Comparison of Life Table Parameters and Digestive Physiology of Rhyzopertha dominica (Coleoptera: Bostrichidae) Fed on Various Barley Cultivars

Abstract

In this study, the effect of 20 barley cultivars were evaluated on the life table parameters and digestive enzymatic activity of the lesser grain borer, Rhyzopertha dominica (F.) (Coleoptera: Bostrichidae) under laboratory conditions (28 ± 1°C, 60 ± 5% RH, and a photoperiod of 16:8 (L:D) h). Among barley cultivars tested developmental time of R. dominica immature stages was longest on cultivar Bahman (61.00) and shortest on Mahoor (46.60 d). The lowest realized fecundities were recorded for insects reared on cultivar Bahman (217.60); and the highest ones were observed for insects reared on Sahra (348.05 eggs/female). The net reproductive rate (R0) was significantly affected by various barley cultivars being lowest on cultivar Bahman (53.98) and highest on Mahoor (146.79 offspring/female). Records for intrinsic rates of increase (rm) were lowest on cultivar Dasht (0.043) and the highest on Mahoor (0.066 day−1). The highest levels of amylolytic and proteolytic activity were recorded on cultivars Mahoor and EBYT-92-10, respectively. By contrast, the insects reared on cultivars Dasht had the lowest levels of α-amylase and general protease activity. Correlation analyses showed that high correlations existed between the immature period, adult longevity, fecundity, and life table parameters on one side and protein content and particle size index on the other. The results of our experiments showed that cultivar Mahoor was a relatively susceptible and cultivars Bahman and Dasht were relatively resistant to R. dominica which could be useful in the development of IPM programs for this pest in store.

Comparative performance and digestive physiology ofDiaphania indica(Lepidoptera: Crambidae) onTrichosanthes anguina(Cucurbitaceae) cultivars

“…Different cultivars of a host plant play a crucial role in population growth and food utilization of insects (Golizadeh and Razmjou, 2010; Alami et al ., 2014; Nemati-Kalkhoran et al ., 2018; Mobarak et al ., 2020). Till date, no reports are available on D. indica using age-stage, two-sex life table, and further, the biology of D. indica on T. anguina is reported for the first time.…”

“…The intrinsic rate of increase ( r m ) and finite rate of increase ( λ ) can exactly predict the overall population growth, development and fecundity of an insect population, and are considered as important parameters in measuring population growth potential (Karimi-Pormehr et al ., 2018; Nemati-Kalkhoran et al ., 2018; Das et al ., 2019; Mobarak et al ., 2020). The r m was the lowest on Polo No.…”

Effects of host plants on the population parameters and activities of detoxification enzymes in Laodelphax striatellus

“…Crop cultivars impact insect life table parameters and activities of detoxifying enzyme (Li et al, 2009;Golizadeh & Abedi, 2017;Güncan & Gümüş, 2017;Zheng et al, 2017;Nemati-Kalkhoran et al, 2018) and whereas SBPH may successfully survive on a range of rice and wheat cultivars, the level of adaptability to them may vary (Li et al, 2009;Zheng et al, 2017). For example, Liu et al (2011) found out that SBPH survival rates and the activities of detoxification enzymes varied among individuals reared on four cultivars of rice.…”

Sublethal Effects of Malathion on Biology and Population Growth of Khapra Beetle, Trogoderma granarium Everts (Coleoptera: Dermestidae)

“…Exposure insects to a sublethal amount of insecticides, which result from either insecticides misapplication or degradation can generate physiological, behavioral, and survival responses (Biondi et al, 2012;Desneux et al, 2007). Several factors affect Life table parameters of khapra beetle include crop cultivars (Majd- Marani et al, 2017;Nemati-Kalkhoran et al, 2018), pressure (Finkelman et al, 2006), irradiation (Sedaghat et al, 2014;Ubaid, 2016), exposure to chemicals (Ali et al, 2018;Shakoori et al, 2016). Sublethal concentrations of tricalcium phosphate prolonged generation time (T), and increased gross reproductive rate (GRR) of T. granaries, (Kraszpulski et al, 1987).…”