PR39K13

Technical Profile of the PR39K13 Hybrid

The selection strategy of Pioneer s.a. for this hybrid focuses on ensuring yield stability under demanding phytosanitary conditions. PR39K13 is a simple maize hybrid designed with a genetic architecture that maximizes grain potential, provided that seeding regulations are strictly followed.

Phytopathological Resistance as a Core Defense

A key feature of PR39K13 is its balanced resistance to a complex of pathogens. The research conducted by Pioneer Hi-bred International has minimized infection risks for the following diseases:

• Loose Smut: Genetic protection helps eliminate significant yield losses during the early stages of inflorescence formation.
• Helminthosporiosis: Reduced leaf surface damage ensures prolonged photosynthesis, which is critical for grain filling during the 120–140 day maturation cycle.
• Stem Smut: Strengthening the stem's structural integrity prevents infection spread, ensuring consistent nutrient transport to the cob.

Agronomic Parameters and Density Optimization

The flint-type grain of PR39K13 strictly dictates its use for grain production. The FAO rating of 90–1240 indicates the hybrid's broad adaptability to various thermal conditions throughout the growing season. The recommended stand density is 65,000–70,000 plants/ha. Adhering to these density guidelines is essential; exceeding them may result in insufficient insolation for lower canopy layers and reduced thousand-kernel weight, whereas the recommended rate ensures robust root development and a high-quality, stable harvest.