|
in
| Title : |
Evaluation of different pesticides for the management of rice stem borers |
| Material Type: |
printed text |
| Authors: |
G.S Bhandari, Editor ; B. Chaudhary ; B Sapkota, Author ; D.N Mahato, Author ; S.K Upadhyaya, Author |
| Pagination: |
304-309 p. |
| Keywords: |
Botanical pesticide ; dead heart pesticides stem borer white ear |
| Abstract: |
Rice Stem Borers have been recognized as the national pest of Rice in Nepal. Past studies
have estimated about 40% of total loss in Rice is due to Rice Stem Borer. An experiment
was conducted at Regional Agricultural Research Station, Tarahara during rice growing
season of 2011 and 2012 with the objective of evaluating differential efficacy of different
pesticides combinations against Rice Stem Borers. The experiment had 12 different
pesticides combinations laid out in a Complete Block Design with three replications.
Responses were recorded on count of dead hearts, count of white heads and grain yield to
compare the treatments. The effect of treatments on count of dead hearts was found highly
significant. Number of dead hearts was the least on Seedling Root Dipping with
chJorpyrifos 20% EC @ 2 milL of Water+ three sprays of imidacloprid 17.8% SL@ 1
ml/2L of water 30, 40 and SO days after transplanting (DAT) followed by Seedling Root
Dipping with chlorpyrifos 20% EC@ 2 milL of Water+ three sprays of Lantana camera
Extract @ S% solution 30, 40 and SO DA T and Root Dipping with chlorpyrifos 20% EC @
2 milL of water + Urea 20 gm IL of water for 3 hours + Lantana camera @ S% solution at
30, 40 and 50 OAT. The effect of treatments for count of white ears was also highly
significant. The Seedling Root Dipping with chlorpyrifos 20% EC @ 2 mi/L of Water+
three sprays ofimidacloprid 17.8% SL@ 1 mi/2L ofwater 30,40 and 50 DAT recorded the
lowest count of white ears followed by Root Dipping with chlorpyrifos 20% EC @ 2 milL
of Water + three sprays of Sweet Flag Stolen Extract @ 5% solution 30, 40 and 50 DA T
and Root Dipping with chlorpyrifos 20% EC @ 2 milL of Water + Lantana camera extract
@ 5% solution Spray 30, 40 and 50 DAT. The variation on grain yield was significant due
to the treatments. The highest grain yield was obtained from Root Dipping with
chlorpyrifos 20% EC @ 2 mVL of Water and Urea 20 g /L for 3 hours + three sprays of
imidacloprid 17.8% SL @ 1 ml/2L of water at 30,40 and 50 DAT followed by Root
Dipping with chloropyrifos and Urea 20 g /L for 3 hours + three sprays of Sweet Flag @
5% solution and Root Dipping with chlorpyrifos 20% EC @ 2 ml/L of Water+ three
sprays of Lantana camera Extract. All the treatments combinations were significantly
superior to the control and the standard check (carbofuran 3G) for all parameters
considered. This study concluded that application of botanical pesticides in combination
with chemical pesticides is effective for managing rice stem borer. |
| Link for e-copy: |
http://elibrary.narc.gov.np/?r=958 |
in
Evaluation of different pesticides for the management of rice stem borers [printed text] / G.S Bhandari, Editor ; B. Chaudhary ; B Sapkota, Author ; D.N Mahato, Author ; S.K Upadhyaya, Author . - [s.d.] . - 304-309 p. | Keywords: |
Botanical pesticide ; dead heart pesticides stem borer white ear |
| Abstract: |
Rice Stem Borers have been recognized as the national pest of Rice in Nepal. Past studies
have estimated about 40% of total loss in Rice is due to Rice Stem Borer. An experiment
was conducted at Regional Agricultural Research Station, Tarahara during rice growing
season of 2011 and 2012 with the objective of evaluating differential efficacy of different
pesticides combinations against Rice Stem Borers. The experiment had 12 different
pesticides combinations laid out in a Complete Block Design with three replications.
Responses were recorded on count of dead hearts, count of white heads and grain yield to
compare the treatments. The effect of treatments on count of dead hearts was found highly
significant. Number of dead hearts was the least on Seedling Root Dipping with
chJorpyrifos 20% EC @ 2 milL of Water+ three sprays of imidacloprid 17.8% SL@ 1
ml/2L of water 30, 40 and SO days after transplanting (DAT) followed by Seedling Root
Dipping with chlorpyrifos 20% EC@ 2 milL of Water+ three sprays of Lantana camera
Extract @ S% solution 30, 40 and SO DA T and Root Dipping with chlorpyrifos 20% EC @
2 milL of water + Urea 20 gm IL of water for 3 hours + Lantana camera @ S% solution at
30, 40 and 50 OAT. The effect of treatments for count of white ears was also highly
significant. The Seedling Root Dipping with chlorpyrifos 20% EC @ 2 mi/L of Water+
three sprays ofimidacloprid 17.8% SL@ 1 mi/2L ofwater 30,40 and 50 DAT recorded the
lowest count of white ears followed by Root Dipping with chlorpyrifos 20% EC @ 2 milL
of Water + three sprays of Sweet Flag Stolen Extract @ 5% solution 30, 40 and 50 DA T
and Root Dipping with chlorpyrifos 20% EC @ 2 milL of Water + Lantana camera extract
@ 5% solution Spray 30, 40 and 50 DAT. The variation on grain yield was significant due
to the treatments. The highest grain yield was obtained from Root Dipping with
chlorpyrifos 20% EC @ 2 mVL of Water and Urea 20 g /L for 3 hours + three sprays of
imidacloprid 17.8% SL @ 1 ml/2L of water at 30,40 and 50 DAT followed by Root
Dipping with chloropyrifos and Urea 20 g /L for 3 hours + three sprays of Sweet Flag @
5% solution and Root Dipping with chlorpyrifos 20% EC @ 2 ml/L of Water+ three
sprays of Lantana camera Extract. All the treatments combinations were significantly
superior to the control and the standard check (carbofuran 3G) for all parameters
considered. This study concluded that application of botanical pesticides in combination
with chemical pesticides is effective for managing rice stem borer. |
| Link for e-copy: |
http://elibrary.narc.gov.np/?r=958 |
|
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Population dynamics of insect pests of rice at RARS Tarahara: a light trap survelliance / G.S Bhandari
