Record Details

Manifestation of biological attributes in Spilosoma obliqua (Wlk.), Spodoptera litura (Fab.) and Dysdercus cingulatus (Fab.) in response to essential oils and insecticides

KrishiKosh

View Archive Info
 
 
Field Value
 
Title Manifestation of biological attributes in Spilosoma obliqua (Wlk.), Spodoptera litura (Fab.) and Dysdercus cingulatus (Fab.) in response to essential oils and insecticides
 
Creator Thodsare, Nitin Harishchandra
 
Contributor Srivastava, R.P.
 
Subject biological activity, Spilosoma obliqua see Spilarctia obliqua, Spilarctia obliqua, Spodoptera litura, Dysdercus cingulatus, essential oils, insecticides, insect pests, biological control
 
Description Thesis-PhD
A detailed investigation was undertaken to evaluate the effect of essential plant oils on Spilosoma obliqua (Walk.) and Spodoptera litura (Fab.) and bioefficacy and growth regulatory activities of some essential plant oils and insecticides against S. obliqua, S. litura and Dysdercus cingulatus (Fab.). All the experiments were conducted in Mulberry Sericulture/Bioactive Plant Natural Products (BPNP)/ Insecticides Toxicology Laboratory of the Department of Entomology, Collage of Agriculture, G.B.P.U.A. &., Pantnagar. The culture of S. obliqua and S. litura test species was maintained on fresh leaves of castor, Ricinus communis (Linn.) and of D. cingulatus soaked cotton seeds. An experiment was conducted to find out the bioefficacy of essential oils from plants viz., Ocimum tenuiflorum, Cymbopogon nardus, Veteveria zizanioides, Pogostemon cablin and Murraya koenigii on feeding, growth, development and larval mortality to 18d old larvae of S. obliqua. All the oils were toxic at their respective dosages 2.5, 2.0, 1.5, 1.0 and 0.5 μl/larva. The order of toxicity of oils at 2.5 μl/larva was : O. tenuiflorum (60.0) > C. nardus (36.6) > V. zizanioides (26.6) > P. cablin (25.0) > M. koenigii (23.3); and order of % pupation and adult emergence was followes: O. tenuiflorum (0.00 and 0.00) > C. nardus (36.66 and 30.00) > P. cablin (41.66 and 33.33) > V. zizanioides (66.66 and 63.33). The effect of M. koenigii oil, on growth and development parameters of 10d old larvae of S.litura, by topical application bioassay method resulted in 26.66%larval mortality,50.00% pupation and 43.33% adult emergence at 2.5 μl/larva. An experiment was conducted to examine the contact toxicity of five plant oils viz., C. nardus, E. citriodora, O. tenuiflorum, P. cablin and S. aromaticum at 3.0, 2.0, 1.5, 1.0 and 0.5 μl/larva against 10d old larvae of S. obliqua by topical application method. The order of toxicity at 48h LD50 value was E. citriodora (1.36) > P. cablin (1.77) > S. aromaticum (1.53) > C. nardus (1.67). Another experiment was conducted on 7d old larvae of S.litura to determine the dosage-mortality response of two medicinal plant oils (M. koenigii and O. tenuiflorum) at 2.5, 2.0, 1.5, 1.0 and 0.5 μl/larva by residue contact method; the toxicity (LC50) of M. koenigii was 1.78, 1.26 and 0.98 and O. tenuiflorum was 2.40, 1.38 and 1.04 at 24, 48 and 72 HAE, respectively. An experiment was conducted to examine the dosage-mortality response of two insecticides viz., indoxacarb (0.02, 0.009, 0.006, 0.002 and 0.001%) and emamectin benzoate (0.06, 0.04, 0.02, 0.009 and 0.007) against 10d old larvae of S. obliqua. The LC value of the respective insecticides at 48h was 0.013 and 0.031; and at 72h was 0.002 and 0.009. An experiment was conducted to the dosage-mortality response of two insecticides (emamectin benzoate at 0.002%; and abamectin at 0.1 and 0.009%) by leaf dip method against 10d old larvae of S. litura, the LC50 at 24h was 0.002 and 0.02%. The studies on dosage-mortality response of four insecticide mixtures against 7d old larvae of S. litura by leaf dip bioassay method revealed that inoxacarb + cypermethrin at 48HAE was the most toxic insecticide combination (LC50=0.004) than the other three insecticide mixtures. A study on growth and development of S. litura on four host plants viz., Bt cotton, soybean, jatropha, chinarose and castor, recorded highest pupal weight on castor (3.54g) and lowest on jatropha (0.59g) and chinarose (0.74g); and the maximum adult emergence and survival were on castor followed by those on Bt cotton, soybean, china rose and on jatropha. Another experiment, conducted to determine the effect of nimadol 4.5% and some host plants on development of 6d old larvae of S. litura, revealed that the mean pupal weight was minimum in castor (15.6 to 5.0% at 2.5 to 7.5 ml/l) and maximum in maize (100%), jatropha (>90%), soybean (>80%) and Bt cotton (56.9 to 77.8%), respectively. An experiment was conducted to find out the contact and stomach toxicity of three botanicals (nimbecidine, nimoni and nimadol) at 0.02, 0.01 and 0.005% by seed soaking method against 6d old nymphs of D. cingulatus, the Abbott’s per cent corrected mortality at 24HAE was 96.6, 93.6 and 86.6; 96.6, 90.0 and 76.6; and 46.6, 30.0 and 26.6, respectively. Another experiment, conducted on 17d old nymphs of D. cingulatus by seed soaking method to examine the contact and stomach toxicity of four insecticides viz., imidacloprid (0.004, 0.002 and 0.001%), acetamiprid (0.250, 0.125 and 0.062%), monocrotophos (0.040, 0.004 and 0.001) and thiamethoxam (0.005, 0.002 and 0.00 1) revealed the Abbott’s per cent corrected mortality at 36HAE as 23.33, 20.00 and 13.33; 50.00, 40.00 and 26.66; 100.00, 83.33 and 40.00; and 33.33, 26.00 and 13.33, respectively; whereas the two botanicals (nimadol at 0.750, 0.500 and 0.250; and nimbecidine at 0.150, 0.100 and 0.050%) resulted in the Abbott’s per cent corrected mortality of was 13.33,10.00 and 6.66; and 23.33, 20.00 and 13.33 72HAE, respectively.
 
Date 2016-09-28T11:22:01Z
2016-09-28T11:22:01Z
2014-01
 
Type Thesis
 
Identifier http://krishikosh.egranth.ac.in/handle/1/79248
 
Language en
 
Format application/pdf
 
Publisher G.B. Pant University of Agriculture and Technology, Pantnagar - 263145 (Uttarakhand)