Aphids are one of the most serious agricultural insect pests causing major economic losses to crops, both directly through cell destruction from their feeding and indirectly by transmitting plant diseases such as viruses. The knowledge of seasonal history of pest is very important because the biology of pest population is a result of interaction among individuals of the species and their habitats. In this book we have presented research data on natural enemies of aphids and toxicity of insecticides against aphids. The data on biodiversity indices, their formulae and methods also given. for...

Rice is one the major crops in the agriculture world. India is the world's second largest producer of rice. Productivity of rice in India is less than 50% to that of china. Upland rice is cultivated in rainfed fields that are prepared and seeded when dry. The old rice varieties grown in the Marathwada region were tall in height and resistant to iron chlorosis, but in terms of quality parameters, they didn't meet consumer demand for long, slender grains and basmati type grain qualities like scent, intermediate amylose content, absence of white belt and softness when cooking. In this book,...