CIM23EAPP1-02-12

CIM23EAPP1-02-12 is an early-maturing, high-yielding, maize hybrid with white grain, drought tolerance, nitrogen-use efficiency, and resistance to GLS, TLB, ear rots, and MSV. Farmers noted it favorably for having large cobs.   General Information   Target region Eastern Africa   Adaptation/Agroecological zone 1300-1900 masl   Type of product Three-way cross   Year first announced 2025           Grain Yield   Why farmers say they like it* Grain yield (OPT) 6.75 t/ha   Good yield, early maturity, grain quality, large cob, disease and lodging resistance Grain yield (On-farm) 3.00 t/ha   Grain yield under low N stress  3.16 t/ha   *Common keywords from farmer feedback (EA-ROFT 2024-1B) Grain yield under managed drought 0.92 t/ha       Grain yield under MLN stress (AI) 6.15 t/ha   Kernel Characteristics       Kernel color White Agronomic Characteristics   Kernel texture Semi-flint Maturity group Early       50% anthesis 73.4 days   Biotic Stress Performance (864 GDD)   MLN (AI) (1-9)* 3.00 Anthesis-silking interval  1.06 days   Grey leaf spot (GLS) (AI & nat.) (1-9)* 3.05 Ear height  118cm   Turcicum leaf blight (TLB) (AI & nat.) (1-9)* 2.64 Plant height  219cm   Common rust (nat.) (1-9)* 1.99 Ears per plant 1.03   Ear rots (nat.) (1-9)* 8.25% Bad husk cover 7.89%   *Diseases are scored on a 1-9 scale, where 1 = Highly resistant; 5 = Tolerant; 9 = Highly susceptible. Ear aspect (1-5)* 2.40   Plant aspect (1-5)* 2.44       Root lodging 3.94%   Seed Production Characteristics Stalk lodging 6.50%   SC female parent yield 8.06 t/ha *Plant and ear aspects are scored on 1-5 scale, where 1 = desirable and 5 = undesirable characteristics   Male parent yield 1.88 t/ha   Nicking 4.6 days           Further Links   Comments Full Product Announcement
(including trial results summary and site information)   Product information is based on data from East Africa 2023 Stage 4 (CIM23EAPP1B-RT) and 2024 Stage 5 (EA-ROFT 2024-1B) Trials. Actual performance will vary depending on a number of agronomic and environmental factors. 

Abbreviations:
AI = artificial 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 disease pressure
NUE = Nitrogen-use efficient
Opt = Optimal management
ROFT = Regional On-Farm Trials
RS = random stress
SC = single-cross
TLB = Turcicum Leaf Blight