eprintid: 7524
rev_number: 10
eprint_status: archive
userid: 329
dir: disk0/00/00/75/24
datestamp: 2014-02-14 09:35:48
lastmod: 2014-02-14 09:35:48
status_changed: 2014-02-14 09:35:48
type: article
metadata_visibility: show
contact_email: Library-ICRISAT@CGIAR.ORG
creators_name: Sharma, H C
creators_name: Lopez, V F
icrisatcreators_name: Sharma, H C
icrisatcreators_name: Lopez, V F
affiliation: ICRISAT(Patancheru)
country: India
title: Biology and population dynamics of sorghum head bugs (Hemiptera: Miridae)
ispublished: pub
subjects: s1.4
subjects: s2.15
subjects: s2.7
full_text_status: restricted
keywords: Calocoris angustatus; Creontiades pallidus; Eurystylus bellevoyei; Campylomma; Biology; Population dynamics; Erythemelus helopeltidis; Parasitoid
abstract: Four mirid head bugs, Calocoris angustatus Leth., Creontiades pallidus Ramb., Eurystylus bellevoyei Put. and Reut., and Campylomma sp., infest sorghum at ICRISAT Centre in India. C. angustatus is the predominant species, followed by Campylomma sp., C. pallidus and E. bellevoyei. The incidence of C. angustatus is higher in crops grown on Vertisols than on Alfisols, and maximum numbers are recorded in panicles at the milk stage. Females of C. angustatus lay eggs inside the glumes before anthesis, whereas the other species insert their eggs in the grain at the milk stage. The life cycle is completed in 15–20, 17–23, 14–16 and 16–17 days by C. angustatus, C. pallidus, E. bellevoyei, and Campylomma sp., respectively. The maximum numbers of C. angustatus, C. pallidus and E. bellevoyei were recorded during September–October, whereas Campylomma sp. tended to be most active during March–June. Lower minimum temperature (<18°C) and relative humidity (r.h.) (<30%) were associated with a decline in C. angustatus density during November–January, while higher temperatures (>32°C) and lower r.h. (<30%) restricted its numbers during March–June. During the rainy season, rainfall, temperature and r.h. were generally positively associated with populations of C. angustatus, C. pallidus and E. bellevoyei. However, there were some exceptions in some years. During the post-rainy season, higher temperatures (>32°C) and moisture deficit had a negative association with numbers of C. angustatus, C. pallidus and E. bellevoyei. However, these factors were positively associated with numbers of Campylomma. Weather parameter means for the same week and two preceding weeks showed a greater effect on C. angustatus populations.
date: 1990
date_type: published
publication: Crop Protection
volume: 9
number: 3
publisher: Elsevier
pagerange: 164-173
refereed: TRUE
issn: 0261-2194
official_url: http://dx.doi.org/10.1016/0261-2194(90)90158-4
related_url_url: http://scholar.google.co.in/scholar?as_q=Biology+and+population+dynamics+of+sorghum+head+bugs+%28Hemiptera%3A+Miridae%29&as_epq=&as_oq=&as_eq=&as_occt=title&as_sauthors=&as_publication=&as_ylo=&as_yhi=&btnG=&hl=en&as_sdt=0%2C5
related_url_type: pub
citation:   Sharma, H C and Lopez, V F  (1990) Biology and population dynamics of sorghum head bugs (Hemiptera: Miridae).  Crop Protection, 9 (3).  pp. 164-173.  ISSN 0261-2194     
document_url: http://oar.icrisat.org/7524/1/Crop_Protect_9_3_164-173_1990.pdf