[Evaluation of Hyalospila ptychis (Dyar) (Lepidoptera: Phycitidae) damage in coconut palm].
The aim of this study was to evaluate the losses provoked by the moth Hyalospila ptychis (Dyar) on green-dwarf coconut trees at Una, State of Bahia, Brazil. Inflorescences of 100 trees were inspected monthly, from April 1997 to March 1998, in a 15 ha orchard. The number of coconuts per inflorescence, fruits damaged by H. ptychis, and fruit losses due to other causes, were recorded. The number of nuts per inflorescence followed a seasonal variation. The average losses caused by the pest were around 2% of the coconuts and the proportion of losses due to other causes was 59,4%. The number of coconuts lost for other causes and attacked by H. ptychis followed the seasonal variation of the number of fruits per inflorescence. The percent of coconuts attacked by H. ptychis was significantly and positively correlated with monthly average temperature.
Moura
José I L
JI
Estação Experimental Lemos Maia / CEPLAC, Una, BA. jinacio@bitsnet.com.br
Sgrillo
Kátia R P A
KR
Cazorla
Irene M
IM
Sgrillo
Ricardo B
RB
Delabie
Jacques H C
JH
D000383:Agriculture / Q000706:statistics & numerical data; D000818:Animals; D003059:Cocos; D009036:Moths; D010935:Plant Diseases / Q000469:parasitology*