Effects of Constant and Alternating Temperatures on the Development of Spodoptera litura F. : Lepidoptera : Noctuidae

Miyashita, Kazuyoshi

doi:10.1303/aez.6.105

Cited by 31 publications

(19 citation statements)

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“…But, significant differences were observed between constant and alternating temperature at mean temperature 20°C . Miyashita showed that the development of S. litura larvae and pupae tended to be faster under alternating temperatures . The main purpose of this study was not to determine the development rate at constant and fluctuating temperature around the same mean temperature.…”

Section: Discussionmentioning

confidence: 90%

“…But, significant differences were observed between constant and alternating temperature at mean temperature 20 • C. 23 Miyashita showed that the development of S. litura larvae and pupae tended to be faster under alternating temperatures. 24 The main purpose of this study was not to determine the development rate at constant and fluctuating temperature around the same mean temperature. Instead, our intention was to collect the life table data under constant temperature indoors and compare these results with those obtained under realistic field conditions in the spring and fall to determine whether the results could be feasibly used in an effective pest control program.…”

Section: Discussionmentioning

confidence: 99%

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Population and damage projection of Spodoptera litura (F.) on peanuts (Arachis hypogaea L.) under different conditions using the age‐stage, two‐sex life table

Tuan

Lee

Chi

2013

Pest Management Science

308

129

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Section: Discussionmentioning

confidence: 90%

Section: Discussionmentioning

confidence: 99%

Population and damage projection of Spodoptera litura (F.) on peanuts (Arachis hypogaea L.) under different conditions using the age‐stage, two‐sex life table

Tuan

Lee

Chi

2013

Pest Management Science

308

129

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“…They do not enter diapause in any of the developmental stages (Miyashita, 1971). In western Japan, the larvae are sometimes observed in fields by early summer, but gener ally outbreaks occur near autumn.…”

Section: Introductionmentioning

confidence: 99%

Utilization of lipid for flight and reproduction in Spodoptera litura (Lepidoptera: Noctuidae)

Murata¹,

Tojo²

2002

Eur. J. Entomol.

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Abstract. Research of the physiological traits of a long-distance migratory insect, the common cutworm Spodoptera litura, in rela tion to flight and reproduction, was focused on triacylglycerol (TG) levels and their fatty acid composition.Tethered flight experiments demonstrated that three-day old male moths can fly more than 20 h. Among eight identified fatty acids of which the adult TG is composed, the ratios of the following unsaturated fatty acids, palmitoleic acid (C 16:1), oleic acid (C 18:1), linoleic acid (C 18:2) and linolenic acid (C 18:3), gradually declined with longer flight duration. On the other hand, the TG levels of non-flown males reared for ten days on only water, were the same as those of three-day old males after 12 hr of flight, but the ratios of these unsaturated fatty acids in TG's remained nearly unchanged. These results suggest that the unsaturated fatty acids in TG are mainly used as a flight energy source.As ovarian development in females of this species occurs shortly after adult emergence, long-distance migratory capacity has been regarded as highly unlikely. In fact, ovarian development was completed within three days after adult emergence and females laid eggs thereafter. During this three day period TG increased in the ovary, accompanied by increasing ratios of unsaturated fatty acids in the TG's and the ovary eventually occupied most of the abdomen, in spite of a nearly constant level of TG in the abdomen and unchanged ratio of its unsaturated fatty acids. These facts support the transfer of TG from the fat body to the ovary, and further suggest that the mature females utilize the TG deposited in the ovaries as a flight energy source. Then if they migrate a long distance, they use residual TG after flight for egg production.

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“…This could be explained by the fact that in the laboratory, much "softer" larval rearing conditions are provided than are present in the field. A second advantage of the use of alternating temperature is that it is less likely to induce diapause than a constant temperature of 16.6"C. Finally under conditions of equivalent mean temperatures the development is generally faster under alternating conditions (Hagstrum and Hagstrum 1970;Miyashita 1971;Siddiqui and Barlow 1972;Hagstrum and Leach 1973). As well as this difference between strains for larval survival there was also a beneficial effect of alternating temperature in the context of producing larger pupae; this is important as regards the internal quality of the laboratory strain.…”

Section: November 1979mentioning

confidence: 99%

DIRECT, INDIRECT, AND RESIDUAL TOXICITIES OF INSECTICIDE SPRAYS TO WESTERN SPRUCE BUDWORM, CHORISTONEURA OCCIDENTALIS (LEPIDOPTERA: TORTRICIDAE)

Robertson

Rappaport

1979

Can Entomol

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Can. Ent. 111: 1207Ent. 111: -1217Ent. 111: (1979 The effect of an alternating and a constant temperature regime on some aspects of the biology of two strains of Hylemya antiqua were studied. One strain was a laboratory strain, the other a newly colonized wild strain. Several population statistics were assessed and life tables constructed. Significant differences between the strains were recorded.The laboratory strain mated significantly better under both environments than the wild strain, it also oviposited earlier and lived longer. No difference between the strains was recorded for either total egg production or oviposition rate. The wild strain larvae survived significantly better than the laboratory strain larvae and produced larger pupae. As the weighted mean temperature of the alternating regime was 16.6"C compared with the constant regime of 23°C many temperature dependent processes were retarded. Nevertheless as the alternating temperature increased larval survival and increased pupal size, this temperature regime has now been adopted for the routine laboratory rearing of H. antiqua larvae. The net reproductive rate, R,, and the intrinsic rate of increase, r, were calculated for both strains in both environments. The wild flies had the highest R , at the alternating temperature and the lowest at the constant temperature. This trend was completely reversed when r was calculated as this statistic takes into account generation time, which was much shorter in the constant temperature.The results were discussed in the framework of the quality of the laboratory stock in relation to its use in a genetic control programme.

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Effects of Constant and Alternating Temperatures on the Development of Spodoptera litura F. : Lepidoptera : Noctuidae

Cited by 31 publications

References 1 publication

Population and damage projection of Spodoptera litura (F.) on peanuts (Arachis hypogaea L.) under different conditions using the age‐stage, two‐sex life table

Population and damage projection of Spodoptera litura (F.) on peanuts (Arachis hypogaea L.) under different conditions using the age‐stage, two‐sex life table

Utilization of lipid for flight and reproduction in Spodoptera litura (Lepidoptera: Noctuidae)

DIRECT, INDIRECT, AND RESIDUAL TOXICITIES OF INSECTICIDE SPRAYS TO WESTERN SPRUCE BUDWORM, CHORISTONEURA OCCIDENTALIS (LEPIDOPTERA: TORTRICIDAE)

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