Efficacy of talc-based formulation of Beauveria bassiana (Bals.) Vuill. (MZ749636) against two spotted spider mite, Tetranychus urticae Koch

Tetranychus urticae is one of the most important and destructive mite species infesting the vegetable crops, which is very important to control because of its wide host range. The damage caused by the two spotted spider mite can be eliminated by using entomopathogenic fungi, as the acaricidal control causes various problems such as resistance, resurgence and residue problems. Therefore, the present study was carried out with a view to evaluate the efficacy of the talc-based formulation of Beauveria bassiana (MZ749636) under pot-culture conditions against two spotted spider mite (TSSM), T. urticae in potted bhendi (Abelmoschus esculentus) plants, in comparison with fenazaquin 10 EC @ 1.5ml/l, azadirachtin 3000 ppm @ 2ml/l and crude formulation of B. bassiana, MZ749636 @ 1 x 108 conidia/ml. After two rounds of spraying at fortnight intervals, the talc- formulation of B. bassiana, MZ749636 resulted in 62.83 per cent cumulative reduction of TSSM over the control. However, fenazaquin 10 EC @1.5 ml/l recorded the maximum cumulative mortality of 80.07 per cent, followed by azadirachtin 3000 ppm @ 2ml/l, which recorded a cumulative mortality per cent of 71.06 per cent. Crude formulation of B. bassiana recorded 58.12 per cent reduction of TSSM over the control after two rounds of spraying. This was the first study that attempted to evaluate the efficacy of the talc formulation of the B. bassiana (MZ749636) isolate against TSSM

Degree days and demography of Spodoptera frugiperda (J. E. Smith) (Lepidoptera: Noctuidae) on maize at different temperatures

The temperature has a direct effect on the activity of insect pests and their developmental rate. The increasing temperature could profoundly influence the population dynamics, life cycle, length of reproduction, fecundity, and longevity. In the present study, the impact of different temperatures (32, 33, 34, 35 and 36°C) on the degree days and population fitness of Spodoptera frugiperda (J. E. Smith) was evaluated under artificial conditions. The results showed that for S. frugiperda, an average of 690.38 degree days was required to complete the total life span. The total larval developmental time, pupal duration and adult longevity required 237.38, 184.47 and 228.10 degree days, respectively. The life history data of S. frugiperda were analysed by using TWOSEX-MSChart. An increase in temperature reduced the developmental time of S. frugiperda at age x and stage j. The highest reproductive value (vx) of S. frugiperda was obtained at 34°C (600 individuals per day) and was found to be reduced at a further increase in temperature of 35°C (260 individuals per day) and 36°C (120 individuals per day). These results signify the improved fitness of S. frugiperda with increasing temperature levels, and the degree days help to predict the development pattern of S. frugiperda based on heat accumulation

Numerical modeling of sodium fire - Part I: spray combustion

Abstract not availablePratap Sathiah, Ferry Roelof

Numerical modeling of sodium fire - Part II: pool combustion and combined spray and pool combustion

Abstract not availablePratap Sathiah, Ferry Roelof

The role of CFD combustion modeling in hydrogen safety management - Part I: Validation based on small scale experiments

Abstract not availablePratap Sathiah, Ed Komen, Dirk Roekaert

Sources of Rust Resistance in Purple-colored Sorghum

A total of 5218 sorghum accessions was evaluated for their reaction to Puccinia purpurea in field experiments at Patancheru, India, during the post-rainy season of 1991-92; of these, 15 were rated 2 and 107 were rated 3-4 (on a scale of 1 to 5, resistant to susceptible) and were reassessed during 1993-94 in a field experiment where high humidity was maintained by sprinkler irrigation and resistance to Exserohilum turcicum [Setosphaeria turcica] was also evaluated. The 51 accessions that were rust-free or resistant to rust were rescreened during 1993-94 for resistance to both pathogens. Accessions IS 2300, IS 3443 C40, IS 31446, IS 18758 C242, IS 18758 C603 and IS 7023 demonstrated high levels of resistance to P. purpurea, with a further 9 accessions showing moderate to high resistance; these 15 accessions also showed moderate to high resistance to S. turcica. It is thought significant that 10 of these accessions are purple-coloured as sorghums with purple pigmentation are generally susceptible to rust

Large Eddy Simulation for an inherent boron dilution transient

Abstract not availableS.T. Jayaraju, P. Sathiah, E.M.J. Komen, E. Bagliett

The role of CFD combustion modeling in hydrogen safety management - II: Validation based on homogeneous hydrogen-air experiments

Abstract not availablePratap Sathiah, Steven van Haren, Ed Komen, Dirk Roekaert