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0000015160 00000 n This diagram shows the location of the raster pattern. Therefore, a curative application has to be made at the proper time. Your next step is to apply Nematodes in July. %%EOF 0000013525 00000 n 0000013688 00000 n They specifically target grubs by eating the larvae from the inside. However, it is important to remember that this information is based on data collected from central Pennsylvania or University Park, Pa. You would have to adjust your treatment schedule based on what happened in your specific geographical region. You must have JavaScript enabled in your browser to utilize the functionality of this website. Two major species available for suppressing grubs are Steinernema spp. An excellent way to determine if you have an infestation before your lawn gets ripped apart is to peel back a square foot of sod and examine the soil underneath. Hence, a preventive application of a registered insecticide applied between mid-June and mid-July in 2005 in Centre County should have provided preventive control of the two latter scarab white grubs (i.e., Japanese beetle and northern masked chafer). Optimum timing can vary by several weeks but is dependent on grub species and weather conditions/soil temperatures in a given year. startxref Figure 5. Be sure to read the accompanying literature with each shipment or purchase of insect parasitic nematodes since select pesticides can negatively impact these living organisms. Therefore, it is very important to know how to identify each species in order to effectively select and time control measures. The European Chafer beetle is a grub that feeds on the roots of plants. 0000015327 00000 n 5). Likewise, using a curative insecticide with a limited residual effect in April or May affords no protection against reinfestation by egg-laying adult beetles later in the season. Heavy white grub infestations can destroy grass roots, causing the affected area to become spongy, which allows the sod to be rolled back like a piece of carpet. 0000005960 00000 n 1) by the larval stages (grubs) of various species of scarab beetles. ��1ߠ0y� Curative grub controls usually have short active residual periods. This is the common time for animals to pull back turf in search of a meal, destroying lawns in their path. The life cycle of the Chafer Beetle lasts one year with new eggs hatching in July pending weather conditions. Home lawn areas in Pennsylvania often are subject to severe and extensive injury (Fig. They must be applied to a wet lawn on a cloudy evening. 11 0 obj <> endobj Watering in the areas previously sampled is advantageous to preventing the area from drying out and dying. We need to remember that these nematodes are living, breathing organisms, and they need special handling in their storage and shipment. They infect grubs 48 hours after application and will kill them 2 weeks after infecting them. Please note that all products should be irrigated in after treatment according to specific label directions. They include the Japanese beetle, May and June beetle, masked chafer, green June beetle, European chafer, Asiatic garden beetle, oriental beetle, and black turfgrass ataenius. 0000022079 00000 n Error. Each species has slightly different behavior patterns and some are more vulnerable to various management approaches than others. �_�H�I�A��Q���R1�!��}��N#u������p����i:^������?�k3�a.�緹/͡��f�m�c�xV�SwY>�|����ZNO�xnV��������u~on�,o�1e>N/7��y��v��)�2]�u������]�w���>>ֲ����P^/]_�nz)�7���f7��fU���WWw:�z������^o7�%l�-aK�*���'�B� Live grubs are not always cooperative, but with practice you can find the features. 0000024665 00000 n Likewise, the adults have dark chocolate brown heads that shade to a light brown (masked appearance). Males and females are a uniform tan or light brown color. 0000007251 00000 n European chafer this fall than for the previous two falls. usually perform better against white grubs than Steinernema spp. 0000006346 00000 n This means non-irrigated turf as in home and Nematodes are microscopic round worms, a naturally occurring organism. The Hererorhabditis bacteriophora is a nematode which moves through the soil. Healthy lawns are better able to withstand some damage from small amounts of grubs. Native scarab beetles can be plant pests but don’t tend to cause the extreme and rapid damage to turf 0000025207 00000 n 0000021748 00000 n Thus, you should not apply an insecticide treatment before or after applying milky disease. We also have found European chafer grubs in samples collected around the Berkshires with reports of this species in southern New Hampshire. trailer 0000002297 00000 n 0000022404 00000 n 0000017383 00000 n The European chafer (Rhizotrogus majalis) has been spreading through parts of New England during the past 15 or 20 years. Examine the soil, thatch (excess grass cuttings and debris), and turf thoroughly for grubs. Figure 3b. 3). Several other white grub species including Asiatic garden beetle, European chafer, green June beetle, May and June beetles, and Oriental beetle are occasionally observed in home lawns and may cause significant damage. If you count 5-10 grubs in one square foot of lawn area, you have a problem. Japanese beetle life cycle; Image created for Paul Heller. You may need to obtain a watering permit from your municipality. Those spines often have a very distinctive pattern. 0000008595 00000 n By entering your email, you consent to receive communications from Penn State Extension. %PDF-1.6 %���� These include the Ten-lined June beetle (Polyphylla decemlineata) and other June beetles, Phyllophaga species in the Scarabaeidae family. European Chafer, Asiatic Garden Beetle, Oriental Beetle, Black Turfgrass Ataenius) There are 8 different white grubs that are commonly known to cause turfgrass plant damage. Research results with insect parasitic nematodes to curatively suppress white grubs have not been consistent. 0000017926 00000 n Masked chafer beetles with eggs. Home lawns, golf courses, and turf growers have the potential to be most significantly impacted if the European chafer beetle were to become established in … The European Chafer grubs are distinguished from other white grubs by the "Y"-shaped anal slit and by the parallel rows of spines on their raster. 0000026293 00000 n However, remember that moles also feed on earthworms or insects living on shallow tree roots. 2). Full-grown third-instar Japanese beetles and northern masked chafer grubs average slightly over one inch in length. European Chafer: The European chafer adult is a small golden tan to light brown beetle, oval in shape, about 1/2" long. 0000003342 00000 n When the turf is lifted to expose the grubs, they usually will be lying on their sides in a C-shaped position (Fig. 86 0 obj <>stream Using a garden spade, remove one square foot of turf and soil (two to four inches deep) at several locations. European Chafer:The European chafer adult is a small golden tan to light brown beetle, oval in shape, about 1/2" long. ����uH���s�;���v!�t�{�5�X$������4w` `����� �"O(f`fb�d0���3� ��X�0�c�>���)�a"C�c�9L{�P~�����0�A%�����Xo0LaPm,�z�hˠv���&�.�FK�� b� This extra care carries through to the application. 0000006693 00000 n 0000019617 00000 n 0000025410 00000 n

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