I found this in my surfing.

"For tropical Africa, breeding work should aim at producing suitable cultivars for hot and humid conditions, with the necessary disease tolerances. The French company Technisem focuses on breeding for the tropics, mainly for West Africa, under the name Tropicasem. Depending on type preference, climate and disease problems, various options are available. The F1 hybrid ÂTOKYOÂ (slicer) is popular in West Africa. It tolerates hot and humid conditions, and has tolerance to downy mildew and CMV. Another, also heat tolerant, gynoecious hybrid is ÂOLYMPICÂ, which in addition to downy mildew and CMV has tolerance to powdery mildew and angular leaf spot. The pickling cucumber hybrid ÂANTILLAÂ is tolerant to heat, as well as to anthracnose, downy and powdery mildew. ÂARIZONA F1Â is a less heat tolerant pickler, but adds angular leaf spot and CMV tolerance. The Beit Alpha type ÂF1 BASMAÂ has tolerance to both mildews, and to CMV and WMV viruses. The hybrid ÂEXCELÂ has a less vigorous plant and is parthenocarpic; it is especially suited for greenhouse growing.

Cucumber cultivars from East-West Seed Company, developed in South-East Asia, are also adapted to hot and humid conditions. Available cultivars for Africa in the slicer type are the F1 hybrids ÂKANDEÂ and ÂKOSEYÂ, which have strong vigour and tolerance to downy mildew; ÂKOSEYÂ has tolerance to ZYMV and PRSV"