DEVELOPMENT AND EVALUATION OF INTEGRATED PEST MANAGEMENT (IPM) INTERVENTIONS AGAINST MULBERRY LEAF ROLLER, Diaphania pulverulentalis (HAMPSON) (LEPIDOPTERA: PYRALIDAE)
| dc.contributor.advisor | Narayanaswamy, K. C | |
| dc.contributor.author | HARISH BABU, S | |
| dc.date.accessioned | 2017-08-10T04:31:31Z | |
| dc.date.available | 2017-08-10T04:31:31Z | |
| dc.date.issued | 2015-09-08 | |
| dc.description.abstract | An integrated pest management package was standardized under laboratory condition and tested in farmers’ fields against mulberry leaf roller, Diaphania pulverulentalis (Hampson), a major defoliating pest of mulberry in tropical parts of the country. NSKE (4 %) was significantly superior to five other neem formulations against larvae of D. pulverulentalis under laboratory conditions. LT50 values for D. pulverulentalis larvae treated with different concentrations of NSKE (i.e., 0.5, 1.0, 2.0, 4.0 and 8.0 %) were significantly different, ranging between 1.06 to 5.27 days. NSKE at 1.0, 2.0, 4.0 and 8.0 percent had maximum adverse effect on D. pulverulentalis development and survival, with minimum LC50 value (946.38 ppm). Laboratory bioassay proved that feeding silkworm with NSKE (4 %) treated leaves on 22nd days after spray was safest by recording lowest silkworm mortality (2.11 %), without affecting economic parameters of silkworm. The egg parasitoid, Trichogramma chilonis recorded higher parasitization on one-day-old eggs of D. pulverulentalis (90.84±1.18 %), compared to two (90.00±0.00 %) and three-day-old eggs (72.50±5.90 %), while, pupal parasitoids, Tetrastichus howardii and Nesolynx thymus showed 86.67 and 13.33 percent parasitization, respectively on pre-pupae of D. pulverulentalis. Similar trend was also observed even on pupae. However, T. chilonis was more efficient than the pupal parasitoids. The LC50 of DpNPV for D. pulverulentalis was 0.591 ppm, while the LT50 was 3.04 days when caterpillars were fed with mulberry leaf treated with highest DpNPV load of 27.65×105 PIBs/ml, besides registering maximum mortality during fifth instar, prolonged early larval and moulting periods and hindering completion of fourth moult. The IPM module (4 % NSKE spray at 15 to 20 days after pruning (DAP) + DpNPV @ 27.65×105 PIBs/ml at 25 to 30 DAP + release of T. chilonis @ 1 lakh/acre at 45 to 50 DAP) recorded significantly lower pest infestation of 11.55 per cent compared to chemical control (19.04 %), at 65 DAT, besides registering higher cost-benefit ratio (1:7.14) than chemical control (1:4.70). Feeding the mulberry leaves from IPM treated plots had no negative impact on growth and productivity of silkworm (PM×CSR2) thus proving silkworm-friendly and cost- effective nature of IPM. | en_US |
| dc.identifier.other | Th-11216 | |
| dc.identifier.uri | http://krishikosh.egranth.ac.in/handle/1/5810028208 | |
| dc.language.iso | en | en_US |
| dc.pages | 231 | en_US |
| dc.publisher | UNIVERSITY OF AGRICULTURAL SCIENCES GKVK, BENGALURU | en_US |
| dc.sub | Sericulture | en_US |
| dc.subject | null | en_US |
| dc.theme | DEVELOPMENT AND EVALUATION OF INTEGRATED PEST MANAGEMENT (IPM) INTERVENTIONS | en_US |
| dc.these.type | Ph.D | en_US |
| dc.title | DEVELOPMENT AND EVALUATION OF INTEGRATED PEST MANAGEMENT (IPM) INTERVENTIONS AGAINST MULBERRY LEAF ROLLER, Diaphania pulverulentalis (HAMPSON) (LEPIDOPTERA: PYRALIDAE) | en_US |
| dc.type | Thesis | en_US |