Gypsy Moth - Lymantria dispar Most destructive defoliating insect in North America Kills Conifers and Hardwoods Nuisance in urban areas Cause medical problems.

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Presentation transcript:

Gypsy Moth - Lymantria dispar Most destructive defoliating insect in North America Kills Conifers and Hardwoods Nuisance in urban areas Cause medical problems as some allergic to “hairs” Introduced insect pest Billions of dollars has been spent on this creature One of the “Big Bug” research areas Eventually will be in Georgia & Alabama

Trouvolet and Introduction video

Spread

Mountain Side Defoliated by Gypsy moths

Gypsy Moth Life Cycle

Adult males emerge in June – July and locate females using pheromones. Note feathery antennae of male

Gypsy Moth Females and Egg Masses on Tree Trunk

Female lay egg masses on tree trunks or other vertical objects. An egg mass contains 100 – 1500 eggs which are the over- wintering stage.

Eggs hatch the following spring. Gypsy Moth first instar larvae

Larvae emerge in Mid- April and disperse by “ballooning” Have very long “hairs” are easily airborne

Instars 4-6 feed on new foliage first and then move on to older foliage if necessary

Mature Gypsy Moth larvae are large insects and one can eat several leaves a day.

Gypsy Moths often pupate on tree trunks. Pupae are found in June and July which lasts about 2 weeks. Pupal case

Adults emerge, find each other and the cycle continues. One generation per year. Females do not FLY.

Gypsy Moth Ecology

Natural enemies Parastoids: Pathogens: Predators: Climate: Management Considerations

Ant attacking Gypsy Moth Pupa

White footed mice eating Gypsy Moths

Diptera Parasitoid on egg masses

Gypsy Moth Video

Management Considerations

Alabama Gypsy Moth Survey Program Part of USDA Forest Services “Slow the Spread” Program Cooperative effort between USDA/APHIS, Auburn University & Alabama Extension Service

Gypsy Moth: Slow the Spread Program Expectations: 1) 2) 3)

Slow the Spread has three main thrusts Trapping—Officials monitor gypsy moth populations by placing a grid of pheromone-baited traps to allow early detection in of the moth in new areas. Suppression— Reduce populations using various options including 1) mating disruption with pheromone flakes, 2) mass trapping; 3) releases of sterile insects; 4) spraying with Bacillus thuringiensis (Bt), diflubenzuron (disrupts development) or the NPV virus Gypchek®. Regulatory Work —Human movement of infested articles is a major factor in spread. Regulatory actions to reduce such movement will be enforced.

Pheromone Trap and dispensers

Gypsy Moth captures – 2000 Jefferson Winston Morgan

Gypsy Moth captures – 2001 Cleburne Barbour Butler

Gypsy Moth captures – 2002 Limestone Winston Greene Dallas Tuscaloosa

Gypsy Moth captures – 2003 Lauderdale

Gypsy Moth captures – 2004 Madison Blount Calhoun

End of Gypsy Moth Section