Major Mortality Factors in the Population Dynamics of the Diamondback Moth, <i>Plutella maculipennis</i> (Curt.) (Lepidoptera: Plutellidae)

Harcourt, D. G.

doi:10.4039/entm9532055-1

Cited by 88 publications

(84 citation statements)

References 16 publications

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“…Previous studies of population dynamics of DBM based on the life table analysis have revealed that many DBM larvae were killed in the early stages (Harcourt, 1963;Iga, 1985;Sivapragasam et al, 1988), but, the main factor was different in each study. Iga (1985) suggested that natural enemies played an important role in regulating DBM populations.…”

Section: Introductionmentioning

confidence: 94%

“…Values followed by same letters are not significantly different (pϽ0.05). Harcourt (1963), Sivapragasam et al (1988) and Wakisaka et al (1991) focused on the effects of rainfall on DBM populations. Their results suggested that rain affects a DBM population, but their study has not adequately considered rain quality (precipitation and drop size).…”

Section: ]})mentioning

confidence: 99%

“…Iga (1985) suggested that natural enemies played an important role in regulating DBM populations. However, Harcourt (1963) and Sivapragasam et al (1988) focused on the effects of rainfall on DBM populations. Wakisaka et al (1991) developed a life table analysis of DBM and used water sprinkling in order to evaluate the effects of precipitation on DBM eggs on the surface of leaves.…”

Section: Introductionmentioning

confidence: 99%

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Effect of rainfall on a population of the diamondback moth, Plutella xylostella (Lepidoptera: Plutellidae)

Kobori

Amano

2003

Appl. Entomol. Zool.

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The present study was carried out under artificial rainfall conditions to determine the details of rainfall effect on a DBM population on cabbage. Although most DBM eggs laid on the upper leaf surface were washed off with precipitation of 17.3 mm in 1 h with drops of 2.5 mm in diameter, few eggs laid on the lower surface were washed off. Under the same rain conditions as for the eggs, the falling rate of larvae decreased with advancing larval stadium except for the 1st larval stage. The number of falling larvae increased with increasing treatment time, and the effect reached a ceiling in about 1 h. With increasing time of exposure to hard rain, there occurred a similar increase in the falling rate of DBM larvae. Even after 1 h of steady rainfall, complete removal of the larvae was not achieved. When either the density of droplet was increased or the period of rain was extended, the falling rate for 3rd stadium larvae increased. When droplet diameter increased and the total amount of rainfall remained constant, there was an increase in the number of fallen larvae.

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Section: Introductionmentioning

confidence: 94%

Section: ]})mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Effect of rainfall on a population of the diamondback moth, Plutella xylostella (Lepidoptera: Plutellidae)

Kobori

Amano

2003

Appl. Entomol. Zool.

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“…Field life-tables and key mortality factors may be analysed to determine what stage in the life cycle contributes the most to the population trend when series of lifetables are available (Deevey 1947;Harcourt 1963Harcourt , 1969Atwal and Bains 1974). The use of field life-tables have been made recently for studying the natural population of insect pests.…”

Section: Introductionmentioning

confidence: 99%

Field life-tables and key mortality factors ofAchaea janata Linn on castor

Gaikwad

Bilapate

1989

Proc. Indian Acad. Sci. (Anim. Sci.)

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Field life-tables and key mortality factors of castor semilooper Achaea janata L. were studied on castor for the year 1985-86 and 1986-87. There were 4 regular overlapping generations during both the years. The parasitization of Achaea janata larvae in early instars (I-III instar) by parasite Microplitis maculipennis (Sziepligetis) was 1,34, 4,41, 22·02 and 43·70% in first, second, third and fourth generation respectively during 1985-86. Similarly, the parasitization by same parasite was 44'12, 61'46 and 65·55% during second, third and fourth generation respectively in the year 1986-87. Key mortality factors and separate budget for each generations were prepared.

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“…Harcourt (1963) had proposed the criteria for filling the data in the life-table for each age interval (stage). The same criteria were used in this study.…”

Section: Preparation Of Life Tablesmentioning

confidence: 99%

Field Life-Tables and Key Mortality Factors of Plutella xylostella Infesting Sole and Onion Intercropped Cabbage

Aravindarajan¹,

Dhandge²,

Anandmurthy³

et al. 2017

Int.J.Curr.Microbiol.App.Sci

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Major Mortality Factors in the Population Dynamics of the Diamondback Moth, Plutella maculipennis (Curt.) (Lepidoptera: Plutellidae)

Cited by 88 publications

References 16 publications

Effect of rainfall on a population of the diamondback moth, Plutella xylostella (Lepidoptera: Plutellidae)

Effect of rainfall on a population of the diamondback moth, Plutella xylostella (Lepidoptera: Plutellidae)

Field life-tables and key mortality factors ofAchaea janata Linn on castor

Field Life-Tables and Key Mortality Factors of Plutella xylostella Infesting Sole and Onion Intercropped Cabbage

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