FLORIDA LAWN PESTS
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Plaster Bagworms
Phereoeca uterella |
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Appearance:
Plaster bagworms are similar in appearance and closely related to clothes moths. The fully developed larvae are about 7mm long, with a dark brown head, a white body and three pairs of legs with hook-like appendages at their tips. They are also known as the household casebearer.
Behavior:
After mating, females lay their eggs on crevices and the junction of walls and floors, cementing them on debris. The female may deposit up to two hundred eggs over a period of a week, after which she dies. The larvae are usually not seen; the larval case, which the plaster bagworm carries around wherever it feeds, is what is most often recognized.
The case is silk-lined and open at both ends. It is used by the larvae, which hide in the case when disturbed. The plaster bagworm |
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also has three hardened plates close to its head which are believed to be used to protect it from natural enemies when it reaches out of its case to move.
Habitat:
Plaster bagworms are easily seen on light-colored walls. Close examination of the house may reveal bagworms attached to the underside of chairs, bookcases, and other furniture. They are often found along foundations, near baseboards, or on the lower edges of walls. It can also be found under spider webs, in garages, on wool rugs and carpets; outdoors, cases are seen hanging under farm sheds, lawn furniture, on farm machinery and on tree trunks.
The cases of these creatures constructed by the larval or caterpillar stage often attract attention when found in Florida homes. However, only the empty larval or pupal cases of the household casebearer are seen on walls of houses in south and central Florida. The larvae mainly feed on spider webs; however, they will also feed on fabrics made of natural fiber as well.
Interesting Fact:
The most common and abundant food of the plaster bagworm in Florida is old spider webs, which are consumed in large quantities.
Control:
Control of plaster bagworms is similar to control of clothes moths. Good housekeeping is important, especially the removal of spider webs. Sweep down and remove any spider webs and bagworm cases.
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