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Effects of carrot developmental stages on feeding and oviposition of carrot weevil, Listronotus oregonensis (Le Conte) (Coleoptera: Curculionidae)



Effects of carrot developmental stages on feeding and oviposition of carrot weevil, Listronotus oregonensis (Le Conte) (Coleoptera: Curculionidae)



Environmental Entomology 17(2): 330-336



Adult feeding and oviposition punctures and subsequent larval feeding of the carrot weevil (CW), Listronotus oregonensis (Le Conte), did not decrease carrot stand significantly. CW started to oviposit by 147 +/- 9 degree-days (DD) (base 7 degrees C) and 90% of the eggs were deposited by 456 +/- 47 DD. However, females started to oviposit in carrot seedlings only when the carrots reached the four-true-leaf stage and 98% of the eggs were found on carrot leaf, petiole and crown. A significant inverse relation was found between the date of sowing and the number of eggs and subsequent damage at harvest. Carrots sown after 400-450 DD would escape most CW damage.

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Accession: 001580022

Download citation: RISBibTeXText

DOI: 10.1093/ee/17.2.330



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