| survey of scale insects of ornamental plants in alexandria governorate, egypt. | this investigation covers a survey of the scale insects associating with some ornamental plants at three chosen public gardens as well as at the experimental farm of the agricultural research station in alexandria governorate, egypt. a total of nineteen scale insect species belonging to sixteen genera related to four families of the super-family coccoidea were found infesting eighteen ornamental plants during the period from april, 1998 up to march, 1999. these species are: family: asterolecanii ... | 2001 | 12425080 |
| is ground cover vegetation an effective biological control enhancement strategy against olive pests? | ground cover vegetation is often added or allowed to generate to promote conservation biological control, especially in perennial crops. nevertheless, there is inconsistent evidence of its effectiveness, with studies reporting positive, nil or negative effects on pest control. this might arise from differences between studies at the local scale (e.g. orchard management and land use history), the landscape context (e.g. presence of patches of natural or semi-natural vegetation near the focal orch ... | 2015 | 25646778 |
| density and structure of saissetia oleae (hemiptera: coccidae) populations on citrus and olives: relative importance of the two annual generations. | saissetia oleae (olivier) (hemiptera: coccidae) populations were studied and compared in citrus (citrus spp.) and olive (olea europaea l.) groves to determine the number of generations, crawler emergence periods and changes in population density during the year. ten citrus and four olive groves were sampled regularly between march 2003 and december 2005 in eastern spain, covering an area of 10,000 km2. each sample consisted of 16 branches and 64 leaves. saissetia oleae populations presented a si ... | 2007 | 17716461 |
| ant-coccid mutualism in citrus canopies and its effect on natural enemies of red scale, aonidiella aurantii (maskell) (hemiptera: diaspididae). | mutualistic relationships between honeydew-producing insects and ants have been widely recognized for several decades. iridomyrmex rufoniger (lowne) is the commonest ant species associated with black scale, saissetia oleae (olivier), in the citrus orchards of the mid latitudes of coastal new south wales. citrus trees with high densities of both red and black scale and high ant activity were identified and the results of excluding ants from half of those trees (using a polybutene band on each tru ... | 2014 | 23597035 |