New Zealand Plant Protection 55 (2002): 80-84
A carbosulfan insecticide to protect pine seedlings from Hylastes ater (Coleoptera: Scolytidae) damage
S.D. Reay and P.J. Walsh
ABSTRACT
A controlled release granular carbosulfan pesticide was tested for efficacy against Hylastes ater damage of Pinus radiata seedlings in second-rotation forests in the central North Island. Our study involved control seedlings and seedlings treated with 10 g or 15 g carbosulfan granules per seedling. Seedling mortality ranged from 0 to 8% at the five sites. When seedling mortality was high (8%), mortality was reduced to 0.7% and 0% for carbosulfan granules applied at 10 g/seedling and 15 g/seedling respectively. While seedling mortality in the five sites was low, a large proportion of seedlings were damaged (38 to 83% of untreated seedlings) by H. ater. Untreated seedlings were damaged more frequently and with greater severity than treated seedlings. The results indicate that that carbosulfan should protect P. radiata seedlings from damage caused by H. ater when used at the recommended field rate.
Keywords: Hylastes ater, carbosulfan insecticide, Pinus radiata, seedling mortality.
Copyright © 2002 New Zealand Plant Protection Society (Inc.).
Refer to the terms of use.
© 2007 New Zealand Plant Protection Society (Inc.)