designation of white grub and intervention at the right time in their life wheel is primal for their control .
If in July or August , your grass turns brown and is easy to pull in up , or you point out a lot of critter , such as skunks or racoon , tearing up your lawn , it may be infested with grubs . snowy grubs are thelarvae of Nipponese mallet , June beetles , or mask chafer beetles . They make legal injury to lawn by feed on the roots of locoweed .
To get rid of livid grubs , it is key to name which grubs are in your lawn and understand their life cycle because successfully treating grubs is all about timing .
Credit: Jay Wilde
Identifying the Pest
Depending on the metal money , grub may have a one - year to three - class life bike .
Annual white grubsare the larvae of the Japanese beetle , mask chafer beetle , and others . They begin their life cps in mid- to recent summertime , spring up quickly , and do most of their feeding in previous summertime .
Multi - annual blanched grubsare the larva of several species of June beetles that take two to three twelvemonth to make out their life rhythm . They emerge in May or June , provender during the summertime and fall , and overwinter late in the soil .
When to Control Grubs
Controls are most in force on green grubs . For most mintage and location that signify July or August is the prize time to regale the grubs with an insecticide . However , because eats population alter from twelvemonth to class , you may be able to save the monetary value of treatment if you first sample your lawn to estimate how many grubs are present :
A healthy , well - maintained lawn is less prostrate to grub damage than a stressed lawn . pick out a desirable type of turfgrass for your climate , give the lawn without overfertilizing it , and follow other crest for proper lawn care . Check out the seasonal lawn - care schedules for theNortheast , Midwest , Pacific Northwest , andSouthern California .
Natural Grub Control
Milky Spore
Milky spore ( Paenibacillus popilliae ) is a born bacterium that can in effect control Japanese mallet grubs by causing a continuing infection in Japanese beetle grubs and diminishing their replica numbers pool over sentence . The downside is that milky spore ordinarily takes several years to take effect . Furthermore , it requires some grubs to live on , so do n’t use it together with chemic controller . whitish spore hail in pulverization form and it is only effective on Nipponese mallet grubs .
Nematodes
Beneficial nematodes are microscopic worms that live in the territory . They essay out grubs , and after enter their body , release bacterium that act as killers . The two major type of louse parasitic nematodes areSteinernemaspp . andHeterorhabditisspp . The nematodes are applied as a springy product , so make certain that they are alive , that they ’ve been handled cautiously , and that their ledge life has not expired . These two eccentric of nematodes are effective on all type of grubs .
Weather and Irrigation
chuck populations are usually the highest when soil term are consistently moist . In dry age , or if you withhold irrigation urine during red-hot summer months , many grub will not go . This strategy may work well for bluegrass lawns , which recover well from summer dormancy .
Chemical Grub Control
Because grub population vary well from year to year , preventative chemical substance controls are seldom justified . But if your lawn is systematically attack by grubs , you might want to study put on a chemical insect powder . Chemicals labeled for curative control are carbaryl , halofenozide , and imidacloprid . You must apply these chemic controls at the right time when the grub are little and actively feeding near the soil surface , commonly from other July until mid - August .
body of water in the chemical substance controls how they penetrate the soil and act on the grubs . Watering the lawn after chemical software not only motivate the product down into the Edward Teach layer , it also stimulates the grubs to move upward in the soil , nearer to the chemical substance .
Most insecticides not only kill bloodless chow but they are also extremely toxic to bees and other pollinating insects . Always apply chemical insecticides as the last haunt , weigh how long they are effectual against chow vs. their potential risks , and carefully stick to the label command before applying the product .
Frequently Asked Questions
depend on the species , they turn into Japanese beetle , mask chafer beetles , June beetle , scarab beetles , or another character of mallet .
clean chuck , which last in the soil , can wreak mayhem of a lawn but they do n’t sting or seize with teeth humans or darling nor do they communicate diseases .
