QUANTITATIVE RELATIONSHIP BETWEEN CONSUMPTION AND EXCRETION BY LARVAE OF PSEUDALETIA UNIPUNCTA (LEPIDOPTERA: NOCTUIDAE)

1973 ◽  
Vol 105 (3) ◽  
pp. 491-492 ◽  
Author(s):  
M. K. Mukerji ◽  
J. C. Guppy
Keyword(s):  
Food Consumption ◽  
Dry Matter ◽  
Larval Instar ◽  
Caloric Intake ◽  
Quantitative Relationship ◽  
Regression Coefficients ◽  
Pseudaletia Unipuncta ◽  
Larval Stages ◽  
Lepidoptera Noctuidae

AbstractHigh correlations between food consumption and excretion in terms of dry matter, calories, lipids, and nitrogen were obtained during the larval stages of Pseudaletia unipuncta (Haw.). The regression coefficients for this relationship in terms of dry matter did not differ significantly from those of calories; this leads to the hypothesis that the ratio of food consumption and excretion in terms of dry matter in a particular larval instar provides an estimate of caloric intake.

A QUANTITATIVE STUDY OF FOOD CONSUMPTION AND GROWTH IN PSEUDALETIA UNIPUNCTA (LEPIDOPTERA: NOCTUIDAE)

1970 ◽  
Vol 102 (9) ◽  
pp. 1179-1188 ◽  
Author(s):  
M. K. Mukerji ◽  
J. C. Guppy
Keyword(s):  
Food Intake ◽  
Food Consumption ◽  
Quantitative Study ◽  
Reproductive Potential ◽  
High Rate ◽  
Pseudaletia Unipuncta ◽  
Daily Growth ◽  
Accelerate Development ◽  
Two Stages ◽  
Lepidoptera Noctuidae

AbstractLarvae of Pseudaletia unipuncta (Haw.), reared on corn foliage, were found to vary in the rate they were able to feed, grow, and attain maturity. Mortality varied inversely with the rate of food intake. In the fifth and sixth instars, there was a direct linear relationship between rate of food intake and daily growth, and rate of food intake and daily development. A variance of 78 to 96% in final weights of the two stages was explained by the combined effect of initial weights of larvae, food supply, duration of feeding, and food ingested. Fecundity increased with the rate of food intake of the larvae.When P. unipuncta feeds at a high rate, it is able to accelerate development, increase growth, and maintain a high reproductive potential. When the rate of food intake is low, development, growth, and fecundity are reduced for the sake of survival.

Quantitative Relationship Between Consumption and Excretion of Dry Matter by Larvae of the Pale Western Cutworm, Agrotis orthogonia Morr. (Lepidoptera: Noctuidae)

1962 ◽  
Vol 94 (4) ◽  
pp. 441-443 ◽  
Author(s):  
R. Kasting ◽  
A. J. McGinnis
Keyword(s):  
Dry Matter ◽  
Nutritional Value ◽  
Quantitative Relationship ◽  
Fecal Pellets ◽  
Relative Consumption ◽  
Quantitative Measurements ◽  
Golden Ball ◽  
The Relationship ◽  
Lepidoptera Noctuidae ◽  
Food Consumed

The quantities of excreta produced by aphids (Auclair, 1957) and locusts (Dadd, 1960) have been used to estimate the relative consumption of different food materials. Likewise the quantities of food consumed by some other insects have been conveniently estimated by counting fecal pellets (Thorsteinson, 1953; Ito, 1960). Ito (1960) stated without supporting data “there is a highly significant correlation between the amount of mulberry leaves ingested and numbers of feces produced”. Nevertheless there appear to be no published quantitative measurements made on individual insects that show the relationship between the quantities of food consumed and excreta passed. This note gives the relationship between the quantities of dry matter (D. M.) consumed and excreted for three larval instars of the pale western cutworm, Agrotis orthogonia Morr., fed two varieties of etiolated wheat sprouts, Thatcher (Triticum aestivum L. emend Thell.) and Golden Ball (T. durum Desf.). In addition the relationship between D. M. consumed and numbers of fecal pellets produced or D. M. excreted by fifth-instar larvae were determined for two diets that differed considerably in nutritional value.

COLD TOLERANCE OF PSEUDALETIA UNIPUNCTA AND PERIDROMA SAUCIA (LEPIDOPTERA: NOCTUIDAE)

1985 ◽  
Vol 117 (8) ◽  
pp. 1055-1060 ◽  
Author(s):  
G.L. Ayre
Keyword(s):  
Cold Tolerance ◽  
Genetic Differences ◽  
Immature Stages ◽  
Egg Survival ◽  
Pseudaletia Unipuncta ◽  
Canadian Prairies ◽  
Peridroma Saucia ◽  
Larval Stages ◽  
Cold Tolerant ◽  
Lepidoptera Noctuidae

AbstractPupae and 3rd-instar larvae of Pseudaletia unipuncta (Haw.) survived longer at 0 and −2°C than other immature stages, and insects reared at 15°C were more cold tolerant than those reared at 20°C. Egg survival at 0°C varied greatly among replicates suggesting genetic differences among females. No adults survived 2 weeks at 0°C. Peridroma saucia (Hub.) would not rear satisfactorily at 15°C and, other than eggs, all stages tested were from rearings at 20°C. Eggs from adults at 15°C were more cold tolerant than those from adults at 20°C. There were no differences in survival among any of the larval stages or pupae. Some adults survived 6 weeks at 0°C. No stage of either species survived over 8 weeks at 0°C nor 4 weeks at −2°C indicating that overwintering on the Canadian prairies is unlikely.

The Relation of Oxygen Consumption to Body Size and to Temperature in the Larvae of Chironomus Riparius Meigen

1958 ◽  
Vol 35 (2) ◽  
pp. 383-395
Author(s):  
R. W. EDWARDS
Keyword(s):  
Oxygen Consumption ◽  
Body Size ◽  
Dry Matter ◽  
Larval Instar ◽  
Weight Ratio ◽  
Dry Weight ◽  
Chironomus Riparius ◽  
Consumption Rates ◽  
Rate Of Oxygen Consumption ◽  
Wet Weight

1. The oxygen consumption rates of 3rd- and 4th-instar larvae of Chironomus riparius have been measured at 10 and 20° C. using a constant-volume respirometer. 2. The oxygen consumption is approximately proportional to the 0.7 power of the dry weight: it is not proportional to the estimated surface area. 3. This relationship between oxygen consumption and dry weight is the same at 10 and at 20° C.. 4. The rate of oxygen consumption at 20° C. is greater than at 10° C. by a factor of 2.6. 5. During growth the percentage of dry matter of 4th-instar larvae increases from 10 to 16 and the specific gravity from 1.030 to 1.043. 6. The change in the dry weight/wet weight ratio during the 4 larval instar supports the theory of heterauxesis. 7. At 20° C., ‘summer’ larvae respire faster than ‘winter’ larvae.

Sex pheromone of the armyworm,Pseudaletia unipuncta (Haworth) (Lepidoptera: Noctuidae)

1980 ◽  
Vol 6 (3) ◽  
pp. 565-572 ◽  
Author(s):  
L. M. McDonough ◽  
J. A. Kamm ◽  
B. A. Bierl-Leonhardt
Keyword(s):  
Sex Pheromone ◽  
Pseudaletia Unipuncta ◽  
Lepidoptera Noctuidae

scholarly journals Efficacy of Bacillus thuringiensis (Berliner) isolates on fig moth, Ephestia cautella (Walker) Larvae

2014 ◽  
Vol 11 (2) ◽  
pp. 943-951
Author(s):  
Baghdad Science Journal
Keyword(s):  
Bacillus Thuringiensis ◽  
Larval Stage ◽  
Filter Paper ◽  
Larval Instar ◽  
Ephestia Cautella ◽  
Larval Stages ◽  
The Third ◽  
Total Percentage ◽  
First Instar ◽  
Paper Method

The following dilution 5×10-1, 10-1, 10?2 , 10-3 gm/L for the indigenous isolate of Bacillus thuringiensis bacteria and the commercially isalate were used for experiments against the different stages of fig moth of E.cautella which exposed by filter paper method. The results showed that mortality of larval stages was increased with the increasing concentration of the biocide, in addition to increase in the mortality of the larval stages reached to the highest percentage in the third days of treatment of the larval stage in comparison with the first and second days of exposure. The results also showed that the sensitivity of larval stages was increased in first and second instars while reduced in the last instars .The high percentage of first instar mortality for the indigenous isolate in the concentration of 5×10-1 was 72.8% , while the low percentage of mortality showed in the concentration of 5×10-1 for the fifth instar larvae which was 13.3% in third days of treatment while a high percentage of mortality was showed for the first instar larvae for the commercially isulate in the concentration of 5×10-1 was 59.4% Furthermore, low percentage of mortality was shown in the concentration of 5×10-1 in fifth instar larval which was 8.3% in the third days of treatment. The results also showed that the indigenous isolated was more effective than the commercially produced bacteria for killing larval instars of fig moth E.cautella .The total percentage of larval instar mortality reached to 44.5 % after the third days of treatment in concentration 5×10-1 in the indigenous isolate , and it was 33.8 % in the commercially produced bacteria .

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