cucumber problems - help please

 


Ive got cucumbers in a grow bag in a greenhouse, last year in the same
position
they were great, lots of fruit and no problems,  this year they
are being
treated exactly the same but after the fruit has developed to
about 1" long it
turns yellow and wilts (or rots?).

The leaves look OK and there is no obvious sign of pests or diseases,
any ideas
please?




--
Zaf

 



Any sign of pollinators, e.g. honey bees?
--
- Billy
"Fascism should more properly be called corporatism because it is the
merger of state and corporate power." - Benito Mussolini.
http://www.democracynow.org/2010/7/2/maude
http://www.democracynow.org/2010/6/28/naomi_klein_the_real_crime_scene

 

Zaf said:

I would suspect lack of pollination.  This could be due to lack of
pollinators visiting the plants, or due to a lack of male flowers.

Some cucumber cultivars are gynoecious (bear only female flowers),
and require another cucumber cultivar to pollinate them.  Usually seeds
for a pollinator variety are included in packets of gynoecious cultivars.  
Home gardeners growing only a few cucumber plants risk not having
enough plants to ensure one of them is the pollinator cultivar.

Cucumbers cultivars can also be parthenocarpic (set fruit without
pollination) and these cultivars are ideal for greenhouse growing.


--
Pat in Plymouth MI
    
"Vegetables are like bombs packed tight with all kinds of important
nutrients..."     --Largo Potter, Valkyria  Chronicles
 
email valid but not regularly monitored
  

 

We have exactly the same problem As ZAF in the interior of British
olumbia  - blooms, then fruit, then they turn yellow and do not develop.
However a couple of cukes have developed on a couple of the plants - does
this eliminate the pollination problem as a cause?

 

Graham Gilbert said:

No, I think that inadequate pollination would still be a prime suspect.

Either most of the blossoms are not being properly pollinated or the
cucumber vines are aborting the fruit because they are under stress
(examples: disease, lack of some particular nutrient, too much shade).

--
Pat in Plymouth MI
    
"Vegetables are like bombs packed tight with all kinds of important
nutrients..."     --Largo Potter, Valkyria  Chronicles
 
email valid but not regularly monitored