John McLennan, New Zealand

classic H W T

July 31, 2009

Categories: Breeding, Bulb Information, Growing Daffodils, Hybridizing, Planting

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Hi  Daffnetters, 
Another  photo  of  this  deep  gold  yellow  trumpet.
I  didn,t  realise  quite  how  early  it  was ,  I  knew  P. R.  was  not  breeding  early  flowers  and  that  it  was 
a  selection  from  a cross  that  would  hopefully  give  some  fine  show  trumpets.
I  put  it  in  with  the  late lines  and  it  went  through  the  H W T  in  mid  April  ,  quite  late  for  N Z  treatment.
It  also  recieved  a  generous  full  3  hours  in  the  tank  at  a  high  end  temperature.
The  leaf  and  stem  markings  and  slight  distortions  are  absolutely  classical  H W T  symptoms.
Late  varietys  that  had  the  same  treatment  are  now  emerging ,  also showing  H W T damage ,  but not  as  severe
as the  early  trumpet  given  a  hot  bath  when  it  had  obviously  started  its  growth  cycle.
Almost  all  that  planting  is  similar ,  —  but  I  tell  them  that  they, ll  thank  me  for  it  next  season.
Alls  well  that  ends  well ….
Cheers  John

4 responses to “classic H W T”

  1. Keith Kridler says:

    HMMMM so some years if the bulbs get cooked or steamed in the soil it will appear by looking at the foliage that they are diseased with Yellow Stripe Virus? Makes me think there are some pretty serious daffodil collectors that have dug up and discarded bulbs that they THOUGHT were diseased/virused but the bulbs were/might have been only showing HWT signs…..
    Anyone notice that the surface of the soil in this photo of John’s is showing EXTREME signs of excess fertilizer:-))) Normally here in Texas if you top dress the soil getting the fertility up where you can expect ideal plant growth you will get green algae growing on the surface of the soil just like in this photo from John. Normally the more green the more nitrogen you have still on the surface of the soil.
    Curious to know the blend of the fertilizer used and the PH of the soil in this photo! Ammonium Nitrate is available for plants NOW as soon as you apply it.
     Nitrogen from Urea normally takes about 10 days UNDER the soil to be available for plants. It needs to be processed by bacteria or a chemical break down.
    Ammonium Sulfate also needs to break down for a week or so to release the sulfur from the nitrogen. Soil bacteria needs to do this break down if I recall correctly.
    Keith Kridler Mt. Pleasant, Texas where overnight lows are normally in the 80’s*F or 27*C for weeks or months on end during the summer. We just had one of the coldest average temperature Julys ever on record for East Texas. But we still had days on end in excess of 100*F or 38*F during the first week of July

  2. Donna Dietsch says:


    Are saying that it gets so hot in Texas that the soil around the bulbs, which are maybe 8″ underground, will reach HWT temperatures?  HMMMM back at you.


  3. Brian Duncan, Northern Ireland Brian Duncan says:

      In my experience yellow stripe virus symptoms and HWT effect markings are quite didtinct – though I did wonder about the symptoms showing in the Y-T plant in John’s picture. HWT effect markings are usually restricted to the upper couple of inches of the leaves and are more greyish in colour and typically textured.
      Interesting, in your climate you may not need HWT – or the eelworm may have to burrow to cooler depths in summer to survive?? 

  4. Ted Snazelle, Mississippi Ted Snazelle says:
    A “tongue-in-the-cheek” comment:  In Central Mississippi, we don’t seem to have bulb fly or bulb and stem nematode to any degree; hence, we don’t do HWT as our fire ants eat them!
    With regard to rain here in Central Mississippi, the month of June had almost no rain, perhaps barely an inch.  The dry spell continued until July 14, 2009.  Beginning with July 14 and continuing through July 30, 2009, we had 9.7 inches of rain with rainfall occurring on eight different days with a peak of 3.7 inches on July 29, 2009. This may not be a record rainfall for July in Central Mississippi; however, it is the most that I can recall.
    P.S.  Seriously, I have never seen bulb fly or bulb and stem nematode in Central Mississippi except in bulbs that  have come in from out of state.  Basal rot is our biggest bulb nemesis.

    Theodore E. Snazelle, Ph.D.

    101 Water Oaks Drive

    Clinton MS 39056-9733