It is usually around September that we get an influx of calls regarding Grub destruction to the lawn, where grub killer was already applied by the homeowner this season. Many factors go into successful Grub suppression. The most important is knowing its life cycle. Mastering the life cycle of numerous Grub types is a professional applicator’s biggest challenge during licensing preparations. Without this knowledge, you run the risk of spreading product of the wrong type at the wrong time, or even treating for the completely wrong problem. Here we discuss why Grubs may still linger after a homeowner application, and why professional treatments are usually the only effective option.
Life Cycle Timing
Grubs have a very unique life cycle from most other insects. There are two generations that will appear at two different times of the year. Temperatures affect these cycles and can move pupation timing off when making treatment decisions.
In Spring you are targeting overwintering larvae before they grow into adult Beatles and emerge. These will be the generation to lay eggs for the next round of feeding Larvae in the Fall. By Fall you battling against emerging Larvae buried deep in the soil.
Read more on the life cycle of Grubs here: https://www.lebanonturf.com/education-center/insect-pests/white-grubs
Timing of Grub treatments will determine the type of product used. Some products are more preventative, and some more curative in formulation. Using the right product at the right time can mean achieving complete control of Grubs, or be an absolute miss.
Curative products are used after full infection and aim to kill almost full-grown adults at a late point in the season. This is highly ineffective for many foreseeable reasons. This formulation is most commonly used in store bought homeonwer Grub products.
Preventative products penetrate the soil deeply to treat grubs at a much earlier, more effective phase of growth. Unfortunately, these products are one of the very few Pesticides restricted to only licensed professionals. For this reason, professional application, share an exclusive level of effectiveness.
Grub damage will present as brown or yellow dying patches of grass in various areas in your lawn. This presentation can be true for many Fungal diseases, other insects, dog spots or drought. Not taking the extra step to properly determine you have grubs can lead to wasting costly product, and still having the original problem persist.
Fortunately, there is one tell-tale sign unique to Grub infestation that you can use to distinguish it from other causes. Because Grubs feed exclusively at the roots of the grass, they create a separation between the sod layer and the turf. If you pull on affected areas on your lawn, it will easily lift like a carpet. This is a sign that you have a root-feeding pest, most likely Grubs.
Benefits of Using a Professional Grub Control Service
It can become frustrating to waste money and time on store-bought lawn care products and not get the desired or promised results. It is however the case with Grub control that materials and knowledge available to licensed professionals surpass the likes of Grub-Ex and other box store offerings. The knowledge of this pest’s life cycle, the ability to adapt to changing weather conditions, and stronger prodcut availability make the difference.