Уточнить поиск
Результаты 1-5 из 5
SCDPM-computer based crop pest and disease management system in Shaanxi province.
1988
Xie Xianyuan
This paper reports a simplified computerized pest and disease management system for wheat, maize, millet, cotton and rapeseed crops in Shaanxi province, hoping to furnish useful tools to the extension personnel in the field of plant protection. The pests and disease concerned are wheat midge, wireworm, wheat gibberella, oriental army worm, greasy cutworm, cotton aphid, carmine spider mite, millet stem borer, meadowy moth and rapeseed virus. Inputs are densities and growth stages of pests, diseases, their natural enemies and the corresponding host plants, and the current and forthcoming meteorological conditions. Output are given as predictions of future scale of diseases and pests and the pests and optimal measures at the recommended time.
Показать больше [+] Меньше [-]Cotton pests and diseases in Africa south of the Sahara
1988
Cauquil, J.
Les nombreuses illustrations permettent de determiner la cause des symptomes observes. Les ravageurs et les maladies sont classes suivant leur ordre d'apparition au cours du cycle de developpement du cotonnier : levee, phase vegetative, phase reproductive. Les symptomes d'origine diverse sont egalement presentes : intoxications par pesticides, desequilibres nutritionnels, foudre, etc. Les sujets suivants sont brievement developpes : elements de la biologie des ravageurs et de leurs ennemis naturels, transmission des maladies, resistance varietale, relations entre le systeme de culture et les problemes phytosanitaires, et prophylaxie. La lutte chimique est evoquee tres succinctement en raison de l'evolution constante de ses composantes
Показать больше [+] Меньше [-]Fungal diseases of fishes
1988
Hawariya Reungprach | Tanaporn Chittapalapong (Department of Fisheries, Bangkok (Thailand). National Inland Fisheries Inst.)
Fish fungal disease generally caused by family Saprolegniaceae in particular of genus Saprolegnia and Achlya are commonly found. Saprolegniasis appears like a cotton-wool covered on fish body. Generally, damage causing by other pathogens leads to fungus infection in fish. Fish usually becomes increasingly lethargic, weak and less responsive to external stimuli. Life cycle of Saprolegnia and Achlya is similar. Prevention and treatment of fungal diseases are included in this paper.
Показать больше [+] Меньше [-]The common diseases of cotton in China and a key of field symptoms
1988
Yao Yaowen (Chinese Academy of Agricultural Sciences, Beijing (China). Literature and Infermation Center of Scientific Techniques)
Cotton pests and diseases in Africa south of the Sahara | Coton et fibres tropicales
1988
Cauquil, J.
