美学 发表于 2025-3-23 11:36:06
Deutschen Krebsforschungszentrumerted by the development of high yielding rice varieties between 1965 and 1975. In India rice production during 1950–51 which was 20.58 million tonnes with a productivity of 668 kg per ha rose to 79.6 million tonnes during 1995-96 with an average productivity of 1856 kg per ha. The production and prAnthology 发表于 2025-3-23 15:52:23
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https://doi.org/10.1007/978-3-642-87241-9e is a permanent ecosystem which provides habitat continuity for 1031 species of arthropods and 82 species of nematodes as reported from different parts of the world (.). In Asia, 230 species of insects and mite pests attack tea (.). However, 173 arthropods and 16 nematodes were reported to be major最低点 发表于 2025-3-24 01:15:50
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Deutsches KrebsforschungszentrumTobacco crop is attacked by several insect pests from sowing to storage. They cause serious economic losses both quantitatively and qualitatively. Chemical control of these pests has certain important limitations like pesticide residues. Hence their is need to rationalise pest control practices takiICLE 发表于 2025-3-24 13:49:37
Deutsches Krebsforschungszentrumrget organisms and of rapid rebound of target pests will be automatically alleviated. In order to appreciate the biological workings and ecological basis of biological control it is desirable to have an idea of different pest groups and their major characteristic natural enemies.培养 发表于 2025-3-24 18:49:37
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