and Integrated Pest Management - part - usaid

Table 1. Economic thresholds used, and solutions chosen for each rice pest, wet season, 1986/87.
Pest
Hoppers
Lcaffoldcr
Whorl maggot
Gall midge
Stemborer
Black bug
Rice bLg
Low threshold
5/hill
5% folded leaves
20% damaged leaves
1% onion shoots
5% dead hearts
or
1 egg mass/15 hills
4/hill
1/15 hills
high threshold
20/hill
15% folded leaves
50% damaged leaves
5% onion shoots
15% dead hearts
or
1 egg mass/5 hills
12/hill
1/5 hills
Solution
Furathiocarb EC
300 g a.i./ha
Monocrotophos SCW
400 g a.i./ha
Monocrotophos SCW
400 g a.i./ha
Isazofos G >
300 g a.i./ha q
Isazofos G
300 g a.i./ha>
Monocrotophos SCW
400 g a.i./ha
Monocrotophos SCW
400 a a.i./ha
C:
U'