P168 CEEFAX 168 Sun 22 Feb 20:30/13
8. 0
<hlhlhllhhlhl NATIONAL PLANT
7jkjijjjjjjjh DISEASE
5jjjjjjjjjjjz INTELLIGENCE REPORT
WHEAT BULB FLY
Dead-hearts (central shoot yellow,
outer leaves green) are now showing in
some crops in the eastern region:
further north damage not yet visible.
'here no protective measures have been
used, spray with Dimethoate, Formothion
or Nlfthoate when more than 50% of
plants or 30% of tillers) are vUsibly
attacked on early-drilled, well-
tillered crops. For latf-drilled,
backward crops thf spray threshold is
30% of plants or 20% of tillers).
More in a moment.....