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- Title
Effect of tillage on abundance of Japanese beetle,Popillia japonicaNewman (Col., Scarabaeidae), larvae and adults in highbush blueberry fields.
- Authors
Szendrei, Z.; Mallampalli, N.; Isaacs, R.
- Abstract
At 15 commercial highbush blueberry farms, fields where row middles were tilled had 72% lower larval density ofPopillia japonicathan fields with grass in row middles.Popillia japonicalarval populations were similar in the perimeters of tilled and untilled fields. Soil parameters measured in these sites were not correlated with larval density ofP. japonica.Samples of adult beetles on bushes showed that they were significantly less abundant in tilled fields compared with fields with grass in the row middles. The abundance of larvae inside fields during the spring was significantly correlated with early, but not late summer abundance of adult beetles on bushes. Comparisons of different tillage timings showed that grassy plots between rows of blueberry bushes that were tilled in spring and kept bare all year round had lower abundance ofP. japonicalarvae than those that retained perennial ryegrass. The effect of tillage timing on larval abundance was not consistent across 2 years, but most timings caused similar reduction inP. japonicalarval density in the row middles. Tillage in the spring and in the autumn caused 50.5% and 68.8% reduction of larval density in each year respectively. These results indicate that tillage can reduceP. japonicalarval and adult abundance in highbush blueberry fields.
- Subjects
TILLAGE; BEETLES; BLUEBERRY industry; FARM management; DEVELOPMENTAL biology; POPILLIA
- Publication
Journal of Applied Entomology, 2005, Vol 129, Issue 5, p258
- ISSN
0931-2048
- Publication type
Article
- DOI
10.1111/j.1439-0418.2005.00961.x