Organic Seed Allianceregularly publishes and distributes resources free of charge. OSA'spublications include manuals on how to conduct plant breeding, seed production, and variety trials; record keeping materials; proceedings from our Organic Seed Growers Conference; and policy reports, webinars,...
17 جولائی 2017 Insects and other pests can be a serious constraint to food production, especially where resources for pest management are scarce. For example, in EDN 133, we responded to a question about problems with tomato leaf miner (Tuta absoluta) in Nigeria. Heavy infestations of this pest alone can reduce...