حشرات نافعة: الفرق بين النسختين

* {{cite web | url=http://www.cias.wisc.edu/crops-and-livestock/beneficial-insect-habitat-in-an-apple-orchard—effects-on-pests/ | title=Beneficial insect habitat in an apple orchard: Effects on pests | publisher=Center for Integrated Agricultural Systems, College of Agricultural and Life Sciences, University of Wisconsin-Madison | work=Research Brief #71 | date=September 2004 | accessdate=August 02, 2012}}

* {{cite web | url=http://www.wa.nrcs.usda.gov/news/Footprints/Summer10/Beneficial_Insects.html | title=Orchardists Install Beneficial Insect and Pollinator Habit | publisher=USDA Natural Resources Conservation Service | accessdate=August 02, 2012}}

 

== وصلات خارجية ==