ORIGINAL ARTICLE
Seasonal incidence of mite and infuence of pesticidal application on orchid flower production
 
More details
Hide details
1
National Research Centre for Orchids (ICAR) Pakyong-737 106, Sikkim, India
2
National Research Centre for Orchids (ICAR) Darjeeling campus, Darjeeling-734101, West Bengal, India
CORRESPONDING AUTHOR
Narottam Kumar Meena
National Research Centre for Orchids (ICAR) Pakyong-737 106, Sikkim, India
Submission date: 2012-10-19
Acceptance date: 2013-03-19
 
Journal of Plant Protection Research 2013;53(2):124–127
KEYWORDS
TOPICS
ABSTRACT
Investigations were carried out in 2010 to determine the influence of abiotic factors on the incidence of the two spotted spider mite; Tetranychus urticae Koch and to determine the influence of pesticides on orchid flower production. Initially, in January, the mite population was very low (1.0 mite/10 cm 2 leaf area). The population gradually increased and peaked to 22.98 mites/10 cm 2 leaf area in the first fortnight of May along with the rise in temperature and sunshine. Then, the population declined to a low level of 3.43 mites/10 cm 2 leaf area in the first fortnight of December. Maximum and minimum temperatures had a significant positive correlation and sunshine had a non-significant positive correlation, whereas relative humidity and rainfall had a non-significant negative correlation with the mite population. Infestation of the two spotted spider mite was more severe in untreated conditions in comparison to the treated ones. The difference was due to various abiotic factors and natural pest infestation occurrence which drastically affected the flower quality and yield. In unprotected conditions, the number of flower spikes/plant (1.90±0.44 spikes), number of flowers/spike (7.35±1.04 flowers), spike length (42.59±5.69 cm), flower spike diameter (5.26±0.66 mm), and flower size (6.27±0.86 cm) was very low. In protected conditions, flower quality and yield were superior than in unprotected conditions i.e. number of flower spike/plant (2.92±0.57 spikes), number of flowers/spike (11.78±1.16 flowers), spike length (57.59±7.35 cm), diameter of flower spikes (9.09±1.01 mm), and flower size (6.73±1.16 cm).
CONFLICT OF INTEREST
The authors have declared that no conflict of interests exist.
 
REFERENCES (13)
1.
Batchelor S.R. 1982. Orchid culture – 13 Pests. Part 1. Am. Orchid Soc. Bull. 51: 237–241.
 
2.
Karmakar K., Dey S. 2006. Studies on seasonal incidence of phytophagous mite species on selected germplasms of banana in west Bengal. Indian J. Crop Sci. 1 (1–2): 138–139.
 
3.
Kuehnle A.R. 2007. Orchids, Dendrobium. p. 539–560. In: “Flower Breeding and Genetics” (N.O Anderson, ed.). Springer, 848 pp.
 
4.
Mahato S., Kundu S.S., Somchoudhury A.K., Sarkar P.K. 2008. Damage of two spotted spider mite, Tetranychus urticae Koch (Acari: Tetranychidae) in marigold and their management with bio-rationals: west Bengal perspective. J. Ent. Res. 32 (1): 31–34.
 
5.
Mashue, Wang-Jlahong, Xu-Chunron, Ma-se, Wang J.H., Xu C.R. 1998. The occurrence of the spotted spider mite and its control. China Fruits 2: 34–36.
 
6.
Nagaraju V., Upadhyaya R.C., Barman D., Nagrare V.S., Bag T.K., Sarkar J. 2006. Orchids in north eastern states. Tech. Bull.: 2–3.
 
7.
Naher N., Islam M.W., Khalequzzaman M., Haque M.M. 2008. Study on the developmental stages of spider mite, Tetranychus urticae Koch infesting bean. J. Bio-Sci. 16: 109–114.
 
8.
Natarajan N. 2001. Screening of Amaranthus germplasms against Tetranychid mites. Proc. CAS training on biodiversity of phytophagous mite and recent advances in their management, 185 pp.
 
9.
Pritchard A.E. 1959. Orchid pests and their control. p. 460–471. In: “The Orchids – A Scientific Survey” (C.L. Withner, ed.). Wiley, New York, 648 pp.
 
10.
Rajakumar E., Hugar P.S., Kattimani K.N. 2005. Seasonal incidence of red spider mite, Tetranychus urticae Koch (Acari: Tetranychidae) on jasmine. Karnataka J. Agric. Sci. 18 (1): 150–153.
 
11.
Satish Kumar C., Manilal K.S. 1994. A Catalogue of Indian Orchids. Bishen Singh and Mahendra Pal Singh Publisher, Deharadun, India, 162 pp.
 
12.
Stanyard J.M., Foster R.E., Gibb T.J. 1997. Effect of orchard ground cover and mite management on the population dynamics of European red mite (Acari: Tetranychidae) and Amblyseius fallacies (Acari: Phytoseiidae) in apple. J. Econ. Entomol. 90 (2): 295–303.
 
13.
Tuttle D.M., Baker E.W. 1968. Spider Mites of Southern United States and a Revision of the Family Tetranychidae. Univ. Arizona Press. Tuscon, Arizona, 143 pp.
 
eISSN:1899-007X
ISSN:1427-4345