It’s hard to forget the years that we’ve been plagued with Japanese beetles. These ravenous creatures can destroy your lawn, garden and good nature in one season by eating away precious time and money invested in our landscapes. As they know no boundaries, Japanese beetle control methods are most effective if neighborhoods band together in their efforts. So, rally the troops! 

Identification & Damage 

Japanese beetles are a problem at two stages of their life cycle: larvae and adult. The larvae, called grubs, are actively feeding from August through October and again in April through May. It is during this time that the grubs are closest to the soil surface feasting on plant roots, especially grass roots. A heavy grub population will result in dead patches of turf that can be lifted like a carpet. Japanese beetle grubs are 1 ½” long, C-shaped and white with a brown head. When gardening, you will almost always find some grubs in the soil. Small populations of grubs can be present in the soil without significant damage to the lawn. If you notice more than a dozen per square foot, however, this constitutes a problem that should be dealt with. 

Adult Japanese beetles have a hard-shell body that is about ½ inch long. They are metallic-green and copper-colored. At this stage, beetles can decimate a plant in record time by skeletonizing the leaves – nibbling off all the foliage between the veins. Adult beetles start to emerge from the soil with a frenzy of feeding, mating and laying eggs. You will find adults feeding in groups in full sun, and they feed on over 300 different species of plants. These insects maintain this frantic level of activity through the first half of August. The females lay their eggs on the ground. When the eggs hatch they dig their way into the soil to feast on plant roots in preparation for winter. As soil temperatures decrease the larvae move deeper into the soil only to resurface and feed on plant roots again in spring. 

Beetle Control Methods 

There are several methods to control both Japanese beetle grubs and adults, some environmentally-friendly and some more harshly chemical. Always read pest control labels in their entirety even if they are listed as organic or environmentally-friendly. These labels are meant for the protection of you, your plants and the planet. 

Environmentally-Friendly Adult Beetle Control 

Effective options for controlling adult Japanese beetles with the least harm to plants and the landscape include… 

• Manual Removal – Pick off and destroy the feeding adults even if you see just a few. Japanese Beetles produce pheromones that will attract many more to your property, so it is best to pick them off and destroy them right away.
• Use Non-Attractive Plants – If you have a shade garden you will not have a problem with Japanese Beetles. In sunny areas, choose plants that beetles don’t like.
• Trap – Pheromone traps lure adult beetles, sometimes hundreds a day, and trap them in a disposable bag. Replace the bag as necessary. Place trap at least 20 feet from the plantings that you are trying to protect to lure the beetles away.
• Row Covers – Floating row covers of reemay fabric may be placed over plants to avoid beetle damage by keeping the beetles from accessing the plants.
• Pyrethrins – These insecticides are naturally derived from the pyrethrum daisies. Pyrethrins attack the insect’s central nervous system, producing a rapid knockdown. The residual effect, however, is only 5 days, so several applications may be needed to control severe infestations.
• Insecticidal Soap – This soap is a contact kill with no residual control, but can be useful for smaller infestations or few beetles.
• Neem Oil – This oil is an organic control that repels Japanese beetles. Spray early in morning or on an overcast day. Because neem is an oil, you may burn plant leaves if spraying in full sun. 

Chemical Adult Beetle Controls 

When using any chemical controls, read the product label completely and follow application instructions meticulously. It is a good idea to use a spreader sticker so that the chemical will adhere to the plant for the greatest effect. Popular chemical options to control adult Japanese beetles include… 

• Sevin – This chemical is absorbed through the skin and will kill beetles on contact. It has a 7-10 day residual effect but must be reapplied after a rain. Consult label for recommended time that fruit and vegetables may be consumed after application.
• Pyrethroides – Synthetic pyrethrin-like insecticides kill on contact and have an 8-10 day residual effect. Fruits and vegetables may be consumed in a shorter time period after application than Sevin.
• Acephate – This systemic control works by poisoning the plant. The insect dies when the plant is ingested. Must not be used on edibles.
• Malathion – This chemical must be ingested by the insect, however, this product may be used on edibles. Check label for number of days between last application and safe harvest.
• Imidacloprid – Sold as a liquid form of Merit, this product is systemic and must be applied at least 20 days before anticipated adult Japanese beetle feeding. Only one application is needed per year. Use only on ornamentals.

Environmentally-Friendly Grub Control 

For truly effective Japanese beetle control, it is also necessary to control the grubs. This can be done in a number of environmentally-friendly ways, such as… 

• Milky Spore – This biological control effects only Japanese Beetle grubs. Once this bacteria is established it can last in the soil for up to 20 years. It is completely harmless to people, pets, birds, fish and beneficial insects. Apply anytime the ground is not frozen.
• Beneficial Nematodes – These microscopic worms kills grubs by feeding on, and reproducing in, the grub’s body. This is an excellent choice for a vegetable garden and should be applied after the soil is warm. Late summer/early fall application is best. 

Chemical Grub Control 

Chemical controls can also be effective at minimizing the harm from Japanese beetle grubs. Good options include… 

• Merit – The granular form of this chemical is a systemic, season-long grub control with a 4-month residual effect, though it must be ingested by the insect. It is applied 3-4 weeks before grubs are actively feeding, mid-May through mid-June. Must be watered-in within 24 hours of application.
• Dylox – This compound is absorbed through the grub’s ‘skin’ and will kill within 24 hours of application. Use only in late summer through early fall while grubs are still close to the soil surface. Must be watered in. It is active for up to 7 days in the soil.
• Sevin – In its granular form, Sevin is a contact kill and will not remain active in the soil longer than 7 days. This product is used most effectively from mid-August through mid-October. Must be watered in.

With so many options for effectively controlling these pernicious insects, there is no reason why you need to keep being bothered by Japanese beetles. Once you know more about these insects and their habits, you can easily keep them away.

You may want to grow many different things in your vegetable garden, but weeds probably aren’t on your favorite edibles list. Weeding can be an enormous time-drain and is one of the the least liked gardening chores. What’s wonderful is that we have so many weed control methods to choose from; there’s a solution for every type of gardener and their schedule.

Safe Control Methods in Edible Gardens

When it comes to vegetable gardening, many gardeners are very particular about what goes into their soil and onto their plants, as it will eventually end up on their plates and in their bodies. Here are some indisputable safe and effective ways to control weeds, without chemicals, in your veggie or any other garden for that matter.

• Apply corn gluten meal to prevent weed seeds from germinating (don’t use if direct seeding your garden as all seeds will be affected).
• Plan your garden to crowd edible plants together, effectively crowding out weeds because there isn’t space left for them to grow.
• Manually pull weeds when the soil is wet and roots are looser. This can be done after a natural rainfall or after supplemental watering.
• Hoe when the soil is dry to break apart weeds and damage their roots. Pick up larger weeds after hoeing so they cannot reestablish themselves.
• Mulch with salt hay which contains no weed seeds. The hay will shield weed seeds from the sunlight and moisture they need for germinating.
• Lay biodegradable and compostable mulch film down to create a firm barrier to keep weeds out or to prevent existing weed seeds from germinating.
• Attract seed-loving birds such as finches and sparrows, which will happily eat hundreds of weed seeds each day for natural control.
• Consider raised beds or container gardening to more effectively control weeds and make any remaining weeding easier.
• Use fire (with all appropriate safety precautions) to burn out unwanted weeds, especially in pathway areas or along garden borders.
• Treat exposed weeds with boiling water – the hotter the better – to cook and kill them. Several treatments may be needed for the best effects.

Weeds can be some of our worst enemies in the garden, and it is impossible to eliminate every single weed all the time. By using multiple methods and keeping on top of the task, however, it is possible to minimize weeds and make this chore less onerous, without resorting to harsh chemicals.

When you hear “yellowjacket,” what’s the first thing that comes to mind? A buzzing, stinging insect ruining your outdoor meal or a treasured pollinator of many plants? A yellowjacket is both!

About Yellowjackets

The most commonly found yellowjacket is the Eastern yellowjacket (Vespula maculifrons). The Eastern yellowjacket is a wasp that is 1/2 to 5/8 inch long and is black and yellow striped. The body is curved under and is wider than the head. Yellowjackets do not have any “hairs” such as are found on honeybees and bumblebees.

Yellowjackets are generally ground nesters, however, in some situations, especially in urban areas, they will make their nest above ground such as in hollow walls and attics.

During the spring and summer, the colony population increases from the fertilized solitary queen, who survived the winter, to several thousand. Adult yellowjackets feed protein to the young wasps and larvae while they subsist on sugars. Foraging for food, the wasps cross-pollinate plants while seeking small insects and nectar. Yellowjackets provide a valuable service to humans by consuming numerous insects that eat ornamental and cultivated plants.

On the other hand, yellowjackets are drawn to cookouts, picnic areas and garbage cans. Their sting, unfortunately, is especially painful. Unlike honeybees, which only sting once, wasps can sting numerous times. Some people react severely to the venom and may have problems breathing or other dangerous reactions.

To Minimize Yellowjacket Interactions

Despite their good characteristics, many people prefer to keep yellowjackets away from picnics, play areas and yards. To reduce the possibility of inviting yellowjackets to your outdoor party…

• Don’t leave moist pet food outside during the summer. Bird seed is fine, but not suet.
• Keep garbage cans washed. Securely cover all garbage cans and recycling containers. Rinse beer, wine, soft drink and ice cream containers before disposing of them.
• Keep garbage cans away from entertainment areas, play areas and pathways.
• If eating outdoors, cover all serving plates and drinking glasses/bottles to prevent yellowjackets from getting into food or drink. When yellowjackets are in the area, be sure to check your food and drink before consuming.
• Yellowjackets feed on aphids and scale on trees and shrubs. Therefore, spray for these pests in July and August, if needed, to remove that food source.
• Repair dripping hoses and faucets as the puddles can attract wasps.
• Wasps enjoy rotting fruit. Harvest tree and cane fruits when ripe. Carefully pick up all fallen fruit (gloves are a good idea!) and dispose of it in a covered container.
• Wasps create a flight-path from the nest to food sources. Avoid this area. If this is not possible, consider removing the nest.

Yellowjacket Traps

To help make your outdoor gatherings more pleasant and safer, yellowjacket traps can be effective. Hang these around the perimeter of your yard if you plan to eat outside, but never hang traps near the food area, as you will only increase the attraction to that area. Some traps are disposable and have the benefit of reducing the sting possibility. Others are “reusable” and must be emptied and refilled with bait. These increase the probability of being stung but can be more affordable in the long term.

Eliminating Yellowjacket Nests

When absolutely necessary, the elimination of a yellowjacket nest should not be undertaken lightly. If it’s early in the season and the nest is visible, a forceful water blast will break it apart. To reduce the chances of being stung, do this during the day while the workers are not home. Wasps return to the colony as dusk. Sometimes the workers will begin rebuilding in the same place. Pesticide sprays can kill wasps, and after the nest is destroyed, spraying the area can discourage rebuilding. If it’s later in the season, the aerial nest may be too large to eliminate safely.

Underground nests are a much bigger challenge to destroy. Because the entrance may be at an angle to the nest, flooding seldom works. Never try to burn a yellowjacket ground nest by pouring kerosene or other flammable liquid into the entrance and lighting it. In addition to many stings, more serious injuries may occur. This also pollutes the soil and a fire can quickly get out of control. If the flight pattern to the entrance creates a serious hardship or is close to a building, it is best to consult with an expert for safe nest elimination.

If the yellowjackets have built their colonies within your house walls or attic, it may also be necessary to contact a professional. Note: if yellowjackets are nesting in your home, do not plug the entrance/exit hole or they may chew the rest of the way into your house! Our experts can offer a professional referral for local wasp removal services or search “Pest Control” for your city on the Internet or in the yellow pages.

Yellowjackets do have their uses, but if you have no use for these stinging insects, there are many ways to eliminate them safely. Using several techniques will be most effective and will minimize the risk of being troubled by wasps again.