N • Predatory bug: Macrolophus pygmaeus • Primary target: broad spectrum including twospotted spider mite • Packaging: nymphs bottled with inert carrier material Spical (-Plus, Ulti-Mite) • Predatory mite: Neoseiulus californicus • Primary target: two-spotted and fruit tree red spider mites • Packaging: adults bottled (Spical) or all stages of predatory mites in sachets (Spical-Plus, Spical UltiMite) with inert carrier material Spidend Predatory mites: adult predatory mites and nymphs actively search for their prey and suck them dry . Predatory bugs: adults and nymphs actively search for mites on which to feed . • Gall midge: Feltiella acarisuga • Primary target: various species of spider mites • Packaging: pupae attached to leaves in plastic container Spidex • Predatory mite: Phytoseiulus persimilis • Primary target: two-spotted spider mite • Packaging: adults bottled with inert carrier material For additional information regarding introduction rates, chemical usage, etc. consult your local Koppert representative or visit Important! Only use products that are permitted in your country or state. 12

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