International Journal of Tropical Insect Science

, Volume 2, Issue 3, pp 129–133 | Cite as

Pigment Migration in the Eye of Myndus Crudus (Homoptera: Cixiidae) and its Relationship to day and Night Activity

  • F. W. Howard


When the compound eye of the adult of the planthopper, Myndus crudus, is light-adapted, pigments are condensed in a zone proximal to the crystalline cones. Viewed externally, the eye is straw-colored. When dark-adapted, pigments migrate distally into the region of the crystalline cones and thus are closer to the cuticle. Viewed externally, the dark-adapted eye is maroon-colored. The eyes of most adult M. crudus observed during daylight hours were light-adapted. Eyes of males and females changed from the light to the dark-adapted condition between sunset and ½hr after sunset. When planthoppers with light-adapted eyes were placed abruptly into darkness at a temperature of 25–27°C, the eyes became dark-adapted within 15–30 min. When planthoppers with dark-adapted eyes were placed abruptly into light, the eyes became light-adapted within 30–60 min. At 8°C the planthoppers were immobile, and light-adapted eyes had not changed to the dark-adapted condition within 45 min. Eyes of M. crudus nymphs, which live in the root zones of grasses, are dark red and do not change color in response to changes in light. Field samples showed that adult M. crudus were active in coconut palms during the day and night, but higher numbers were caught during the day (P < 0.01).

Key Words

Myndus Haplaxius planthopper Homoptera vector coconut lethal yellowing Cocos compound eyes 


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  1. Agee H. R. (1971) Histology of the compound eye of Heliothis zea. Ann. ent. Soc. Am. 64: 85–88.CrossRefGoogle Scholar
  2. Collins D. L. (1934) Iris pigment migration and its relation to behavior in the coddling moth. J. exp. Zool. 69: 165–198.CrossRefGoogle Scholar
  3. Day M. F. (1941) Pigment migration in the eyes of the moth Ephestia kuehniella Zeller. Biol. Bull. mar. biol. Lab., Woods Hole 80: 275–291.CrossRefGoogle Scholar
  4. Eden-Green S. J. (1978) Rearing and transmission techniques for Haplaxius sp. (Hompotera: Cixiidae), a suspected vector of lethal yellowing of coconuts. Ann. appl. Biol. 89: 173–176.CrossRefGoogle Scholar
  5. Fisher J. and Tsai J. H. (1977) Feeding sites of leafhoppers and planthoppers on plant tissues. Proceedings of 3rd Meeting of International Council on Lethal Yellowing. University of Florida, Agricultural Research Center, Fort Lauderdale, Publication FL-78-2.Google Scholar
  6. Howard F. W. and Mead F. W. (1980) A survey of Auche-norrhyncha (Insecta: Homoptera) associated with palms in southern Florida. Trop. Agric., Trin. 57: 145–153.Google Scholar
  7. Howard F. W. and Thomas D. L. (1980) Transmission of palm lethal decline to Veitchia merrillii by the planthopper, Myndus crudus. J. econ. Ent. 73, 715–717.CrossRefGoogle Scholar
  8. Kramer J. P. (1979) Taxonomic study of the planthopper genus Myndus in the Americas (Homoptera: Fulgoroidea: Cixiidae). Trans. Am. ent. Soc. 105: 301–389.Google Scholar
  9. Land M. F. (1980) Compound eyes: old and new mechanisms. Nature, Lond. 287: 681–686.CrossRefGoogle Scholar
  10. Reinert J. A. (1980) Phenology and density of Haplaxius crudus (Homoptera: Cixiidae) on three southern turfgrasses. Envir. Ent. 9, 13–15.CrossRefGoogle Scholar
  11. Sass J. E. (1958) Botanical Microtechnique. Iowa State University Press, Ames, Iowa.Google Scholar
  12. Snodgrass R. E. (1935) Principles of Insect Morphology. McGraw-Hill, New York.Google Scholar
  13. Tsai J. H. and Kirsch O. H. (1978) Bionomics of Haplaxius crudus (Homoptera: Cixiidae). Envir. Ent. 7: 305–308.CrossRefGoogle Scholar
  14. Uchida H. (1934) Color changes in the eye of a long-horned grasshopper, Homorococoryphus lineosus, in relation to light. Tokyo Univ. Fac. Sci. J. 3: 517–525.Google Scholar
  15. Walcott B. (1975) Anatomical changes during light-adaptation in insect compound eyes. In The Compound Eye and Vision of Insects (Ed. by Horridge G. A.), pp. 20–33. Clarendon Press, Oxford.Google Scholar
  16. Waters H. (1976) Feeding behavior of a putative vector of lethal yellowing, Haplaxius crudus Van Duzee (Homoptera: Cixiidae). Principes 20: 57–69.Google Scholar

Copyright information

© ICIPE 1981

Authors and Affiliations

  • F. W. Howard
    • 1
  1. 1.University of Florida, Agricultural Research CenterFort LauderdaleUSA

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