scholarly journals REPRODUCTIVE INTERPRETATION OF SOME BREVIPALPUS SPECIES ON TWO TEMPERATURES DEGREE, USING LIFE TABLE PARAMETERS

2021 ◽  
Vol 21 (No 1) ◽  
Author(s):  
Ebrahim A. A ◽  
Abdallah A. A. M. ◽  
Halawa A.
Keyword(s):  
Life Table ◽  
Pure Culture ◽  
Citrus Fruit ◽  
Navel Orange ◽  
Life Table Parameters ◽  
Suitable Host ◽  
Rapid Spread ◽  
Increase Rate ◽  
Different Temperatures ◽  
Two Temperatures

Genus Brevipalpus is considered one of the most important genera that belong to family Tenuipalpidae Berlese. In Egypt, Brevipalpus includes seven species solely, five of them are attacking citrus trees. B. phoenicis, B. californicus and B. noranae are the most dominant on Egyptian citrus. A pure culture of the three specieswere propagated on leaves of Common Navel orange variety. The mentioned species were studied at two different temperatures (25 and 30°C ± 2°C and 70 ± 5% R.H.). The obtained results enable us to conclude that between the three species of genus Brevipalpus, the citrus fruit most appropriate for the development of B. noranae, since the mite presents a reduced embryonic and post-embryonic period. The citrus fruit also provides the highest values of specific fertility, survival and of the intrinsic increase rate (rm), which indicates it as being a better suitable host for the mite which provide B. noranae to establish and rapid spread.

scholarly journals Determining the Effect of Temperature on the Growth and Reproduction of Lasioderma serricorne Using Two-Sex Life Table Analysis

Insects ◽  
2021 ◽  
Vol 12 (12) ◽  
pp. 1103
Author(s):  
Tao Wang ◽  
Yan-Ling Ren ◽  
Tai-An Tian ◽  
Zhi-Tao Li ◽  
Xing-Ning Wang ◽  
...  
Keyword(s):  
Life Table ◽  
Total Duration ◽  
Reproductive Rate ◽  
Oviposition Period ◽  
Effect Of Temperature ◽  
Economic Losses ◽  
Lasioderma Serricorne ◽  
Cigarette Beetle ◽  
Increase Rate ◽  
Different Temperatures

The cigarette beetle Lasioderma serricorne (Fabricius) is a major pest of stored products worldwide, especially tobacco and foods, causing huge economic losses. This study aimed to experimentally investigate the population dynamics of this pest at different temperatures and provide theoretical input for its control. Populations of L. serricorne were established under laboratory conditions at five temperatures (21 °C, 24 °C, 27 °C, 30 °C, and 33 °C). Results showed that an increasing temperature significantly affected the developmental time, longevity, oviposition period, and fecundity of L. serricorne. Both the longevity and fecundity of adult beetles were significantly reduced as the temperature increased. High temperatures significantly reduced the total duration of the preoviposition period but prolonged the oviposition period of L. serricorne. Increasing the temperatures from 21 °C to 33 °C significantly influenced the life table parameters of L. serricorne. The intrinsic increase rate (r), finite increase rate (λ), and gross reproductive rate (GRR) all increased with a greater rearing temperature, but mean generation time (T) was significantly shortened. To our best knowledge, this is the first report to detail the entire life history of the cigarette beetle in response to different temperatures when reared on tobacco dry leaves. This finding may provide basic information on the occurrence of L. serricorne in a warehouse setting and its mass rearing.

scholarly journals Effect of Different Temperatures on the Life Table Parameters of Rhyzobius Lophanthae Blaisdell (Coleoptera: Coccinellidae)

2021 ◽  
Author(s):  
Ali KAYAHAN ◽  
Qasim Hussein AHMED ◽  
İsmail KARACA
Keyword(s):  
Life Table ◽  
Optimum Temperature ◽  
Life Table Parameters ◽  
Generation Times ◽  
Different Temperatures ◽  
Total Productivity ◽  
The Mean ◽  
Reproductive Rates ◽  
Rhyzobius Lophanthae

Abstract The purple scale predator, Rhyzobius lophanthae Blaisdell (Coleoptera: Coccinellidae) is known as coccidophagous ladybird predator, and effective against scales’ insects. The present study aimed to evaluate the optimum temperature for the species to be more efficient. In this study, the life table parameters of R. lophanthae were determined on different temperatures at 4, 16, 18, 20, 22, 24, 26, 28, 30 and 32 °C and 60% RH, by calculations using RmStat-3 software according to Euler-Lotka equation. The results showed that the intrinsic rates of increase (rm) were 0.016, 0.022, 0.030, 0.052, 0.056, 0.068, 0.120, 0.142, 0.132, 0.021 females/females/day, respectively, while the net reproductive rates (R0) were 7.082, 9.514, 11.960, 50.906, 54.150, 49.525, 56.883, 80.944, 31.149, 1.882 females/females/generation, respectively. The mean generation times (T0) were 125.966, 104.602, 84.009, 75.742, 71.511, 57.568, 33.801, 30.866, 25.978, 30.759 days, respectively. Total productivity rates (GRR) were 34.865, 39.210, 48.216, 201.990, 209.469, 166.207, 177.779, 303.751, 105.751, 12.622 egg/female, respectively. The study concluded that 26-30 °C was the optimum temperature range for the efficient role of R. lophanthae under laboratory conditions. From the results, it is still needed to do more studies on the interactions of pests, predators with environmental conditions.

Sign in / Sign up

Export Citation Format

Share Document