Central Rice Research Institute Annual report...2011-12

Developing IPM Technologies for Different Rice Ecologies
Table 38. Population of the paddy moth collected in different traps
Date Trap 1 Trap 2 Trap 3 Trap 4 Trap 5 Trap 6 Trap 7 Total Catch*
07/08/2011 136 102 76 93 107 112 84 710
08/08/2011 121 97 71 87 99 103 77 655
09/08/2011 113 88 66 82 87 95 71 602
10/08/2011 102 71 63 76 81 84 69 546
11/08/2011 86 63 57 69 76 76 63 490
14/08/2011 73 56 51 61 67 61 52 421
15/08/2011 67 48 43 57 61 57 47 380
16/08/2011 61 32 37 48 56 48 43 325
17/08/2011 49 24 31 42 43 41 39 269
18/08/2011 43 19 31 37 37 39 33 239
21/08/2011 37 16 24 31 29 33 28 198
22/08/2011 34 16 19 24 23 27 24 167
23/08/2011 29 13 16 21 19 22 19 139
24/08/2011 21 09 11 18 13 17 13 102
25/08/2011 13 03 07 10 09 09 07 58
27/08/2011 09 01 03 03 02 03 04 25
Total catch ** 993 658 604 759 809 827 673 5306
*- Date-wise total catch, **-Trap-wise total catch
Eight botanical oils viz., Til (Sesamum indicum L.),
Karanja (Pongamia glabra Vent.), Bael (Aegle marmelos
Corr.), Castor (Ricinus communis L.), Citronella
(Cymbopogon citratus DC. Stapf.), Crown oil (resin of
Shorea robusta Roth.), Mustard (Brassica campestris L.)
and Groundnut (Arachys hypogea L.) were extracted using
Clevenger oil extraction apparatus and tested
against paddy moth, Sitotroga cerealella under controlled
conditions on variety Ratna. The oil of citronella and
crown oil could effectively protect the stored paddy from
this pest for six months (Table 39).
Management of root-knot nematode using
botanicals
Leaves of 50 plants were tested against rice rootknot
nematode @ 5 and 10 t ha -1 . These were incorporated in
to soil in pot culture experiment. Number of galls per
gram of root was counted to compute the gall index.
Based on the gall index the plants were categorized to
highly effective, effective and ineffective. Argimone
mexicana L., Calotropis procera Aitan, Tamarindus indica
L. and Strychnos nux vomica L. were found to be highly
effective. In the nematode infected fields fresh leaves of
Table 39. Evaluation of botanical oils against paddy moth Sitotroga cerealella
Moth population Moth population Moth population
Treatment 45 DAR 90 DAR 180 DAR
Til 169.5 (13.03) 710 (27.75) 2010 (44.83)
Karanja 54.50 (07.41) 240 (15.50) 650 (25.50)
Bael 79.50 (08.94) 326 (18.06) 870 (29.50)
Castor 110.5 (10.51) 450 (21.22) 1170 (34.21)
Citronella 20.50 (04.58) 93 (09.66) 201 (14.19)
Crown 22.00 (04.74) 110 (10.51) 316 (17.79)
Groundnut 163.50 (12.78) 723 (26.89) 1650 (40.62)
Mustard 160.50 (12.64) 650 (25.50) 1390 (37.28)
Control 220 (14.84) 880 (29.67) 2800 (52.91)
SD at 5% 4.67 7.98 11.73
DAR= days after release; Initial grain moisture-16%
Data in parenthesis are “X+0.5 transformation of original value
Dose @ 0.5%v/w; Initial release 5 pairs of moths
CRRI ANNUAL REPORT 2011-12
87