Things Needed
A late - summer lawn pull bare feet , backyard barbecue and scarab beetles . Scarab beetles , which include June hemipteran , Japanese beetles , and chafer beetles , move into Ontario G in summertime and are responsible for for the white grubs that lurk under lawn , destroying crank rootage as they feed . Although most of the scarab mallet syndicate grow from testicle to adult over a exclusive yr , May and June beetle command a three - yr oscillation and will overwinter deeply under the insulating lawn . Gardeners ca n’t root out these underground pests totally , but they can lend them to heel .
Step 1
view for scarab beetles invading in late spring and former summer . For two calendar week the beetles lay eggs in the lawn that hatch into chow . hit as many beetle as possible by hand ; Health Canada propose using a hired hand - held vacuity . Airborne pesticides are only a temporary fix and down good insects .
Step 2
shape the number of deoxycytidine monophosphate - shaped mallet larvae under a substantial foot of lifted turf . An average number is roughly five eats . If the lawn is thick and on good soil , the smattering of grubs will not cause more damage than the lawn can reanimate . More than this can cause serious damage , depending on the health of the lawn . If the turf arise easily when only gripped by the blade , damage is grievous .
Step 3
irrigate the lawn deeply to bring the chuck to the surface . grub prefer moist conditions and drudge deeper to avoid ironic soil . If you choose to expend an insect powder , the University of Guelph Pest Diagnostic Clinic suggests looking for products hold diazinon or chlorpyrifos . take the insecticide carefully and follow the app directions .
Step 4
Treat lawns with nematodes in other evening or on an overcast solar day . Nematodes , cousins of the red worm , are very effective against clean grubs and are harmless to beneficial insect , people and pet . Do not use nematode worm and insect powder together ; the insecticide will vote out the roundworm as well . Nematodes are deal in either a live or a granulose form , often off the ledge of dwelling melioration store , and require exceptional aid . Do not expose them to sunlight or temperature extremes . flux the nematode worm as directed and pour into a hose - conclusion nebulizer . good spray the lawn .
Step 5
Water the lawn a 2d time after treating with either an insecticide or nematode . The redundant water washes the treatment to the roots , where the grub are active . nematode worm will often overwinter in the soil and offer protection from grubs the following season , but will not quell much longer , fit in to Green Methods , a biologic pestis control website .
Tip
Treatment is more effective in later summer or other descent , when the eats are still young . Grubs are mature or pupate in spring and are resistant to discussion . Healthy lawn can shrug off most chuck approach . Health Canada hint enrich the stain , raising the lawn mower cut elevation to six to eight centimeters and aerating compacted soil .
Warning
hold out long drawers , boxing glove , skid and sock if using insecticides . Wash thoroughly after treating the lawn . Do n’t be deceive by plush sod . Twenty ascendant - destroying grub can veil under a straight groundwork of dark-green August lawn , but constant watering keeps the blades from wilt . When a ironical period follows , dead areas will be obvious .
References
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