Monday, December 11, 2006
0263

Development, reproduction, and survival of papaya mealybug (Paracoccus marginatus Williams and Granara de Willink (Homoptera: Pseudococcidae)) on different host plant species

Kaushalya G Amarasekare, kaushi@ufl.edu, University of Florida, Entomology and Nematology, Tropical Research and Education Center, 18905 SW 280th Street, Homestead, FL, Catharine M. Mannion, cmannion@ifas.ufl.edu, University of Florida, Tropical Research and Education Center, 18905 SW 280th Street, Homestead, FL, and N. D. Epsky, nepsky@saa.ars.usda.gov, USDA-ARS- Subtropical Horticulture Research Station, 13601 Old Cutler Road, Miami, FL.

Papaya mealybug (Paracoccus marginatus Williams and Granara de Willink (Homoptera: Pseudococcidae)) is a polyphagus insect and a pest of various tropical crops and ornamentals. It was introduced into the United States in 1998 in Florida. Papaya mealybug potentially poses a threat to numerous agricultural products in U.S. especially in Florida and states producing similar crops. This study focuses on development, reproduction and survival of papaya mealybug on four commonly found host plants in Florida. The host species include three ornamental plants, hibiscus (Hibiscus rosa-sinensis L.), frangipani (Plumeria sp.), and copperleaf (Acalypha sp.) and a weed species, Santa Maria feverfew (Parthenium hysterophorus L.). Leaves of each host plant were used to rear eggs of papaya mealybug at 25C and 12:12 (light:dark) photo period. Developmental time of egg hatch, each instar and adults were evaluated. Males and females reared from each host plant were paired and eggs produced by mated females were counted till the death of the female. Papaya mealybug was able to develop, reproduce and survive on all four plant species. Adult females emerged within 24-26 days and adult males completed their life cycle within 27-30 days on all host plants. Total number of eggs produced by mated females were within 186 244. Females reared on hibiscus leaves produced a significantly higher number of eggs. Survival of immature stages and adults were significantly lower for Plumeria compared to the other three plant species.


Species 1: Hemiptera Pseudococcidae Paracoccus marginatus (papaya mealybug)
Species 2: Malvales Malvaceae Hibiscus rosa-sinensis (hibiscus)
Species 3: Asterales Asteraceae Parthnium hysterophorus (Santa Maria feverfew)

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