We report for the first time the presence in Florida and the Continental United States of Crypticerya genistae (Hempel) (Hemiptera: Monophlebidae) (Fig. 1 and Fig. 2), an invasive scale insect native to Brazil. Crypticerya genistae was described by Hempel (1912) (as Icerya genistae) from specimens collected on Genista scoparia (L.) Lam., Lespedeza striata (Thunb.) Hook. & Arn., and Fragaria L. species from Brazil. There is very little information available on the biology of this insect. It is reported as a pest of vegetable crops including peppers, tomatoes, eggplants and peanuts (Barbados Ministry of Agriculture ( http://barbados.gov.bb).
On Jul 7, 2005 USDA-APHIS-PPQ port inspectors Margarita Lahens and Heather Hursh made the first U.S. collection of C. genistae on a Sesbania species at Port Everglades in Ft. Lauderdale, Florida. The species was officially determined to be I. genistae in Aug 2006 by Cory Unruh and Dr. Penny Gullan by comparing specimens from Florida with type specimens of Icerya genistae borrowed from Brazil. The taxon was moved from Icerya to Crypticerya in 2007 by Unruh & Gullan (2007) in a revision of the generic classification of the Monophlebidae. This species is not represented in Morrison’s key (1928) to the Margarodidae. Based on Morrison’s key, the species keyed out between Icerya rileyi Cockerell and Icerya littoralis Cockerell. These species are native to North America; I. rileyi is found in the deserts of the southwestern United States and northern Mexico and I. littoralis is found in the tropical regions of Mexico (Morrison 1928).
The adult females of I. rileyi and I. littoralis have a very long (up to 30 mm), slightly fluted ovisac and the body becomes dark purple-gray with age. The microscopic features of these species are very similar, but 2 important differences should be noted. First, they differ from one another by the shape of the pores forming the outer edge of the ovisac band. Specifically, those pores in I. littoralis generally have a bilocular center and 4-6 outer loculi. In contrast, the pores of I. rileyi and C. genistae generally have a trilocular center, but differ by the number of outer loculi: I. rileyi has 6-10 and C. genistae have 9-12. Second, they differ by the shape of the flagellate setae present in the ovisac band. The setae of Crypticerya genistae are dense, robust and have very rounded bases. In contrast, the setae of I. rileyi are shorter and stouter with slightly flattened bases and the flagellate setae of I. littoralis are very fine with completely flattened bases.
Upon the detection of this exotic/invasive scale insect, a survey of the nearby area was conducted. Plant inspectors from the Florida Department of Agriculture and Consumer Services Division of Plant Industry (FDACS-DPI) detected C. genistae in additional locations within Broward County outside of the initial infestation site and also in Miami-Dade County. There were a total of 80 positive samples from Jul 2005 through Dec 2006 of C. genistae ranging from 1.6 to 52.5 km from the initial site. One of the additional sites was near the Miami International Airport, 46.3 km from the Port Everglades find. It is not known if sites further south from 29-52.5 km had the same origin as the Port Everglades population or if there were 2 independent infestations.
Crypticerya genistae is the second non-native species of Icerya found in Florida. The first being Icerya purchasi Maskell, the cottony cushion scale (Fig. 3). Crypticerya genistae field specimens superficially resembles I. purchasi in that both species have a light orange body, black legs, and a fluted ovisac, but differ in ovisac length, microscopic features, and relative head position. The 2 species are distinguished from one another by the presence of 2 pairs of abdominal spiracles in I. purchasi compared to 3 pairs present in C. genistae. The ovisac of C. genistae is approximately 20 mm long and held either parallel to host plant material or erect. In contrast, the ovisac in I. purchasi is about 6 mm long and tapers downward to the host plant material (Fig. 3). Icerya purchasi also has large open-center pores clustered around the margin of the body that produce long glassy filaments of wax that surround the adult female. These are absent in Crypticerya genistae.
Although C. genistae has been reported as a pest of peppers, eggplants, tomatoes, and peanuts in Barbados, in Florida there have been no infestations occurring in agricultural crops or ornamental plants. Plant hosts for Florida have been restricted to common roadside plants (Table 1). No specific life history information is currently available for C. genistae. No natural enemies have been detected in Florida populations. This is FDACS-DPI Contribution Number 1057.