Pak. J. Bot., 37(2): 319-324, 2005. | Back to Contents | ||||
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Updated: 09-07-09 | ||||
RESISTANCE OF DIFFERENT BASMATI RICE VARIETIES TO STEM BORERS UNDER DIFFERENT CONTROL TACTICS OF IPM AND EVALUATION OF YIELD RASHID A. KHAN, JUNAID A. KHAN, F. F. JAMIL AND M. HAMED
Abstract:
Studies were conducted using five Basmati rice varieties to evaluate
the chemical, biological control of rice stem borers and their infestation
under natural conditions. The results revealed that rice stem borer
infestation varied significantly among different Basmati varieties under
chemical, biological and natural environmental conditions. In chemical
control trial two chemicals viz., Lorsban 40 EC and Karate 2.5 EC were
used at vegetative and panicle formation stage respectively in recommended
doses. Results revealed that among varieties Basmati Super showed minimum
infestation and Basmati 370 showed maximum infestation under chemical
control. Biological control trial showed that Basmati Super had minimum
infestation whereas other varieties showed same level of infestation.
Yield analysis showed significant yield increase under chemical control
over biological control. The varieties under natural conditions were
ranked as Basmati Super > Basmati 2000 > Basmati 385 > Basmati
Pak > Basmati 370. These results emphasized the need to carefully
integrate the chemical and biological control tactics of IPM for rice
Plant Protection Division, Nuclear Institute for Agriculture and Biology (NIAB), P.O. Box No. 128, Jhang Road, Faisalabad, Pakistan. |
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