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and Integrated Pest Management - part - usaid

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Table 1. Resistance of IR varieties to insect pests.a IRRI, 1986.<br />

Variety Maturity N. lugens biotype Nephoteuix Sogaiella Scirpophaga Chilo Ilydrellia Stenchaeothrips<br />

(DAS) 1 2 3 virescens furcifera incertulas suppressalis philippina biformis<br />

IR5 130 S S S MR S S S<br />

IR8 125<br />

S<br />

S S<br />

S<br />

S MR S S S<br />

BR20<br />

S<br />

121 S<br />

S<br />

S S MRd S MR R<br />

IR22 119<br />

S<br />

S S S<br />

S<br />

S S S S S S<br />

TR24 118 S S S<br />

1R26<br />

MR<br />

121<br />

S<br />

R<br />

S<br />

S<br />

S<br />

R<br />

S<br />

MR<br />

S<br />

S<br />

0<br />

S MR S<br />

IR28<br />

S<br />

104 R<br />

0<br />

S R R S S S<br />

IR29 112<br />

S<br />

R S<br />

S<br />

R R S S<br />

1R30<br />

S<br />

105 R<br />

S<br />

S R<br />

S<br />

R S<br />

S MR<br />

IR32<br />

S<br />

130<br />

S<br />

R R MR MR S S<br />

IR34<br />

MR<br />

122<br />

S<br />

R S R<br />

S<br />

R S S MR<br />

IR36<br />

S<br />

110 R<br />

S<br />

R MRc MR S MR R<br />

IR38 123<br />

S<br />

R R<br />

S<br />

MR MR S S MR<br />

IR40<br />

S<br />

130 R<br />

S<br />

MR S MR S MR<br />

IR42<br />

R<br />

132 R<br />

MR<br />

R S<br />

S<br />

MR S S MR<br />

IR43<br />

S<br />

120 S<br />

S<br />

S S MR S S MR<br />

IR44<br />

S<br />

123 R<br />

S<br />

R MRc MR S S R<br />

IR45<br />

S<br />

120 R<br />

S<br />

S R MR S S S<br />

1R46<br />

S<br />

112 R<br />

S<br />

Sb R d<br />

MR S S S<br />

IR48<br />

S<br />

127<br />

S<br />

R R S MR MR S S<br />

IR50 S<br />

107 R<br />

S<br />

MR RC R S<br />

MR R<br />

IR52<br />

S<br />

117 R<br />

S<br />

R MR R MR S MR<br />

1R54 120 R<br />

S<br />

R S R<br />

S<br />

IR56 106 R R R<br />

S<br />

R<br />

MR<br />

S<br />

MR<br />

S S .-

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