ISSN:
1612-4766
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
,
Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
Notes:
Abstract On the hourly activity of certain Lepidopterous cotton pests as indicated by light-trap catches. The curves illustrating the hourly catches in an ultra violet trap of six species of cotton insect pests indicate the following: The cotton leaf-worm mothsSpodoptera littoralis are active all the night, with two distinct peaks, the first about 3 hours after sunset and the second about 3 hours before sunrise. The lesser cotton leaf worm mothsSp. exigua are mainly active during the second half of the night. The pink boll wormPectinophora gossypiella, the spiny boll worm.Earias insulana and the American boll wormHeliothis zea are, as a rule, more active during the first half of the night. Their activity diminishes gradually after midnight. Within the three species, the curve representingH. zea maintains an intermediate position between those ofP. gossypiella andE. insulana. The pattern of night activity of the cutworm,Agrotis ypsilon, resembles those of the three boll-worms.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF01867152
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