Plants 19 Plant breeding 14 Pest control 10 History 9 History and criticism 8 Plant Breeding and Genetics 8 Plant Pests, (New March 2000) 6 Plant pests 6 Plant physiology 6 Transgenic plants 6 Beneficial Insects 5 Biotechnology 5 Crops 5 Forests and Forest Trees (Biology and Ecology) 5 Genetic Engineering, Gene Transfer and Transgenics, (New June 2002) 5 Genetic engineering 5 Genetically engineered organisms 5 Harmful Insects 5 Helpful Insects 5 Insects 5 Mass media 5 Non- Insect pests 5 Philosophy 5 Plant Production appliances 5 productive Insects 5 Biological Control 4 Biological control 4 Criticism and interpretation 4 Ecology 4 Insect pests 4