Effects of nutrients on diseases of lettuce Downy mildew of lettuce
Effects of nutrients on diseases of lettuce Downy mildew of lettuce
Effects of nutrients on diseases of lettuce Downy mildew of lettuce
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Effect <str<strong>on</strong>g>of</str<strong>on</strong>g> N <strong>on</strong> plant growth Effect <str<strong>on</strong>g>of</str<strong>on</strong>g> downy <strong>mildew</strong> and KNO 3<br />
1<br />
Lily<br />
Fresh weight (g)<br />
0.8<br />
0.6<br />
0.4<br />
0.2<br />
0<br />
Boomerang<br />
C<strong>on</strong>stanza<br />
Fortune<br />
0 1 5 12.5 25 40 70<br />
Potassium nitr ate (%)<br />
high<br />
medium<br />
low<br />
No N<br />
Incidence <str<strong>on</strong>g>of</str<strong>on</strong>g> <strong>Downy</strong> Mildew (%)<br />
100<br />
90<br />
80<br />
70<br />
60<br />
50<br />
40<br />
30<br />
C<strong>on</strong>stanza<br />
Fortune<br />
low high<br />
medium<br />
20<br />
10<br />
0<br />
0 Low Medium High<br />
Potassium nitrate KNO3<br />
Effect <str<strong>on</strong>g>of</str<strong>on</strong>g> downy <strong>mildew</strong> and Ca(NO 3 ) 2<br />
Effect <str<strong>on</strong>g>of</str<strong>on</strong>g> downy <strong>mildew</strong> and (NH 4 ) 2<br />
100<br />
90<br />
C<strong>on</strong>stanza<br />
100<br />
C<strong>on</strong>stanza<br />
Fortune<br />
80<br />
Fortune<br />
90<br />
80<br />
Incidence <str<strong>on</strong>g>of</str<strong>on</strong>g> <strong>Downy</strong> Mildew (%)<br />
70<br />
60<br />
50<br />
40<br />
30<br />
Incidence <str<strong>on</strong>g>of</str<strong>on</strong>g> <strong>Downy</strong> Mildew (%)<br />
70<br />
60<br />
50<br />
40<br />
30<br />
20<br />
20<br />
10<br />
10<br />
0<br />
0 Low Medium High<br />
0<br />
Low Medium High<br />
Calcium nitrate Ca(NO3)2<br />
amm<strong>on</strong>ium nitrate (NH4)2<br />
* No disease observed <strong>on</strong> “no nitrogen” treated plants
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