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| Publication Type:
| Report |
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| Author(s): | Gelernter, Wendy;
Stowell, Larry |
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| Author Affiliation: | Editors, PTRI Turfgrass Research Report |
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| Title: | Predicting the timing of adult populations of the black turfgrass ataenius and the masked chafer using degree day models |
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| Section: | Insect management
Other records with the "Insect management" Section
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| Source: | PTRI 1998 Turfgrass Research Report. 1998, p. 64-72. |
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| Publishing Information: | San Diego, CA: PACE Turfgrass Research Institute |
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| # of Pages: | 9 |
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| Keywords: | TIC Keywords: Ataenius; Temperatures; Insects; Ataenius spretulus; Cyclocephala pasadenae
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| Abstract/Contents: | "A study was conducted to determine whether temperature, in the form of a degree-day model, could be utilized to more accurately predict when black turfgrass ataenius (BTA) and masked chafer adults would appear on golf courses, and therefore aid in insect management decisions. The model that was developed predicted the appearance of BTA adults with a range from 2 days before to 14 days after the actual peak was observed with black light trap data, which offers a better prediction than the previously developed calendar approach. In contrast, for masked chafers, a comparison of the degree-day approach vs. the calendar approach to predicting the occurrence of adults revealed that a calendar approach was much more precise. During 1994, 1995 and 1996, non-Desert courses had masked chafer peaks between 6/24 and 6/29, and Desert courses had peaks between 6/9 and 6/11. Preliminary data from 1997 suggests that these trends have occurred for a fourth year, leading us to expect the appearance of chafer adults every year during these time periods. Based on this data, preventive control measures for white grubs should be triggered by the appearance of the first peak of scarab beetle activity. In the Low Desert, this first active peak is for the masked chafer, and it occurs every year in the second week in June. Preventive insecticide applications should therefore be targeted soon after this initial chafer peak, in mid to late June. This application will also control emerging grubs of the BTA, which appear a few weeks after the masked chafer. Based on a comparison of the timing of masked chafer populations in the Low Desert vs. elsewhere in California, we believe that the species present outside of the Desert area, Cyclocephala pasadenae, is not the dominant species in the Desert. Instead, we propose that one and maybe two additonal species of Cyclocephala are the dominant species in the Desert. In all key respects other than timing of appearance and anatomy, these chafers appear to cause the same types of damage, and are controlled by the same types of insecticide products as C. pasadenae." |
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| Language: | English |
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| References: | 3
3 |
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| Note: | Cooperators: Ross O'Fee and Mike Kocour, The Springs Club; Cal Hardin, Morningside Country Club; Douglas Anderson, The Vintage Club; Chris Harvell, Nicklaus Private Course (PGA West)
Tables
Graphs |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Gelernter, W., and L. Stowell. 1998. Predicting the timing of adult populations of the black turfgrass ataenius and the masked chafer using degree day models. Turfgrass Res. Rep. p. 64-72. |
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MSU catalog number: SB 433 .P87 |
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