搜索结果: 1-3 共查到“apple orchards”相关记录3条 . 查询时间(0.043 秒)
Impact of insecticides treatment on phytoplasma infection risk in apple orchards
‘Candidatus Phytoplasma mali’ monitoring Cacopsylla picta Cacopsylla melanoneura
2016/9/2
During 2013–2015, a monitoring study was carried out on the migration, abundance, and infectivity of Cacopsylla picta and C. melanoneura in apple orchards that were under different types of management...
Prediction of profitability of topworking in older apple orchards under contemporary economic conditions of the Czech Republic
apple orchards top working economics costs profit cultivars tree densities rootstocks yields
2015/1/20
In the Czech Republic, there is still a predominance of obsolete apple orchards that were established more than 15 years ago and that are not profitable under contemporary conditions. Typical features...
OCCURRENCE AND POPULATION DENSITY OF APHIDS IN APPLE ORCHARDS OF SOUTH BULGARIA
apple aphids infestation Dyspahis plantaginea Dysaphis devecta Rhopalosiphum insertum Macrosiphum euphorbiae Aphis spiraecola Aphis pomi Eriosoma lanigerum
2014/2/21
In a 2006-2008 study, seven aphid species (Hemiptera: Aphididae) were detected on apple trees in South Bulgaria: Rhopalosiphum insertum Walk. (apple-grass aphid), Dysaphis plantaginea Pass (rosy apple...