Insights

Tissue-cultured MD2 pineapple plants are often presented as the answer to every planting-material problem: disease-free, uniform and fast to multiply. The scientific literature gives a more balanced picture. Tissue culture is a powerful tool for rapidly multiplying a new variety and producing virus-free plants, but it is also costly, carries a risk of variation, and if the mother plant is infected, the plantlets are infected too. This article describes the process, the advantages and the limits, so that companies know what to ask when buying tissue-cultured plants. Key points Commercial pineapple is always propagated vegetatively. Every MD2 plant in the world is a clone of a single original plant selected in Hawaii in 1973. It takes about 90 days from…

Flower induction is the step that sets the harvest calendar of an entire MD2 pineapple growing area, and therefore also the plant's raw-material intake schedule and the export shipping schedule. MD2 has two traits that must be taken into account: the variety is more prone than Cayenne to unscheduled natural flowering, and the substance used for flower induction, ethephon, is on the list of residue limits that the EU tightened from August 2026. Key points Ethylene is the only substance that triggers flowering in pineapple; ethephon and calcium carbide (acetylene) both act through this mechanism. In Costa Rica, MD2 plants are induced at about 8 months of age, weighing 2.5–3.0 kg; about 21 weeks later the fruit is degreened and…

MD2 pineapple (known in southern Vietnam as "thom MD2" or "khom MD2") accounts for more than 80% of the pineapples imported into Europe, yet for less than 5% of Vietnam's pineapple area. Vietnamese-language websites carry a good deal of misinformation about the variety: "MD2 stands for Malayan Dwarf 2", "it was crossed from Queen and Cayenne in the 1980s", "MD2 F1 planting material". This article sets out the origin, characteristics and position of MD2 based on authoritative sources, and serves as the hub page of the MD2 pineapple series on agrifoodv.com. Key points MD2 is hybrid 73-114, bred by the Pineapple Research Institute of Hawaii in 1970 and selected in 1973. "MD" stands for Mrs Millie Dillard, not "Malayan Dwarf".…

Ask "what makes an MD2 pineapple plant meet the standard?" and the first answer is this: Vietnam has no national standard for MD2 planting material or for tissue-cultured pineapple plants. The only standard for pineapple shoots, TCVN 9062:2013, applies only to the Queen and Cayenne groups, and checks pests and diseases by visual inspection. Companies therefore have to set their own quality requirements when buying planting material, based on the existing standard, the protocol of the Fruit and Vegetable Research Institute and international technical recommendations. Key points TCVN 9062:2013 "Pineapple planting shoots – Technical requirements" sets shoot weight and height for the Queen and Cayenne groups, with no section on MD2 or tissue-cultured plants. The Fruit and Vegetable Research Institute's…