Genetic Technologies Limited
Hybrid P9978 P9978

P9978 Maize Silage Hybrid

Very productive. Very stable. Very defensive.

P9978 delivers a great all-round package with superior foliar health and silage eye-appeal.

  • Tall plant with low ear placement, strong roots and stalks, superior drought tolerance and staygreen.
  • Provides comparable silage yields to P9911, however, P9978 is slightly quicker to harvest, has better standability, Northern Leaf Blight and Rust resistances.
  • Delivers silage with higher energy and digestibility than P9911.
  • When planting early into cold wet soils consider planting P9650 or P9911.

Widely adapted to all North Island growing regions where this maturity is required.

Recommended established plant
populations (000's/ha)

Challenging yield environments


Medium yield environments


High yield environments


Download Tech Note

Recommended growing regions

Hybrid Region Map

CRM 99

Drought Tolerance 7

Stalk Strength 6

Root Strength 6

Early Growth 6

Plant Height 7

Staygreen 7


Seed tag colour

Maize for silage hybrid performance information

Feature hybrid Comparison hybrid Number of trials Harvest drymatter difference (%)1 Yield advantage (kgDM/ha)2 Statistical significance3
Northland & South Auckland
P9978 P9911 10 2.5 1233 star
P9978 P0362 26 2.9 -470 NS
P9978 P9650 11 -2.3 525 NS
P9978 P9911 43 0.8 457 CA
P9978 PAC249 22 -2.4 3495 starstarstar
P9978 PAC314 23 1.8 874 star
Central Hawke's Bay, Lower North Island & Taranaki
P9978 P9650 11 -3.6 1813 star
P9978 P9721 21 -0.9 2751 starstarstar
P9978 P9911 40 1 400 NS
P9978 PAC249 24 -0.7 2645 starstarstar
P9978 PAC314 20 1.1 2389 starstarstar

Scientific Designation

star 1 star 2 star 3 = very highly significant yield advantage to Pioneer

star 1 star 2 = highly significant yield advantage to Pioneer

star 1 = significant yield advantage to Pioneer

NS = not significant

CA = commercially acceptable

1 Positive DM differences means the bolded hybrid was drier at harvest, negative DM differences mean it was wetter.

2 A positive yield advantage means the bolded hybrid produced more yield, a negative yield advantage means it produced less.

3 For information on statistical significance click here.

IMPORTANT NOTE: Hybrid comparisons are only valid within a range of + or - 4 CRM. These descriptions mainly feature product strengths. When choosing hybrids, also review carefully the trait ratings found in the table here. Contact your local Pioneer Area Manager or merchant representative for further advice.

Talk to a Pioneer representative