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1 P QUBB@RtBBRB T S TME TO UPDATE THE CPPDR MALNG LST! F YOU WSH TO CONTNUE RECEVNG THS PUBLCATON, PLEASE FLL N AND RETURN THE FQRM ON THE NSDE BACK COWER OF TH1S SSUE S t Concerns.... ner... ts...

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3 CPPDR lanuary-may 1995 Page 3 - ENTOMOLOGy HGHLGHTS - SlGNlFCANT FlNDS MEXCAN FRUT FLY, Anastrepha ludens, -(A)- A Mexican fruit fly was found in a McPhail trap by Lopez on May 19 in Los Angeles, Los Angeles County. ARTCHOKE FLY, Terelliafuscicornis, -(Q)- Artichoke flies were found on Silybum marianum in Nipomo, San Luis Obispo County. Little made the finds on April 12. AFRCANZED HONEY BEE (AHB), Apis "Africanized", -(A)- An AHB bee was trapped in an AHB trap in Blythe, Riverside County, on March 20. This is the first trapped AHB bee this year. On March 27, an AHB bee swarm was detected in El Centro, mperial County. On the next day, March 28, an Africanized honey bee was trapped in Calipatria, mperial County. Also in the same county, Ray and nay discovered an AHB bee swarm in mperial on May 4. NEW COUNTY RECORDS AUSTRALAN GUM TREE WEEVL, Gonipterus scutellatus, -(Q)- An Australian gum tree weevil was detected on a eucalyptus tree on the UCSD campus, La Jolla, San Diego County. The find was made by Kellam and Shaw on April 18. AVOCADO MTE, Oligonychus perseae, -(Q)- Avocado mite has been found for the first time in Santa Barbara County. Harriet Heath discovered the pest on Persea americana on March 21 in Carpinteria. This mite has also been found in Los Angeles County for the first time. Found on the same host species, the find was made by Thomas Herrera in South Gate on April 6. CYTSUS PSYLLD, A ytainilla spantiophila, -(C)- Jim Xerogeanes discovered cytisus psyllid on Cytisus scoparius in Caspar, Mendocino County. This new county record occurred on March 31. EUGENA PSYLLD, Trioza eugeniae, -(C)- This psyllid pest was also found for the first time in Mendocino County on March 31. Jim Xerogeanes made this find in Fort Bragg on Eugenia SP. A GRASS MEALYBUG, Miscanthicoccus miscanthi,-(q)- This grass mealybug was found for the first time in Santa Barbara County. Suzanne Squires made the find in Santa Barbara on February 22. KUNO SCALE, Eulecanium kunoense, -(B)- Kuno scale was found for the first time in Napa County. Joel King made the collection in Napa on February 9.

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9 CPPDR lanuarv-mav 1995 "A", "B", and ''a Rated Pests on Tropical Fruits lntercepted in Quarantine May 1995 Alan Alan Alan Alan Alan Alan Alan Alan Watkins Eaton Pastalka Pastalka Pastalka Pastaka Cunningham Maggi Maggi/Farley Maggi/Farley Pastaka Eaton Pseudococcus near citriculus Pseudococcus elisae Aulacaspis sp. Drepanococcus chiton Pseudaonidia trilobitifonnis Pseudaulacaspis sp. Pulvinaria psidii Gastropoda Technomynnex albipes Ceroplastes rubens Pulvinaria psidii Aspidiotus destructor Phnococcus minor Pseudaonidia trilobitifonnis coccus sp. Formicidae Phnococcus minor Pseudococcus near citriculus Aonidiella sp. Phnococcus minor a mealybug elisa mealybug an armored scale a sofi scale trilobe scale an armored scale green shield scale snails and slugs an ant red wax scale green shield scale coconut scale Pacific mealybug trilobe scale a sofi scale an ant Pacific mealybug a mealybug an armored scale Pacific mealybug Taiwan? Taiwan? Taiwan? Taiwan? Taiwan? Taiwan? Thailand Thailand Thailand Asia? ALA SCL SCL SCL ALA Garcinia mangostana rambutan Litchi chinensis Litchi chinensis Litchi chinensis Litchi chinensis Litchi chinensis rambutan Garcinia mangostana Litchi chinensis Litchi chinensis Garcinia mangostana rambutah Garcinia mangostana Litchi chinensis Litchi chinensis lycheelrambutan lycheelrambutan Garcinia mungostana Garcinia mangostma

10 Nestor Papilli Sium Papilli Papilli Guise Fernandez Fernandez Rohn Bakri Bakri Allan Morton Bakri Hajik Hajik Do Fernandez Bianchi Garcia Ro hn Olmsted Ban ta Hono Kala Fernandez Reed Squires Papilli Olmsted Sithole Fernandez CPPDR -- January-May Page 10 "A", "B", and "a' Rated Arthropods and Mollusks lntercepted in Quarantine November May 1995 Zabrotes subfasciatus Pseudococcus citricufus Geococcus coffeae Anopfokpis fongipes Bambusaspis mifiaris Ofigonychus sp. Crenodorsum sp. Ahrotufus sp. Hemiberfesia sp. Chrysodeixis eriosoma Autographs sp. Theba pisana Cy~sf.micarius efegantu Bfissus sp. Dasineura balsamicola Dasineura balsamicola Chionaspis heterophyflae Monomorium Jloricola Coccus capparidis Pinnaspis unifo ba Chorizococcus sp. Coptosoma sp. Rhizoecus hibisci Coccus acutissimus Rhizoecus Jlo rida n us Phikphedra tu bercu fosa Andapis feucophkae Geococcus coffeae Araeocorynus cumingi Camponotus abdom. Jloridznus Kuwanaspis hikosani Mexican bean weevil a mealybug a soil mealybug longlegged ant a bamboo pit scale a spider mite a whitefly anthurium whitefly an armored scale green garden looper a plusine looper white garden snail sweetpotato weevil a chinch bug balsam fir gall midge balsam fir gall midge pine scale an ant capparis soft scale unilobed scale a mealybug a coptosomid bug a root mealybug slender soft scale a mealybug a soft scale a diaspidid scale a soil mealybug mauna loa bean beetle carpenter ant a bamboo diaspidid scale Mexico ORA LAX LAX LAX LAX? CCA ORA Texas ORA? MAD LAX 2 LAX ~taly SJ Q Louisiana SCR Maine LAX Maine MEN Maine MEN Michigan ORA ORA SAC SMT? MAD LAX ALA ORA Costa Rica SBA LAX KRN ORA dry beans Phormium sp. Chamaedorea sp. tropical plants tropical plants Mangifera sp. Monstera sp. palm Tillandria sp. fresh produce herbs Genista sp. pomoea sp. fresh produce Abies sp. Abies sp. Pinus sp. cut flowers area palm Zingiber sp. Tiflandtia sp. automobile Ravenea sp. Cycas sp. Phoenix sp. croton banana Ficus sp. Phoenix sp. Canavafia sp. bee hives Phyffostachys sp.

11 Fonseca Wynn Eaton Bakei Reed Reed Tracy Dimock Reed WionCoen Fernanda Kawakami Sohal Pendleton Garibaldi Schmitz Wion Sium Olmsted Davidson Squires Rabe Rogoyski Wynn Rogoyski Shook Banta Papilli Banta Wion Sohal Rogoyski CPPDR lanuarv-mav 1995 Trionymus sasae Hemiberlesia dzfinis Coccotlypes sp. Sybra alternans Spodoptera sunia Coccus capparidis Coccus capparidis Dreissena polymorpha Coccus capparidis Monochamus sp. Rhizoecw joridunus Thyreocoridae Pakocallidium ru$penne Dysmicoccus mackenziei Monomorium firicola Tetranychina sp. Paleocallidium ru$penne Geococcw cofeae Coptosoma xanthogramma Miscanthicoccus miscanthi Barnbusaspis miliaris Melormenis antillarum Philephedra tuberculosa Ahrocerus palmae Philephedra tuberculosa Calycomyza sp. Rhizoecw americanus Rhizoenrs americanus Anastrepha obliqua Parlatoria pergandii Carukzspis gtffardi Parlatoria pergandii a mealybug diffinis scale a bark beetle a longhorned beetle white-spotted armyworm capparis soft scale capparis sofi scale zebra mussel capparis sofi scale a pine sawyer a soil mealybug a negro bug a longhorned beetle MacKenzie mealybug an ant a tetranychid mite a longhorned beetle a soil mealybug black stink bug a grass mealybug a bamboo pit scale West ndian flatid a sofi scale palm whitefly a sofi scale a leafminer a soil mealybug a soil mealybug West ndian fruit fly chaff scale an armored scale chaff scale Oregon Mexico Costa Rica New York Chile Costa Rica Japan Guatemala Guatemala?? Texas Mexico New York China CCA ORA ALA LAX Rrv VEN ORA LAX SMT SMT SMT ALA LAX SBA SBA LAX SCL ORA SCL LAX LAX LAX SCL Fargesia sp. Ficus sp. Brahea sp. herbs Aralia sp. Schejlera sp. Sch@ra sp. boat Schera sp. Nothofagus sp. SY~P SPcontainer reefer dunnage Tillandtia sp. gingerhi Schera sp. dunnage Caryota sp. automobile Miscanthus sp. bamboo automobile Spathiphyllum sp. palm Spathiphyllum sp. Ocimum sp. Ravenea sp. Ravenea sp. Mangfera sp. Citrus sp. fruitlleaves Ravenea sp.

12 CPPDR lanuarv-mav 1995 Page 12 Spodoptera latifascia Nezara viridula Thrips hawaiiensis Echinothrips americanus Thrips hawaiiensis Thrips hawaiiensis Philephedra tuberculosa Thrips Jorum Thrips hawaiiensis Thrips palmi Orchidophilus sp. Epicaerus sp. Oxydema sp. Camponotus sp. Brachycyttarus griseus Thrips hawaiiensis Philephedra tu bernrlosa an armyworm southern green stink bug an flower thrips a thrips an flower thrips an flower thrips a sofi scale a flower thrips an flower thrips a thrips a weevil a weevil a weevil a carpenter ant a bagworm an flower thrips a sofi scale Texas So. America LAX ORA CCA CCA YUB SCL ORA ORA ORA ALA LAX ALA SCL CCA SCL Cordyline sp. Ocimum sp. flower lei Gardenia sp. Banksia sp. tropical flowers Spathiphyllum sp. protea sp. protea sp. protea sp. Anthurium sp. herbs tropical flowers Dracaena sp. malongoy Gardenia sp. Spathiphyllum sp. Moretto Sium Fernandez Fonseca Wion Martin Rogoyski Fernandez Fernandez Fernandez Peek Bakri Peek Moretto Maggi Fonseca Rogo yski

13 CPPDR January-May 1995 Page 13 BORDER STATKNS ZEBRA MUSSEL, Dreissena polymorpha, -(Q)- Live zebra mussels were once again discovered on a boat bound for San Diego. This time the pest was found in the starboard intake of a 40 foot yacht being shipped from Michigan. The find was made by Cliff McDonald on March 6 at the Needles Station. This is the third interception of zebra mussel at the California border stations. PAPAYA FRUT FLY, Toxotypana curvicauda, -(X)- A heavy infestation of live papaya fruit fly larvae were found in a commercialshipment of Mexican papayas bound for San Jose. Andy Lacy discovered the pest at the Vidal Station on April 16. The following list outlines some of the important discoveries of pests of tropical fruits at the border stations during the summer of See report on similar finds on page 9. - Pest Station Longan Scale -- HO Thysanoforinia nephelli HO DO HO HO HO HO HO Mealybugs HO Date 07/15 07/23 08/16 08/21 08/25 08/26 09/06 09/19 07/ 19 Oricin Canada Canada Canada Oregon Washington Canada Canada Canada Washington Collector Calvery Johnson Chapman Johnson Smith Zavala Brown Johnson Johnson Host longans longans long ans longans longans long ans longans longans rambutans A total of 178 ant discoveries were made at California's border stations since last summer. The following list outlines the finds: Common Name FLORDA CARPENTER ANT CARPENTER ANT RED MPORTED FRE ANT FRE ANT BGHEADED ANT BLACKHEADED ANT VAROUS ANT PESTS Scientific Name Camponotus abdominalisfloridanus Camponot us sp. Solenopsis invicfa Solenopsis sp. Myrmicinae Pheidole megacephala Tapinoma melanocephalum Monomorium floricola Pheidole sp. Tapinoma sp. Tetramorium sp. Formicidae Ponerinae # Finds S tapelyear live/dead adults, 1995 live adults, 1994/95 live adults, 994/95 live adults, 1994/95 live adults, 1994/95 live adults, 994 live adults, 1994/95 live adults, 1995 live adults, 994/95 live adults, 1994/95 live adults, 1994/95 live adults, 1994 live adults, 1994

14 CPPDR January-May 1995 Page 14 *- OTHER SGNFCANT CONCERNS -* CTRUS PEEL MNER, Marmara salictella (?), -(C)- A lot of interest has been generated over the appearance in several years ago of the very serious citrus pest called citrus leaf miner, Phyllocnistus citrella (see CPPDR 12[fl-2]:15-17). That pest is certainly one to be reckoned with and would have a very serious impact on California citrus production. However, California has already had a leafminer problem on citrus for a number of years. The citrus peel miner has been a pest off and on since the mid 1950s in the Coachella Valley area of Riverside County. The following report by Dr. Eldon Reeves, Entomologist with the Riverside County Agricultural Commissioner's office, with minor modifications by the editor, outlines the problem: ClTRUS PEEL MlNER PROBLEMS from a report by Eldon L. Reeves Entomologist, Riverside County A high population of this citrus pest has occurred in several citrus groves, primarily grapefruit, in the Oasis area of the Coachella Valley the past two seasons. This has been an ongoing citrus pest for several years. There was considerable loss due to this pest, in this same community, in Dr. E. L. Atkins, Jr., of the University of California, Citrus Experiment Station in Riverside, pointed out in a paper entitled Citrus Peel Miner (in The California Citrograph, Sept. 1961) that this is an important economic pest of citrus and that its preferred host plant in this area is oleander. The larvae mine between upper and lower layers of epidermis on new oleander growth and occasionally mine the upper surface of oleander leaves and stems. When high populations of this small moth build up in oleander, as we have observed in the Oasis area the past two seasons, the adult moths tend to be carried by wind currents to the citrus groves in the area. Grove inspections this past fall revealed extensive insect damage to the citrus fruit, with obvious crop losses to the growers. There is a cultural practice that has been used to control this pest. t has been used quite successfully on several occasions within the Coachella Valley. t consists of removing all of the oleander plants within approximately 1 /2 to 3/4 of a mile of any given citrus grove, thus eliminating this source of the insect pest. By this method there would be very little, or no, pesticides involved in controlling this insect pest on the oleander or on the citrus fruit, consequently, it would be an environmentally friendly approach. This could be a fine example of ntegrated Pest Management, or Sustainable Agriculture, whereby a crop pest is brought under control, for an extended period of time, without the use of pesticides.

15 CPPDR January-May 1995 Page 15 Another plus for removing oleander, as well as caster bean and Jimsonweed from your community, would be for the safety of the children. All three of these plants are quite poisonous. A summary of information contained in the report by E.L. Atkins in his California Citrograph article indicates that the miner burrows between epidermal layers of the leaves of the favored host, oleander. The oleanders are frequently planted in the area as wind breaks. Apparently, when populations build up on oleander, the insect moves into citrus that may be nearby, especially grapefruit. The larvae then mine the epidermal area of the fruit peel, particularly on fruit on the inside of the tree and near the ground. Occasionally they will also mine the young twigs. Multiple individuals may be present in the same fruit. The mines are small, almost hairlike streaks at the start, but as the insect grows, the mines become wider. The mines can be numerous, curved, often cross and recross each other, and usually end in a relatively wide blotch just under the rind surface. n some instances, the whole fruit surface may be blistered and resemble the peeling skin of a badly sunburned person. The damage is strictly cosmetic but the fruit is rendered unsaleable in the fresh fruit market. The species was described in 1863 from specimens found mining the leaves of willow in the eastern United States. t was first recorded attacking citrus in 1917, in southern California. Periodic reports appeared in 1933, 1948 and in the late 1950s in various areas in southern California. t has also attacked citrus in Yuma, Arizona. The report by Dr. Reeves covers some of the more recent episodes of damage. According to CDFA Lepidopterist Tom Eichlin, there may be a species complex involved with this insect on the various hosts that it has been found to attack, and that the entity on oleander or citrus may or may not be salictella. Dr. Don Davis, National Museum of Natural History, Smithsonian nstitution, has been trying to resolve this complex problem since early on. Specimens have been difficult to obtain. Eggs are deposited singly on the epidermis of the current stem growth of oleander, and on the twigs of flush growth and peel of green fruit of citrus. Females produce about 20 eggs. The larvae burrow from the egg directly into the epidermis, where they mine, feed and develop through six instars. The last stage larva cuts a hole in the epidermis and travels to a secluded niche to pupate. The adult moths are small, brownish with an irregular silvery band on the basal third of the forewing. Adults are active right at dusk. A life cycle lasts approximately days. References Arizona Cooperative Survey A peel miner (Marmara salictella). n Cooperative Economic nsect Report (CER) 10(48):1100. Atkins, E. L. Jr Citrus peel miner. n The California Citrograph, September 46(11): Atkins, E. L. Jr Citrus peel miner, more problems in the desert. n The California Citrograph, June 56(8):245246,267. Clemens, J. B North American microlepidoptera. Proc. Ent. Soc. Phil DeGryse, J. J The hypermetamorphism of the lepidopterous sapfeeders. Pm. Ent. Soc. Wash. 18(1): Lockwood, Stewart Orange peel miner. Calif. Agr. Monthly Bul Vinal, S. C Notes on the life-history of Marmara elotella Busck, a lepidopterous sap feeder in apple twigs. Jour. Econ. Ent. 10(5):W%. Woglum, R S A willow pest that occasionally injures oranges. Calif- Fruit Growers Exchange, Pest Control Circular No. 168, p. 658.

16 CPPDR January-May 1995 Page 16 Fig. 6. Citrus peel miner, Marmara salicfella (?). A: Beginning mine. B, C: Multiple mines affecting more fruit surface. D: Severe and often complete blistering of epidermal layers of fruit.

17 CPPDR January-May 1995 Page 17 + BOTANY HGHLGHTS + HYDRLLA, Hydrilla verticillata, -(A)- The following report on a significant race of hydrilla was prepared by State Plant Taxonomist, Doug Barbe. For further information of hydrilla in California, see CPPDR 13(3-4):35-36,38. An established monoecious race of Hydrilla has been identified from Clear Lake, Lake County, California, and from Pipe/Lucerne Lake, a small private lake south of Seattle, near Auburn, King County, Washington. The significance of these populations lies in a study published by Kerry Steward, USDA- ARS, Ft Lauderdale,, in the journal Aquatic Botany, 46(2): (1993). Steward evaluated the potential for sexual reproduction in the various races in an international Hydrilla germplasm collection representing races of Hydrilla from Africa, Pakistan, ndia, Nepal, China, Korea, Taiwan, Malaysia, ndonesia, Papua New Guinea, Australia, New Zealand, Panama, and the United States. Crosses between dioecious and monoecious races of Hydrilla verticillata resulted in seed production in 40 of the 56 crosses (71%). Seeds from 90% of these crosses were viable and most seedlings survived. The dioecious female race, established in the US since the 1950s, has never been reported to produce seed in the United States. This female race was discovered to be one of the greatest seed producers in the crosses. This race has been reported to be triploid, but seed from four of its five crosses were viable. Triploids are generally sterile, so these findings raise questions about the reported ploidy level of this race. Another observation, not previously reported for Hydrilla, was the occurrence of monoecious offspring from dioecious parents. The reported lack of seed production in the US female plants of the dioecious race apparently has been due to the absence of a viable pollen donor. On the next three pages are the updated California weed distribution maps for the first part of 1995.

18 STATE OF CALFORNA 5 DEPARTMENT OF FOOD AND AGRCULTURE DVSON OF PLANT NDUSTRY - ANALYSS & DENTFCATON/BOTANY 18 DTECTON MANUAL D. T. 6:51a Revised 1 /20/95 l ) ( / l l ~ / l / ( l l ~ ~ / ) ~ / / l / ~ / l l ~ ~ l l 1 ) ~ l l l ~ ~ l l 1 ~ ) / 1 1 ~ ~ l 1 1 ~ ~! W W W W D E E E E E E E E E E E E E E - - Centaurea calcitrapa purple starthistle Pest rating: B

19 25N - STATE OF CALFORNA DEPARTMENT OF FOOD AND AGRCULTURE DVSON OF PLANT NDUSTRY - ANALYSS & DENTFlCATlONlBOTANY 19 DETECTON MANUAL D. T. 6:57a Revised 2/9/95.. lllllll J ~ ~ ~ ( ~ ~ ~ ) ( ~ 1 l1 l 1 ~ ~ l l l ~ ~ l l l J / l l l ~ l ~ ~ - -- W w w w 5D le de El E5 Em E~ Em Es E! E! E w E s E w E ~ m L. - Cynara cardunculus artichoke thistle Pest rating: B m- townships of past or present infestations 25S M S W W W W D E E E E E E E E E E E E E E lllll/lllllllllllll111l1l111ll1 - r25s E E E E

20 STATE OF CALFORNA DEPARTMENT OF FOOD AND AGRCULTURE DVSON OF PLANT NDUSTRY - ANALYSS & DENTFCATON/BOTANY 20 DETECTON MANUAL D. T. 6:3a Revised 1 /20/95 Onopordum acanthium Scotch thistle Pest rating: A m- townships of present infestations a- townships of past infestations & ' E E E E E E ll ll ll W W W W W W W B E E E E E E E

21 CPPDR January-May 1995 Page 21 ATTENTON CPPDR READERS!! We are in the process of updating the mailing list for the CPPDR. f you wish to continue uninterrupted receipt of this publication, please fill out the address form below and return at your earliest convenience to: CPPDR State of California Department of Food and Agriculture Plant Pest Diagnostics Center 3294 Meadowview Road Sacramento, CA The following folks are not required to return the address form below: *County Agricultural Commissioners *Established Libraries APHS or NAPS Personnel *People who have requested receipt of the CPPDR within the last six months - ~ REQUEST FOR CONTNUED RECEPT OF THE CPPDR: 1 Name, Title: Affiliation: 1 1 Department: Address: City, State, Zip: We also welcome comments, questions, or suggestions from our readers...