[Investigations on prognosis to regulate infestation of damaging organisms in the agro-ecosystem winter wheat]

afidos aphide aphididae aphids aplicaciones del ordenador computer applications entwicklung erysiphe erysiphe graminis forecasting fungi homoptera mathematik modele modelos models prognose pseudocercosporella pseudocercosporella herpotrichoides septoria septoria nodorum symptom triticum aestivum