Table 1. Winged aphid populations monitored by water-pan and
 at Morikami Farm during the 1970-71 experiment.


 Direction of sticky board
H S E 1


Date


12-1
12-8
12-15
12-21
1-5
1-14
1-21
1-28
2-3
2-11
2-18


 8
 31
 39
 38
 13
 92
 20
147
46
94
15


sticky board traps


sticky board
 totals


12
13
20
14
.13
10
15
32
13
55
12


Total


Table 2. Effect of aluminum foil and
 during 1971.


Treatment


oil sprays on virus development

% virus infection
2/11 4/8


1 Check 6.3 25.9 100
2 Oil alone 7.3 9.0 89.1
3 Foil alone 5.2 16.9 95.9
4 Oil F Foil 4.1 5.8 63.0


__


_____~1_1~1_


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