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                                                                                     Table 1.1. 
           Some
examples showing the abundance of plants and animals dependent on the presence 
                            
                of one or a few
organisms in the ecosystem.
 
        
_________________________________________________________________________________________________________
      
Controlled Organisms                                              Causative Agent(s)
-- See <Detailed Cases> for discussion]
       
_________________________________________________________________________________________________________
 
| 
   Phytophagous
  Insects  | 
  
   --------------------------------------------------------  | 
 
| 
   Alfalfa
  weevil in coastal California-----------------------------  | 
  
   Bathyplectes curculionis (Thoms.)  | 
 
| 
   Apple
  mealybug in Canada----------------------------------------  | 
  
   Allotropa
  utilis Muesebeck  | 
 
| 
   Black
  scale in southern California-----------------------------  | 
  
   Metaphycus helvolus (Compere)  | 
 
| 
   Blue
  gum scale in New Zealand----------------------------------  | 
  
   Rhizobius ventralis (Erichson)  | 
 
| 
   Brown-tail
  moth in Canada----------------------------------------  | 
  
   Compsilura
  concinnata (Mg.), Apanteles lacteicolor Viereck
  & Meteorus versicolor  | 
 
| 
   California red scale in California
  & Europe------------------  | 
  
   Aphytis melinus DeBach  | 
 
| 
   Citrophilus mealybug in
  California-----------------------------  | 
  
   Coccophagus gurneyi Compere  | 
 
| 
   Citrus
  blackfly in Cuba---------------------------------------------  | 
  
   Eretmocerus
  serius Silvestri  | 
 
| 
   Citrus
  blackfly in Mexico------------------------------------------  | 
  
   Amitus
  hesperidum Silvestri, Prospaltella opulenta
  Silvestri  | 
 
| 
   Citrus
  mealybug in Israel------------------------------------------  | 
  
   Clausenia purpurea Ishii  | 
 
| 
   Coconut
  leaf mining beetle in Fiji--------------------------------  | 
  
   Pleurotropic
  parvulus Ferr.  | 
 
| 
   Coconut
  moth in Fiji-------------------------------------------------  | 
  
   Ptychomyia
  remota Aldrich  | 
 
| 
   Coconut
  scale in Fiji-------------------------------------------------  | 
  
   Cryptognatha nodiceps Mshll  | 
 
| 
   Coconut
  scale in Mauritius----------------------------------------  | 
  
   Chilocorus politus Muls. & C.
  nigritus Muls.  | 
 
| 
   Coffee
  mealybug in Kenya             -----------------------------------------  | 
  
   Anagyrus nr. kivuensis
  (Compere)  | 
 
| 
   Comstock
  mealybug in California-------------------------------  | 
  
   Allotropa
  burrelli Muesebeck & Pseudaphycus malinus Gahan  | 
 
| 
   Cottony-cushion
  scale in >50 countries------------------------  | 
  
   Rodolia cardinalis (Mulsant) &/or Cryptochaetum iceryae
  (Willis.)  | 
 
| 
   Diamond-back
  moth in New Zealand----------------------------  | 
  
   Angitia
  cerophaga (Grav.)  | 
 
| 
   Dictyospermum scale in Greece---------------------------------  | 
  
   Aphytis melinus DeBach  | 
 
| 
   Florida red scale in Israel,
  Florida, Africa, S. Amer -------  | 
  
   Aphytis
  holoxanthus DeBach  | 
 
| 
   Green vegetable bug in Australia
  & Hawaii-------------------  | 
  
   Trissolcus
  basalis (Wollaston), etc.  | 
 
| 
   Navel Orangeworm
  --------------------------------------------------  | 
  
   Goniozus legneri,
  Goniozus emigratus & Copidosomopsis plethorica Caltagirone  | 
 
| 
   Olive
  scale in California and Europe----------------------------  | 
  
   Aphytis maculicornis (Masi) & Coccophagoides utilis Doutt  | 
 
| 
   Oriental
  beetle in Saipan-------------------------------------------  | 
  
   Campsomeris annulata Fab.  | 
 
| 
   Oriental
  fruit fly in Hawaii----------------------------------------  | 
  
   Opius oophilus Fullaway  | 
 
| 
   Purple
  scale in California------------------------------------------  | 
  
   Aphytis lepidosaphes Compere  | 
 
| 
   Red
  wax scale in Japan----------------------------------------------  | 
  
   Anicetus beneficus Ishii & Yasumatsu  | 
 
| 
   Rhodesgrass
  scale in southeastern United States-----------  | 
  
   Neodusmetia
  sangwani (Rao)  | 
 
| 
   Spiny
  blackfly in Japan---------------------------------------------  | 
  
   Prospaltella
  smithi Silvestri  | 
 
| 
   Sugarcane borer in
  Barbados------------------------------------  | 
  
   Apanteles
  flavipes (Cameron)  | 
 
| 
   Sugarcane
  leafhopper in Hawaii---------------------------------  | 
  
   Cyrtorhinus mundulus (Bredd.)  | 
 
| 
   Tea tortrix in Sri
  Lanka--------------------------------------------  | 
  
   Macrocentrus homonae Nixon  | 
 
| 
   Walnut
  aphid in central California                -----------------------------  | 
  
   Trioxys sp. from Iran  | 
 
| 
   Walnut
  aphid in southern California---------------------------  | 
  
   Trioxys pallidus Haliday from France  | 
 
| 
   Winter
  moth in Canada--------------------------------------------  | 
  
   Cyzenis albicans (Fall.) & Agrypon flaveolatus (Grav.)  | 
 
| 
   Winter
  moth in England-------------------------------------------  | 
  
   Small
  rodents (feeding on overwintering pupae)  | 
 
| 
   Woolly
  apple aphid in New Zealand-----------------------------  | 
  
   Aphelinus mali (Hald.)  | 
 
| 
      | 
  
      | 
 
| 
   Terrestrial
  Plants  | 
  
   ---------------------------------------------------------  | 
 
| 
   American
  chestnut in eastern North America---------------  | 
  
   Endothia
  parasitica (Murr.)  | 
 
| 
   American
  elms in eastern North America--------------------  | 
  
   Scolytus multistriatus (Marsham) vectoring Ceratocystis ulmi (Buisman)
  C. Moreau  | 
 
| 
   Apple
  trees in Europe-----------------------------------------------  | 
  
   Prospaltella perniciosi Tow attacking San Jose Scale  | 
 
| 
   Endemic
  cedars in Bermuda--------------------------------------  | 
  
   Carulaspis visci (Schrank) & Lepidosaphes newsteadi (Sulc.)  | 
 
| 
   Eucalyptus
  at <500 meters in South Africa-------------------  | 
  
   Patasson nitens (Girault) attacking eucalyptus snout beetle  | 
 
| 
   Eucalyptus
  at >500 meters in South Africa-------------------  | 
  
   Patasson nitens, but at a higher density  | 
 
| 
   Klamath
  weed in northwestern United States-----------------  | 
  
   Chrysolina
  hyperici (Forster) & C. quadrigemina
  (Suffrian)  | 
 
| 
   Opuntia cactus in
  Australia---------------------------------------  | 
  
   Cactoblastis cactorum (Berg)  | 
 
| 
   Opuntia cactus in Sri Lanka--------------------------------------  | 
  
   Dactylopius indicus
  Green  | 
 
| 
   Opuntia cactus on Santa Cruz Island, Calif.------------------  | 
  
   Dactylopius sp.  | 
 
| 
   Puncturevine
  in coastal California               -----------------------------  | 
  
   Microlarinus lypriformis (Woll.)  | 
 
| 
      | 
  
      | 
 
| 
   Aquatic
  Plants  | 
  
   ---------------------------------------------------------  | 
 
| 
   Eichornia in
  Florida-------------------------------------------------  | 
  
   Neochetina bruchi  | 
 
| 
   Potamogeton the Imperial Valley, California----------------  | 
  
   Tilapia zillii (Gervais)  | 
 
| 
      | 
  
      | 
 
| 
   Medical
  & Veterinary Pests  | 
  
   ---------------------------------------------------------  | 
 
| 
   Black
  stable fly in Mauritius--------------------------------------  | 
  
   Tachinaephagus stomoxcida Subba-Rao  | 
 
| 
   Chironomid
  midges in L.A drainage channels---------------  | 
  
   Oreochromis hornorum Trewazas & O. mossambica (Peters)  | 
 
| 
   Common
  housefly in S. Africa & New Zealand--------------  | 
  
   Tachinaephagus zealandicus Ashmead  | 
 
| 
   Culex mosquitoes in California irrigation
  drains-----------  | 
  
   Gambusia & Cyprinodon
  spp.  | 
 
| 
   Culex mosquitoes in California rice
  fields--------------------  | 
  
   Mesostoma flatworms  | 
 
| 
   Housefly
  and stable fly in Puerto Rico--------------------------  | 
  
   Spalangia nigroaenea Curtis, S.
  cameroni Perkins & S. endius   Walker  | 
 
| 
      | 
  
      | 
 
| 
   Vertebrates  | 
  
   ---------------------------------------------------------  | 
 
| 
   European
  rabbits in Australia-------------------------------------  | 
  
   Myxomytosis virus #1  | 
 
| 
   European
  rabbits in England---------------------------------------  | 
  
   Myxomytosis virus #2  | 
 
| 
      | 
  
      |