The true laurel laurel(Laurus nobilis ) is a brave herb flora that attend as a popular ornamental in balmy and warm climates . In addition to growing outdoors , they may be grow in a nursery in colder temperature . parting of the industrial plant , especially the leaves , are used to flavour food for thought , while the oil is used in massage therapy and is a plebeian treatment for poison common ivy rash . Once established , the tree diagram is very hardy , though it is susceptible to a few insects and pests .
Bay Sucker
The bay fool , also called jump plant lice , is fairly common among bay tree . If left unchecked , the bay sucker , which feeds on sap , will destroy foliage and may kill a tree . An early symptom of plague is yellow leave and a inspissation of the leaf tissue . As the embayment suckers start out to multiply , leave-taking will turn brown before dropping . raiser should look for a pale brown insect about 2 millimeters in size of it . To see to it the dirt ball , which will thrive in the grime before moving onto the industrial plant , it is important to take out infected leave-taking and stems and burn them . This will subjugate the chance of further transmission or the bugs transmit to other plant . The remainder of the industrial plant , particularly the undersides of the leaves , should be sprayed with an insecticidal easy lay . More serious plague may be treated with thiacloprid , which cultivate well against the bay laurel sucker .
Scale
There are more or less 8,000 species of scale bugs , pests that are broadly speaking between one - one-eighth and a quarter of an inch in size and tend to cluster together on leaves and sprig . Because of its diversity and small size , identifying scale of measurement may prove difficult . The bugs may be diffuse bodied or armoured and may be black , chocolate-brown , yellow or white . Like the Laurus nobilis sucker , scale rips open leaves and eats the liquidness inside , creating unsightly trap , but the hemipteron are not generally fatal if leave unchecked . Growers may fight the problem by infix natural foeman — ladybugs are favorites — or a right dose of insecticidal soap may also do the trick . A numeral of pesticides , admit poisons and insect growth regulators , are available to plow the problem .
Aphids
Aphids are common garden pests discover in just about every region of the country . They fertilize on most plant types , and more than 4,000 mintage cause rapid defoliation and eventual demise of the plant life . They are visible to the naked oculus , and their colors — admit fleeceable , xanthous , black and red — vary count on the coinage of the works being eaten . Growers may control aphid universe by inaugurate natural predators , include lady beetle , wasps or lacewing , or spray infected industrial plant with an insecticidal scoop or insecticide . To prevent problem , growers should remove weeds , lessen leaves and other rubble , as these provide a hiding place .
Beetles and Borers
Brown beetles , including the Asiatic garden mallet , are among the most common pests of Arthur Stanley Jefferson Laurel trees . The bug are approximately half an inch long and dark brownness in color . These pestilence tend to live on twigs , and they create unsightly holes by feeding on the parting . They also make leaf to wilt and reverse browned . The severity of the damage may vary depending on the specific specie , but it may bear witness disastrous if left untreated . A bit of rock drill species are also damaging to the bay laurel . They most often drill into novel growing , make death . The size and colouring of bore bit will variegate depend on the mintage , but growers should remove strike stem and branches as soon as a problem becomes plain . Insecticidal soaps are seldom efficacious , and most pesticide will not kill mallet or stone drill at all stages of animation , so a targeted spraying may be need .
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