CIM24EAEW-05

CIM24EAEW-05 is an early-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. It is notable for excellent yield both under optimum and on-farm condiations, and for  MLN tolerance.   General Information   Target region Eastern Africa   Adaptation/Agroecological zone 1300-1900 masl   Type of product Three-way cross   Year first announced 2026         Why farmers say they like it*       Big cobs, high yield, good ear placement (height), strong stems Grain Yield   Grain yield (Opt) 7.98 t/ha   *Common keywords from farmer feedback during CIMMYT's Eastern Africa 2025 regional on-farm trials  Grain yield on-farm >3 t/ha* 4.36 t/ha   Grain yield on-farm < 3 t/ha** 2.14 t/ha       Grain yield under low N 2.99 t/ha   Kernel Characteristics Grain yield under MD 1.92 t/ha   Kernel color White Grain yield under GLS (AI) 6.82 t/ha   Kernel texture Semi-flint Grain yield under TLB (AI) 8.3 t/ha       Grain yield under MLN (AI) 5.93 t/ha   Biotic Stress Performance *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   Grey leaf spot (GLS) (AI) (1-9)* 4.00   Turcicum leaf blight (TLB) (AI) (1-9)* 3.88   Maize Lethal Necrosis (MLN)  (AI) (1-9)* 2.50       Ear rots 5.9% Agronomic Characteristics   *Diseases are scored on a 1-9 scale, where 1 = Highly resistant; 5 = Tolerant; 9 = Highly susceptible. Maturity group Early   50% anthesis 68 days       Anthesis-silking interval  1.47 days   Seed Production Characteristics Farmers' score* 2.70   SC female parent yield 6.50 t/ha Ear height  115.80   Male parent yield 2.00 t/ha Plant height  212.28   Nicking 2 days Ears per plant 1.00       Bad husk cover 2.9%   Comments Ear aspect (1-5)** 2.51   Product information is based on data from CIMMYT East Africa 2024 Regional Trial and 2025 regional on‐farm trials 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 aspect (1-5)** 2.31   Root lodging 1.9%   Stalk lodging 5.2%   *Farmers' Score is based on a 1-5 scale where 1 = most preferred and 5 = least preferred
**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)