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Chilean Journal of Agricultural Research
Instituto de Investigaciones Agropecuarias, INIA
ISSN: 0718-5820
EISSN: 0718-5839
Vol. 73, No. 3, 2013, pp. 309-314
Bioline Code: cj13044
Full paper language: English
Document type: Note
Document available free of charge

Chilean Journal of Agricultural Research, Vol. 73, No. 3, 2013, pp. 309-314

 en Biology of the tea mosquito bug ( Helopeltis theivora check for this species in other resources Waterhouse) on Chromolaena odorata check for this species in other resources (L.) R.M. King & H. Rob.
Srikumar, K.K. & Shivarama Bhat, P.

Abstract

Helopeltis theivora check for this species in other resources Waterhouse, pest of tea, is emerging as a commonly occurring major pest of cashew ( Anacardium occidentale check for this species in other resources L.) in recent times. The field observation revealed Chromolaena odorata check for this species in other resources (L.) R.M. King & H. Rob. weed support as an alternate host of this pest during off season of cashew. Biology of H. theivora on this weed was studied for the first time. The incubation period of eggs was 10.5 ± 1.2 d. The 1st, 2nd, 3rd, 4th and 5th nymphal instar developmental times were 36.11 ± 9.52, 43.29 ± 7.35, 27.15 ± 8.41, 41.31 ± 10.13, and 73.91 ± 5.67 h, respectively. Survival percentage of eggs was lower (60.53%) than nymphal instars. Adult females and males lived for 22.6 ± 3.29 and 11.8 ± 1.64 d, respectively. Females showed dynamic patterns of fecundity with the number of eggs laid per female ranging 19 to 34. Longevity and fecundity of H. theivora on this weed were significantly lesser when compared on cashew. Egg parasitoids viz., Telenomus check for this species in other resources sp., Chaetostricha check for this species in other resources sp. and Erythmelus helopeltidis check for this species in other resources Gahan were recorded from H. theivora eggs on C. odorata for the first time. For better management decisions, it is important to know about this mirid biology, particularly their life cycle on their alternate hosts so that the right assessment can be made before taking up spray.

Keywords
Biological parameters; Chromolaena odorata; egg parasitoids cashew; Helopeltis theivora

 
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