Insecticide based bait formulation aganist tobacco caterpillar spodoptera litura (fabricius) (lepidoptera: noctuidae) (Record no. 161815)
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| 000 -LEADER | |
|---|---|
| fixed length control field | 04779nam a22001697a 4500 |
| 082 ## - DEWEY DECIMAL CLASSIFICATION NUMBER | |
| Classification number | 632.6 |
| Item number | SHA/IN |
| 100 ## - MAIN ENTRY--PERSONAL NAME | |
| Personal name | Shahanaz M R |
| 245 ## - TITLE STATEMENT | |
| Title | Insecticide based bait formulation aganist tobacco caterpillar spodoptera litura (fabricius) (lepidoptera: noctuidae) |
| 260 ## - PUBLICATION, DISTRIBUTION, ETC. (IMPRINT) | |
| Place of publication, distribution, etc | Vellanikkara |
| Name of publisher, distributor, etc | Department of Agricultural Entomology, College of Horticulture |
| Date of publication, distribution, etc | 2018 |
| 300 ## - PHYSICAL DESCRIPTION | |
| Extent | 54p |
| 502 ## - DISSERTATION NOTE | |
| Dissertation note | MSc |
| 520 3# - SUMMARY, ETC. | |
| Abstract | Spodoptera litura Fab. (Lepidoptera: Noctuidae) is a polyphagous pest with<br/>cosmopolitan distribution, causing severe defoliation in economically important<br/>crops. The current management strategy for this pest relies heavily on blanket<br/>spraying of insecticides which may not reach the target. Indiscriminate use of<br/>pesticides indirectly affects various non-target organisms and also will lead to the<br/>problems like resurgence, resistance and secondary pest outbreaks.<br/>Baiting technique comprises an attractive food along with an insecticide to<br/>lure insect pests and kill. The amount of insecticide active ingredient applied per<br/>unit area with the use of bait is much lower than that of blanket insecticide sprays.<br/>Hence, the present study was undertaken to identify a potential insecticidal bait for<br/>the management of S. litura.<br/>The study was conducted during 2017-2018 at the Department of Agricultural<br/>Entomology, College of Horticulture Vellanikkara, Kerala Agricultural University,<br/>Thrissur. In order to identify a base material preferred by S. litura, baits were<br/>prepared by using different substrate, viz., rice bran, maize bran and wheat bran<br/>along with jaggery and water. Mean consumption of bait by the S.litura larvae after<br/>48h were recorded and results revealed superiority of bait containing wheat bran<br/>and jaggery in 8:2 ratio, followed by maize bran. Spodoptera litura larvae<br/>consumed 0.1980 g of wheat bran based bait in a period of 48 hours.<br/>After screening the base material for bait the standardisation of<br/>phagostimulants, such as yeast (1%), starch (0.2%), and coconut oil (1%) as an<br/>additive to the bait to increase the attractiveness of bait was done. Bait containing<br/>starch (0.2%) was found to be very attractive and resulted in doubling of the<br/>consumption of bait (0.3842 g) in comparison to the control. Hence, wheat bran<br/>based diet with starch (0.2%) was chosen for further studies.<br/>Insecticides, viz., chlorpyriphos (20% EC), thiodicarb (75% WP), lambda<br/>cyhalothrin (5% EC), fipronil (5% SC), spinosad (45% SC), emamectin benzoate<br/>(5% SG), flubendiamide (39.35% SC) and chlorantraniliprole (18.5% SC) were<br/>evaluated along with two microbials, NPV of S. litura (0.5% AS), and Bacillus<br/>thuringiensis (5% WP). All the pesticides were evaluated at the doses viz., 25 per<br/>cent, 50 per cent and 75 per cent of recommended dose. The results showed that<br/>emamectin benzoate (5% SG), thiodicarb (75% WP) and chlorpyriphos (20% EC)<br/>as superior poison baits which showed 100 per cent mortality at 25 % concentration<br/>of recommended dose within 12 h. Fipronil 5% SC in 24 h (75% recommended<br/>dose) and spinosad 45% SC in 48 h (75% recommended dose) also lead to cent per<br/>cent mortality in the shortest time. The above five insecticides were chosen for the<br/>evaluation of poison baits in field.<br/>Poison baits were evaluated in field planted with cowpea (var. Anaswara).<br/>The experiment was laid out in randomized block design and replicated thrice with<br/>an absolute control (without bait) and a control plot (with unpoisoned bait). In order<br/>to prevent the movement of larvae from one plot to another plot were separated by<br/>polythene sheets. In each plot 5 plants were tagged, which were equally distributed<br/>from the centre of the plot. Twenty five six day old larvae were released at the<br/>centre of each plot. After 10 days defoliation was measured using leaf area meter.<br/>Two regression equations were worked out for central leaf and side leaves of the<br/>trifoliate leaf of cowpea. Initial leaf area was assessed by measuring the length and<br/>breadth of the leaf and substituting the breadth of the leaf in the regression equation.<br/>Observation on leaf defoliation revealed that in emamectin benzoate baited plots<br/>consumption was very low (2.95 cm2/5 plants/plot) after 10 days of treatment<br/>followed by thiodicarb (8.44 cm2/5 plants/plot), chlorpyriphos (12.38 cm2/5<br/>plants/plot), fipronil (12.69 cm2/5 plants/plot) and spinosad (30.61 cm2/5<br/>plants/plot). Poison baiting with insecticides was found to be beneficial in reducing<br/>the damage caused by S. litura at levels lower than the recommended dose with<br/>minimum disturbance to non-target organisms.<br/> |
| 650 ## - SUBJECT ADDED ENTRY--TOPICAL TERM | |
| Topical term or geographic name as entry element | Agricultural Entomology |
| 700 ## - ADDED ENTRY--PERSONAL NAME | |
| Personal name | Berin Pathrose (Guide) |
| 856 ## - ELECTRONIC LOCATION AND ACCESS | |
| Uniform Resource Identifier | http://krishikosh.egranth.ac.in/handle/1/5810144227 |
| 942 ## - ADDED ENTRY ELEMENTS (KOHA) | |
| Source of classification or shelving scheme | Dewey Decimal Classification |
| Item type | Theses |
| Not for loan | Collection code | Home library | Current library | Shelving location | Date acquired | Full call number | Barcode | Date last seen | Koha item type |
|---|---|---|---|---|---|---|---|---|---|
| Not For Loan | Reference Book | KAU Central Library, Thrissur | KAU Central Library, Thrissur | Theses | 22/09/2018 | 632.6 SHA/IN | 174282 | 22/09/2018 | Theses |