Influence of some natural factors on green apple aphid (Aphis pomi Deg.) reduction on apple trees
1991
Olszak, R.W. (Instytut Sadownictwa i Kwiaciarstwa, Skierniewice (Poland))
The impact of known and unknown factors on green apple aphid colonies on apple trees were investigated. Observations were carried out under field condition on isolated and non-isolated apple twigs in an orchard in Central Poland. It was found that in isolated colonies the number of aphids increased markedly and systematically during a relatively long time. At the same time on non-isolated twigs, after an initial increase, continuous reduction up to disappearance of this pests was observed
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书目信息
Roczniki Nauk Rolniczych. Seria E - Ochrona Roslin (Poland)
|
Polish Agricultural Annual. Series E - Plant Protection
卷
19
期
1-2
ISSN
0080-3693
页码
pp. 65-70
其它主题
Polonia/ cecidomyiidae; Pologne/ cecidomyiidae; Densidad de la poblacion; Arboles frutales; Densite de population
语言
英语
注释
1 fig.; 2 tables; 6 ref. Summary (Pl)
类型
Summary
1992-08-15
AGRIS AP