The Effect of Temperature and Water Chemistry on the Life-Cycle of Planaria torva (Muller) (Turbellaria: Tricladida)

10.2307/3482 ◽  
1972 ◽  
Vol 41 (2) ◽  
pp. 487 ◽  
Author(s):  
A. D. Sefton ◽  
T. B. Reynoldson
Keyword(s):  
Life Cycle ◽  
Water Chemistry ◽  
Effect Of Temperature ◽  
Planaria Torva

Effect of temperature on the development of free-living adults of Strongyloides papillosus (Wedl, 1856)

Parasitology ◽  
1963 ◽  
Vol 53 (3-4) ◽  
pp. 483-489 ◽  
Author(s):  
Premvati
Keyword(s):  
Life Cycle ◽  
Effect Of Temperature ◽  
Optimum Temperature ◽  
Free Living ◽  
Laboratory Conditions ◽  
Humidity Chamber

Strongyloides papillosus is found to be very common in the Lucknow area where 90% of the sheep are infected. The life-cycle is predominantly indirect, or heterogonic. The development of mature free-living adults takes place between 20° and 37° C., and 34° C. is the optimum temperature. At a temperature of 25° C., the percentage of free-living adults is 60–65 in summer (March to November) and practically 100 in winter (December to February). Immature females can develop at 40° C. in summer, but not in winter, under laboratory conditions.Inhibition experiments in a hot oven incubator with varying percentages of humidity, and in a humidity chamber incubator with constant 100% humidity, maintained at temperatures varying from 40° to 50° C., show that in the humidity chamber incubator mature free-living adults develop at 34° C. after incubation for 12 hr. at 40° C., after 4 hr. at 42° C., after 2 hr. at 45° C. and after 15 min. at 50° C. The hot oven incubator allows mature free-living adults to develop at 34° C. after 8 hr. at 40° C., after 2 hr. at 42° C., after 1 hr. at 45° C. and after 15 min. at 50° C.

scholarly journals Harmfulness of Delia antiqua (Diptera: Anthomyiidae) in Garlic in Southeast and Central Moravia

2016 ◽  
Vol 64 (3) ◽  
pp. 871-876
Author(s):  
Eva Sapáková ◽  
Hana Šefrová ◽  
Lea Hasíková ◽  
Luděk Hřivna
Keyword(s):  
Life Cycle ◽  
Effect Of Temperature ◽  
Delia Antiqua ◽  
Laboratory Conditions ◽  
Study Plot ◽  
First Occurrence

The aim of the three year research was to determine the first occurrence of Delia antiqua (Meigen, 1826) (Diptera: Anthomyiidae), specify its bionomics, compare its harmfulness on different garlic varieties, find out the effect of temperature on their life cycle and how their abundance influences garlic yield in regional agriculture areas traditionally growing garlic such as southeast and central Moravia. There was a significantly higher infestation of Delia antiqua on the edge (32.3 larvae) of study plot than in the middle (16.3 larvae) from 2010 to 2012. Intensive laying eggs of D. antiqua takes place between 9–11 a.m. and 16–18 p.m. hours at the edges of the study plot. The highest number of laid eggs was of 28 per one plant in Nedakonice. The development lasted 15 days at 21 °C under laboratory conditions.

scholarly journals Pengaruh Suhu Terhadap Siklus Hidup Lalat Buah (Drosophila melanogaster)

2019 ◽  
Vol 5 (2) ◽  
pp. 114-120
Author(s):  
Suharsono Suharsono ◽  
Egi Nuryadin
Keyword(s):  
Drosophila Melanogaster ◽  
Life Cycle ◽  
Quantitative Analysis ◽  
Light Intensity ◽  
Block Design ◽  
Fruit Flies ◽  
Effect Of Temperature ◽  
Fast Time ◽  
Randomized Block Design ◽  
Time Required

Fruit flies (Drosophila melanogaster) generally have four phases in their life cycle, namely eggs, larvae, pupae and imago. In general, Drosophila melanogaster experiences a life cycle of 8-11 days at optimal temperatures. At lower temperatures the time required to complete its life cycle is relatively longer and slower which is around 18-20 days. Whereas at higher temperatures adult flies that grow will be sterile. The development period of Drosophila melanogaster in its life cycle is influenced by several factors, namely ambient temperature, food availability, level of maintenance density and light intensity. This study aims to determine the effect of temperature on the life cycle of fruit flies (Drosophila melanogaster). The study will be analyzed using quantitative analysis using randomized block design (RBD) with six temperature difference treatments for each treatment and repeated 4 times so that there are 24 experiments. The results showed the development in the Drosophila melanogaster cycle starting from Egg - Larva (Instar I) - Larva (Instar II) - Larva (Instar III) - Pre Pupa - Pupa - Imago. The life cycle of Drosophila melanogaster has an average of 42.08 hours or 1.75 days up to 79.96 hours or 3.33 days in each treatment. And obtained a fast time during the life cycle of Drosophila melanogaster at a temperature of 30°C is 10.47 days and the longest at a temperature of 18°C is 18.35 days.

scholarly journals Effect of Temperature on Cortical Infection by Plasmodiophora brassicae and Clubroot Severity

2011 ◽  
Vol 101 (12) ◽  
pp. 1424-1432 ◽  
Author(s):  
Kalpana Sharma ◽  
Bruce D. Gossen ◽  
Mary Ruth McDonald
Keyword(s):  
Life Cycle ◽  
Brassica Rapa ◽  
Plasmodiophora Brassicae ◽  
Consistent Pattern ◽  
Effect Of Temperature ◽  
Symptom Development ◽  
Root Cortex ◽  
Brassica Crops ◽  
Resting Spores ◽  
Cortical Infection

A study was conducted to assess the effect of temperature on infection and development of Plasmodiophora brassicae in the root cortex of Shanghai pak choy (Brassica rapa subsp. chinensis) and on subsequent clubroot severity. Ten-day-old seedlings were grown individually, inoculated with resting spores, and maintained in growth cabinets at 10, 15, 20, 25, and 30°C. Seedlings were harvested at 2-day intervals, starting 8 days after inoculation (DAI) and continuing until 42 DAI. Roots were assessed at 4-day intervals for the incidence of cortical infection and stage of infection (young plasmodia, mature plasmodia, and resting spores), at 2-day intervals for symptom development and clubroot severity, and at 8-day intervals for the number of spores per gram of gall. Temperature affected every stage of clubroot development. Cortical infection was highest and symptoms were observed earliest at 25°C, intermediate at 20 and 30°C, and lowest and latest at 15°C. No cortical infection or symptoms were observed at 42 DAI in plants grown at 10°C. A substantial delay in the development of the pathogen was observed at 15°C. Resting spores were first observed at 38 DAI in plants at 15°C, 26 DAI at 20 and 30°C, and 22 DAI at 25°C. The yield of resting spores from galls was higher in galls that developed at 20 to 30°C than those that developed at 15°C over 42 days of assessment. These results support the observation in companion studies that cool temperatures result in slower development of clubroot symptoms in brassica crops, and demonstrate that the temperature has a consistent pattern of effect throughout the life cycle of the pathogen.

scholarly journals Effect of Temperature on the Life Cycle ofLydella jalisco(Diptera: Tachinidae), a Parasitoid ofEoreuma loftini(Lepidoptera: Pyralidae)

2002 ◽  
Vol 31 (3) ◽  
pp. 432-437 ◽  
Author(s):  
Isabelle Lauzière ◽  
Mamoudou Setamou ◽  
Jesusa Legaspi ◽  
Walker Jones
Keyword(s):  
Life Cycle ◽  
Effect Of Temperature ◽  
Lepidoptera Pyralidae
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