CIM23EAPP2-15

 

CIM23EAPP2-15 is a late-maturing, high-yielding, white maize hybrid, with resistance to GLS, TLB, rust, ear rots, root & stalk lodging, bred for use in tropical, rainfed, wet upper mid-altitude areas in eastern Africa and similar agroecologies.    General Information   Target region Eastern Africa   Adaptation/Agroecological zone 1300-1900 masl   Type of product Three-way cross   Year first announced 2025         Why farmers say they like it*       Good yield, grain quality, kernel size, pest and disease resistance Grain Yield   Grain yield (OPT) 8.12 t/ha   *Common keywords from farmer feedback (EA-ROFT 2024-P2) Grain yield (On-farm) 4.88 t/ha       Grain yield under low N stress 2.96 t/ha   Kernel Characteristics Grain yield under managed drought 2.14 t/ha   Kernel color White *Average of ROFT sites where grain yield was greater than 3 t/ha
**Average of ROFT sites where grain yield was less than or equal to 3 t/ha   Kernel texture Semi flint         Biotic Stress Performance       Grey leaf spot (GLS) (AI) (1-9)* 2.25 Agronomic Characteristics   Turcicum leaf blight (TLB) (AI) (1-9)* 2.93 Maturity group Late   Rust (nat.) (1-9)* 2.34 50% anthesis 83.9 days   Ear rots 5.80% (917 GDD)   *Diseases are scored on a 1-9 scale, where 1 = Highly resistant; 5 = Tolerant; 9 = Highly susceptible. Anthesis-silking interval  0.47 days   Ear height  119cm       Plant height  239cm   Seed Production Characteristics Ears per plant 1.01   SC female parent yield 5.74 t/ha Bad husk cover 5.6%   Male parent yield 1.97 t/ha Ear aspect (1-5)** 2.03   Nicking 2.63 days Plant aspect (1-5)** 2.83       Root lodging 6.6%   Comments Stalk lodging 7.1%   Product information is based on data from East Africa 2023 Stage 4 (CIM23EAPP2-RT) and 2024 Stage 5 (EA-ROFT 2024-P2) Trials. Actual performance will vary depending on a number of agronomic and environmental factors. 

Abbreviations:
AI = artificial infestation/inoculation
FAW = fall armyworm
GDD = growing degree-days (°C)
GLS = Grey Leaf Spot
Low N = managed low nitrogen
masl = meters above sea level
MLN = maize lethal necrosis
MSV = maize streak virus
nat. = natural infestation
NUE = Nitrogen-use efficient
Opt = Optimal management
ROFT = Regional On-Farm Trials
RS = random stress
SC = single-cross
TLB = Turcicum Leaf Blight *Plant and ear aspects are scored on 1-5 scale, where 1 = desirable and 5 = undesirable characteristics           Further Links   Full Product Announcement
(including trial results summary and site information)