New Zealand – Processed Peas:

Introduction

Process Pea production requires that a crop be in the ground for around 3 months. In this time it can become infected with a number of diseases that effect seed yield.  The two major diseases are root rot and leaf blight. Pea yields have been poor for the last 5-10 years with no improvement in yield in fact, yields have probably decreased. The main reason for this is little resistance of the varieties to root rot.  A field trial of ComCat to look at yield responses was established in the October of 2008 in the Winslow area of Mid Canterbury on a commercial arable property. It was monitored regularly for visual developments throughout the season. 

Method:

To apply ComCat Row + ComCat Wetting Agent (Angro) at the rate of 400gms/ha in 200lt/ha of water via commercial spray vehicle, when peas reached the growth stage of 3-4 leaves.  This was done over five hectares of the paddock leaving two hectares untreated.

This was applied 7 weeks after the peas were planted and a second spray of 400gms/ha was applied to the crop pre-flowering.  The growing season was above average in temperature October to January but below average in rainfall. The Peas were assessed one week prior to harvest, the collecting of peas via removing plants and measuring weights of whole plants with also the weight of the removed pods. This was repeated again one day before harvest.

Graph One

These results were taken one week from harvest weighing complete plants which equated to a total dry matter yield of 16784 kgs/ha averaged in the treated plots and 9848kgs in the untreated plots.  (70% increase).

Graph Two

These results are taken one week from harvest by weighing Pods which equated to a total yield of 8720 kgs/ha averaged in the treated plots and 5900kgs in the untreated plots.  (48% increase).

Graph Three

These results are taken one day from harvest weighing complete plants which equated to a total dry matter yield of 37816 kgs/ha averaged in the treated plots and 22894kgs in the untreated plots.  (60% increase).

Graph Four


These results are taken one day from harvest weighing complete pods which equated to a total dry matter yield of 25528kgs/ha averaged in the treated plots and 15823kgs in the untreated plots.  (61% increase).

Graph Five

These results are taken one day from harvest weighing peas only which equated to a total dry matter yield of 14263kgs/ha averaged in the treated plots and 8856kgs in the untreated plots.  (62% increase).

Photo of root development, plants on right treated and left untreated

 

Conclusion:

Plants treated with ComCat increased pod yields from +48% one week from harvest to +61% one day from harvest.

Plants treated with ComCat increased total biomass +70% one week from harvest to +60% one day from harvest.

Pea yields one day from harvest increased 62% in plots treated with ComCat.

There was little disease noted when roots were inspected in either the treated or untreated parts of the paddocks.

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