Journal of Biological Control

Open Access Open Access  Restricted Access Subscription Access

Natural Epizootics of Cladosporium cladosporioides on Tetranychus urticae Koch. (Acari.: Tetranychidae) in Coimbatore


Affiliations
1 Department of Agricultural Entomology, Tamil Nadu Agricultural University, Coimbatore 641 039, Tamil Nadu, India
 

Investigations on the natural epizootics of Cladosporium cladosporioides (Fresenius) de vries were carried out on Okra grown at Tamil Nadu Agricultural University, Coimbatore during 2010 and 2011. Observations on the incidence of mycosed mites were monitored continuously on okra at weekly interval during the study period. Occurrence of mycosis on Tetranychus urticae Koch due to C. cladsoporioides was high during third week of August 2010 (67.58%) followed by first week of August 2011 (47.24%), respectively. Fungal infection on mites had significant positive correlation with relative humidity and negative correlation with sunshine hours during the study period. An epizootic incidence of Cladosporium cladosporioides recorded on T. urticae is the first report from Coimbatore, Tamil Nadu.

Keywords

Epizootics, Cladosporium cladosporioides, Tetranychus urticae, Okra, Weather Factors.
User
Notifications

  • Bakey ANF. 2000. Cladosporium sp. an entomopathogenic fungus for controlling white flies and aphids in Egypt. Pak J Biol Sci. 3: 1662–1667.

  • Carrurhers RI, Ramos ME, Larkin TS, Hostetter DL, Soper RS. 1997. The Entomophaga grylli (Fresenius) Batko species complex: its biology, ecology and use for biological control of grass hopper. Mem Entomol Soc Canada 171: 329–353.

  • Chandler D, Davidson G, Pell JK, Ball BV, Shaw K, Underland KD. 2000. Fungal biocontrol of Acari. Biocontrol Sci Tech. 16: 357–384.

  • Farias ARN, Filho HPS. 1987. Ocorrencia de Cladosporium spp. infectando a masca branca Aleurothrrixus aepim (Goeldi, 1886) em mandioca no Estado da Bahia. Revita Brasilea de Mandioca 6: 79–80.

  • Ganga Visalakshy PN, Mani M, Krishnamoorthy A, Gopalakrishna Pillai K. 2010. Epizootics of Entomophthora sp. on mango inflorescence hopper, Idioscopus nitidulus (Walker). J Biol Control 24 (3): 274–275.

  • Hajeck AE, St Leger RJ. 1994. Interactions between fungal pathogens and insect hosts. Ann Rev Ent. 39: 293– 322.

  • Humber RA, De Moraes GJ, Dos Santos. JM. 1981. Natural infection of Tetranychus in northeastern Brazil. Entomophaga 26: 421–425.

  • Jeyarani S, Gulsarbanu J, Ramaraju K. 2011. First record of natural occurrence of Cladosporium cladosporioides (Fresisenius) de veries and Beauveria bassiana (Bals.-Criv.) Vuill on two spotted spider mite, Tetranychus urticae Koch from India. J Entomol. 8(3): 274–279.

  • Lacey LA, Frutos R, Kaya HK, Vail P. 2001. Insect pathogens as biological control agents: Do they have a future? Biol Control 21(3): 230–248.

  • Ramegowda GK, Patil RK, Lingappa S, Kulkarni S. 2010. Studies on epizootiology and aerobiology of Nomuraea rileyi (Farlow) Samson. Int J Sci Nature 1(2): 226–235.

  • Srinivasa N, Sugeetha J. 1999. Bio effectiveness of certain botanicals and synthetic pesticides against okra spider mite, Tetranychus macfarlanei. J Acarol. 15: 1–5.

  • Steinhaus EA. 1949. Principles of Insect Pathology, McGraw Hill Book Co., New York, USA.


Abstract Views: 273

PDF Views: 153




  • Natural Epizootics of Cladosporium cladosporioides on Tetranychus urticae Koch. (Acari.: Tetranychidae) in Coimbatore

Abstract Views: 273  |  PDF Views: 153

Authors

S. Saranya
Department of Agricultural Entomology, Tamil Nadu Agricultural University, Coimbatore 641 039, Tamil Nadu, India
K. Ramaraju
Department of Agricultural Entomology, Tamil Nadu Agricultural University, Coimbatore 641 039, Tamil Nadu, India
S. Jeyarani
Department of Agricultural Entomology, Tamil Nadu Agricultural University, Coimbatore 641 039, Tamil Nadu, India
S. Sheeba Joyce Roseleen
Department of Agricultural Entomology, Tamil Nadu Agricultural University, Coimbatore 641 039, Tamil Nadu, India

Abstract


Investigations on the natural epizootics of Cladosporium cladosporioides (Fresenius) de vries were carried out on Okra grown at Tamil Nadu Agricultural University, Coimbatore during 2010 and 2011. Observations on the incidence of mycosed mites were monitored continuously on okra at weekly interval during the study period. Occurrence of mycosis on Tetranychus urticae Koch due to C. cladsoporioides was high during third week of August 2010 (67.58%) followed by first week of August 2011 (47.24%), respectively. Fungal infection on mites had significant positive correlation with relative humidity and negative correlation with sunshine hours during the study period. An epizootic incidence of Cladosporium cladosporioides recorded on T. urticae is the first report from Coimbatore, Tamil Nadu.

Keywords


Epizootics, Cladosporium cladosporioides, Tetranychus urticae, Okra, Weather Factors.

References