and Integrated Pest Management - part - usaid

APPENDIX I continued
Pest Sampling Thresholda Growth Remarks
technique stage
5.2.2 Narrow brown leaf count number of 45(30) infected leaves/SU 4-7
spot (NBS) infected leaves
5 2.3 Cercosporaoryzae
Leaf blast (BLA)
Pyriculariaoryzae
count number of
infected leaves
5.2.4 Neck and node count number of
(10) infected leaves/SU 1 only count leaves
with typical blast
lesions
seedbed/seedling
20(15) infected leaves/SU
0.8(0.5) infected tillers/SU
blast (NBL) infected tillers
5.2.5 Pyriculariaoryzae
Stem rot (RSR) count number of 0.8(0.5) infected tillers/SU 6-7 only count
ilelminthosporium
sigmoideum
infected tillers panicle-bearing
tillers
5.2.6
5.2.7
Sheath rot (SHR) count number of 1.5(1) infected tillers/SU 2-6
Sarocladitnoryzae
Bakanae (BAK)
Gibberellafiijikuroi
infected tillers
count number of
infected tillers
not yet available; count number
of abnormal tillers/SU
1-2 pull infected plant
out; seed t-eatment
5.2.8 Sheath blight (SHB)
Rhizoctonia solani
count number of
infected tillers
4(2.5) infected tillers 3-7
in the following
season is necessary
seed treatment in
the followilig
season is necessary
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