Bradford pear trees , Pyrus calleryana var . ' Bradford , ' are extremely resistant to pests and disease . More likely to suffer from drouth or weak crotch formations , the Bradford pear is quick to grow and spry to spread , leading several geographic locating to label it an incursive species . Despite its hardiness and tolerance , some pest happen the tree irresistible .
Aphids
Aphids are small , herbivorous insects of the family Aphidoidea . Aphids are soft - bodied , green insects with two antennae and a pair of tubes branch from their abdomens . They feed on the atomic number 7 and sugars bring forth by the privileged layer of bark of the Bradford pear tree . This eating hinders the growth of the works , causing distorted or stunted development , according to the University of Florida Extension Office . The muggins the aphids subsist on curb very little nitrogen , which aphids need to produce proteins . Because of this , they eat copious measure of tree sap . The excess dough are excreted in a substance referred to as honeydew . This , in turn , may cause modeling to form on the tree . Aphids are controlled by releasing their predators into the sphere , include ladybugs and wasp . Neem and lantana oil color are efficacious at ensure aphid problems , and there are a multifariousness of chemical substance program to rid trees of these pests .
Shothole Borer
The shothole rock drill , Scolytus rugulosus , is a beetle that wipe out the bark of the Bradford pear tree . They are tiny insects with ignominious bodies and red peg . They burrow into the bark of trees , where they lie eggs and overwinter . There is some controversy as to whether shothole borer favour pathological and ill trees to levelheaded ones . The North Carolina State University Cooperative Extension Master Gardener Decision Support Guide express that shothole borers are a symptom of an already damaged or snuff it tree , while the British Columbia Ministry of Agriculture and Lands fact sheet on the shothole stone drill land that the pestilence are attracted to healthy trees as well . Control of shothole borer includes snip away idle leg and bark or intercepting the beetles before they gain the tree . branch may be coated with a pyrethroid insecticide to drink down the shothole borer beetles .
Ash Whitefly
The ash whitefly , Siphoninus phillyreae , attacks ornamental fruit tree like the Bradford pear . These pests begin as colony of larvae , initially appearing as a white , waxen spot on the undersides of leaves . full-grown ash whitefly appear as exceedingly tiny white , waxy insects with yellow - blanched wings and ruby-red eyes . Ash whiteflies feed on the farewell of the tree , puncture leaf veins with a spike - like protrusion . This eating causes folio wilt and drop cloth . Similar to aphids , ash tree whiteflies bring forth honeydew melon , which may in bout cause more problems for the Sir Herbert Beerbohm Tree . North Carolina State University says that insecticide usance in master ash tree whitefly is ineffectual . Natural control condition of ash whitefly using their rude vulture , specifically the wasp Encarsia inaron , is preferred . Removing all in , droop leaves and use soap are also valid methods of controlling ash whitefly equipment casualty to Bradford Pear trees .
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