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Verma, S. C.
- Mass Production of Wax Moths and Economics of Parasitoid, Apanteles galleriae Wilkinson Production
Abstract Views :269 |
PDF Views:128
Authors
S. C. Verma
1,
Desh Raj
1
Affiliations
1 Department of Entomology, H. P. Krishi Vishvavidyalaya, Palampur 176 062, Himachal Pradesh, IN
1 Department of Entomology, H. P. Krishi Vishvavidyalaya, Palampur 176 062, Himachal Pradesh, IN
Source
Journal of Biological Control, Vol 12, No 2 (1998), Pagination: 123-129Abstract
The experiment was conducted in the Department of Entomology, Himachal Pradesh, Krishi Vishvavidyalaya, Palampur during 1993-94. The cultures of wax moths namely Galleria mellonella (Linnaeus) and Achroia grisella (Fabricius) were raised on artificial diet. The larvae developed on artificial diet were utilized for mass rearing of the parasitoid, Apanteles galleriae Wilkinson. The maximum number of wax moths larvae were produced when jar size of 20.32 × 16.24 cm was used and when 45 female and 15 male parasitoids were released in the above mentioned jars and 200 larvae were exposed. The economics of parasitoid production was calculated as Rs. 0.66 per 10 adults of A. galleriae.
Keywords
Achroia grisella, Apanteles galleriae, Artificial Diet, Biocontrol, Galleria mellonella.Full Text
- Spatial Distribution of Cabbage Aphid, Brevicoryne brassicae (L.) and its Parasitoid, Diaeretiella rapae (Mc Intosh) Under Sub-Temperate Conditions of Himachal Pradesh, India
Abstract Views :313 |
PDF Views:153
Authors
Affiliations
1 Department of Entomology, Dr Y S Parmar University of Horticulture and Forestry, Nauni, Solan - 173230, Himachal Pradesh, IN
1 Department of Entomology, Dr Y S Parmar University of Horticulture and Forestry, Nauni, Solan - 173230, Himachal Pradesh, IN
Source
Journal of Biological Control, Vol 33, No 2 (2019), Pagination: 103-108Abstract
Cabbage aphid, Brevicoryne brassicae (L) (Aphididae: Hemiptera) is one of the most serious pest of cauliflower throughout the world. Knowledge of spatial distribution is important for developing an effective sampling plan and ultimately for IPM strategies for a given pest. In the present study spatial distribution of B. brassicae and its parasitoid, Diaeretiella rapae (Mc lntosh) (Braconidae: Hymenoptera) was studied on cauliflower (Brassica oleracea var botrytis) under sub-temperate conditions of India during 2017. Both B. brassicae and D. rapae assumed activity in the fourth week of January and remained active till May end with peak activity during fourth week of March, 2017. Dispersion indices like variance to mean ratio (σ2/X), David-Moore index (IDM = σ2/X-1), mean crowding (X*), Lloyd’s mean crowding index (X*/X) and ‘k’ of negative binomial indicated that both the aphid and the parasitoid followed negative binomial distribution throughout the cropping season, Taylor’s power equation was σ2 = 1.7013X0.5314 for B. brassicae and σ2 = 2.2057X1.4467 for D. rapae, while Iwao’s patchiness regression equation was X*= 32.0099+1.7947X and X*= -2.0678+2.2746X for B. brassicae and D. rapae, respectively. Optimum number of samples required varied with the mean density and the desired precision level for both the aphid and the parasitoid.
Keywords
Brevicoryne brassicae, Diaeretiella rapae, Dispersion, Parasitoid, Spatial Distribution.Full Text
References
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- Thermal Requirements of Tuta absoluta (Meyrick) and Influence of Temperature on its Population Growth on Tomato
Abstract Views :287 |
PDF Views:120
Authors
Affiliations
1 Department of Entomology, Dr YSP University of Horticulture and Forestry, Nauni, Solan - 173230, Himachal Pradesh, IN
1 Department of Entomology, Dr YSP University of Horticulture and Forestry, Nauni, Solan - 173230, Himachal Pradesh, IN
Source
Journal of Biological Control, Vol 34, No 1 (2020), Pagination: 73-81Abstract
The present study deals with the impact of temperature on development, survival, reproduction and population growth of a recently invaded and the most destructive pest of tomato, Tuta absoluta (Meyrick) with the aim to understand its possible expansion in different agro-climatic zones. Though T. absoluta was able to develop between 15° and 35°C, temperature around 25°-30°C was more suitable. Survival and fecundity were highest at 25°C and lowest at 35°C. Developmental threshold for different developmental stages of the pest varied from 6.2 to 9.5°C, while the thermal constant required by the insect to complete the development from egg to adult emergence was 500 degree-days. Population growth parameters were also influenced significantly by the rearing temperature. Intrinsic rate of increase, net reproductive rate and finite rate of increase was higher at 25° and 30°C as compared to other temperature regimes. The study concludes that T. absoluta can be a serious pest of tomato in mid-hills of north-western Himalayan region and the southern plains of India where temperatures varies between 15-35°C. Furthermore, the developmental threshold values indicate that the pest can develop and survive at temperatures as low as 6-9°C without entering the diapause as long as the food is available.Keywords
Fecundity, Reproduction, Survival, Temperature, Tuta absoluta.Full Text
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