The invasive Nipponese beetle damages a range of plants , including the birch Sir Herbert Beerbohm Tree , where it likes to feed on the upper leave peril to full Dominicus . Adult Japanese beetles , just under 1/2 column inch long with a metal unripe organic structure and coppery brown wing covers , leave behind their theme song skeletonized leaves where they have fed . Since these pests spend ten months of the year in the greensward , it is most effective to handle Japanese beetles grubs in the primer . Reserve pesticide habit for when damage from beetle has been documented over two or more years and when mallet numbers become unreasonable . To best get rid of Nipponese beetles on a birch tree tree diagram , lead off underground .

Step 1

trim back four equally spaced sampling in the turf in early spring from where you suspect grownup beetles have come forth . Use a hand trowel to cut a 6 - by-6 - in square on three side . Pull back the turf and examine the top 2 inch of soil . Count the number of eggs present in each 6 - in square domain . If you find two to three per public square , plus obvious price to the sod , go on with chemic treatment .

Step 2

go for imidacloprid , a long - lasting reduced - risk insecticide , in mid to late June , before ballock hatch into grubs .

Step 3

Step 4

irrigate the area with a 1/2 inch of water immediately after the chemical app to encourage the chemical to flow down to the stem zone .

Step 5

Continue to irrigate the handle area every four to five days so the trichlorfon can exploit by rights .

Tip

Take proactive steps to keep Nipponese mallet from invading your yard . The University of Utah Extension recommends encouraging natural foe of the Japanese mallet by plant a miscellany of flora that produce pollen and ambrosia , and take plants that grownup beetle avoid , such as cornel , American holly , lilac , magnolia , and forsythia . use pesticide in the afternoon , when beetles are most active .

Warning

Nipponese mallet bunker may do more harm than well , fit in to the University of Illinois , because the traps attract more beetles to the area than they capture .

Things Needed

References

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