TRITROPHIC INTERACTIONS OF CASTOR SEMILOOPER, Achaea janata L AND ITS ENDOLARVAL PARASITOID Snellenius maculipennis (Szepligate)

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dc.contributor.advisorHARIPRASAD, K.V.
dc.contributor.authorESWAR NAIK, M
dc.date.accessioned2018-08-13T07:35:50Z
dc.date.available2018-08-13T07:35:50Z
dc.date.issued2017
dc.descriptionD5507en_US
dc.description.abstractLaboratory studies on the “Tri-trophic interactions of castor semilooper, Achaea janata L and its endolarval parasitoid Snellenius maculipennis (Szepligate)” were carried out during 2016-17 at Insectary, Department of Entomology, S. V. Agricultural College, Tirupati. Six varieties of castor viz., DPC-9 (Green zero bloom), DCH-177 (Red single bloom), PCH-111 (Green double bloom), 48-1 (Red double bloom), DCH-519 (Green triple bloom) and GCH-4 (Red triple bloom) were grown in plastic pots during kharif 2016 from August onwards under net house conditions. Excised leaves of equal maturity castor varieties with different blooms were used for studying the biology of A. janata at 28 ± 2˚C temperature and 75-80 per cent RH. Longest larval duration, adult longevity, total life cycle with more larval weights and fecundity of A. janata were observed when reared on DPC-9 (14.42 ±0.87 days; 13.15±0.93 days; 40.77 ± 01.52 days and 1.253 ± 0.129 g; 316.5 ± 20.07 eggs, respectively), indicating DPC-9 as the most preferred variety for growth and multiplication of A. janata followed by DCH-177 (14.25 ±0.81 days; 13.00 ±0.72 days; 40.70 ±01.17 days and 1.202 ± 0.090 g; 276.5 ± 35.19 eggs, respectively). The Shortest larval duration, adult longevity, total life cycle with less larval weight and fecundity of A. janata were observed when reared on GCH-4 (12.42 ±0.81 days; 12.75 ±0.73 days; 36.47 ±03.21 days and 0.925 ± 0.218 g; 234.25 ± 20.27 eggs, respectively) followed by DCH-519 (12.50 ±0.58 days; 12.65 ±0.58 days; 37.15 ±01.25 days and 1.191 ± 0.095 g; 231.0 ± 13.16 eggs, respectively), recording as least preferred hosts for growth and multiplication of A. janata. The performance of A. janata on the remaining varieties were in between DPC-9 and GCH-4. Approximate digestibility (AD) of third instar was highest when reared on GCH-4 (0.953±0.003 mg) and lowest when reared on DCH-177 (0.469±0.191 mg). Efficiency of conversion of ingested food (ECI) of fourth instar was highest when reared on DPC-9 (0.840±0.190 mg) and lowest ECI were observed when reared on GCH-4 (0.521±0.152 mg). Efficiency of conversion of digested food (ECD) and consumption index (CI) of fifth instar was highest when reared on DPC-9 (0.675±0.132 mg; 0.914±0.009 mg) and lowest efficiency of conversion of digested food (ECD) and consumption index (CI) were observed when reared on GCH-4 (0.379±0.050 mg; 0.219±0.045 mg, respectively). Protein content, total free amino acids, total carbohydrates and reducing sugars were positively correlated with total larval duration, adult longevity, total life cycle and fecundity of A. janata (statistically not significant). Total phenols content was negatively correlated with total larval duration, adult longevity, total life cycle and fecundity of A. janata. (statistically significant). Per cent parasitization by S. maculipennis on A. janata larvae released on castor varieties with different blooms was higher on PCH-111 (67.5±7.73 %) followed by DCH-177 (63.3±31.97 %), 48-1 (61.2±10.38 %), DCH-519 (61.2±10.30 %), GCH-4 (60.4±12.50 %) and DPC-9 (50.7±15.32 %) (Not statistically significant). Biological parameters of parasitoid, S. maculipennis such as egg+larval duration, cocoon duration, adult longevity and total life cycle, when larvae released on different castor varieties at different blooms viz., DPC-9, DCH-177, PCH-111, 48-1, DCH-519 and GCH-4 were 5.25 to 5.75, 4.50 to 4.75, 3.50 to 3.75, 13.2 to 13.75 days, respectively.en_US
dc.identifier.urihttp://krishikosh.egranth.ac.in/handle/1/5810064208
dc.keywordsTRITROPHIC, CASTOR, SEMILOOPER, Achaea janata, ENDOLARVAL PARASITOID, Snellenius maculipennis, Szepligateen_US
dc.language.isoen_USen_US
dc.pages100en_US
dc.publisherAcharya N.G. Ranga Agricultural Universityen_US
dc.research.problemTRITROPHIC INTERACTIONS OF CASTOR SEMILOOPER, Achaea janata L AND ITS ENDOLARVAL PARASITOID Snellenius maculipennis (Szepligate)en_US
dc.subEntomologyen_US
dc.subjectnullen_US
dc.themeTRITROPHIC INTERACTIONS OF CASTOR SEMILOOPER, Achaea janata L AND ITS ENDOLARVAL PARASITOID Snellenius maculipennis (Szepligate)en_US
dc.these.typeM.Scen_US
dc.titleTRITROPHIC INTERACTIONS OF CASTOR SEMILOOPER, Achaea janata L AND ITS ENDOLARVAL PARASITOID Snellenius maculipennis (Szepligate)en_US
dc.typeThesisen_US
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