Bio-ecology and management of perianth infesting mealy bugs dysmicoccus brevipes(Cockerell) and Pseudococcus Longispinus (Targioni-Tozzetti) on coconut (Record no. 27097)
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| 000 -LEADER | |
|---|---|
| fixed length control field | 03255nam a2200181Ia 4500 |
| 003 - CONTROL NUMBER IDENTIFIER | |
| control field | OSt |
| 005 - DATE AND TIME OF LATEST TRANSACTION | |
| control field | 20220303150248.0 |
| 008 - FIXED-LENGTH DATA ELEMENTS--GENERAL INFORMATION | |
| fixed length control field | 140128s9999 xx 000 0 und d |
| 082 ## - DEWEY DECIMAL CLASSIFICATION NUMBER | |
| Classification number | 632.6 |
| Item number | BIN/BI |
| 100 ## - MAIN ENTRY--PERSONAL NAME | |
| Personal name | Bindu Radhakrishnan |
| 245 ## - TITLE STATEMENT | |
| Title | Bio-ecology and management of perianth infesting mealy bugs dysmicoccus brevipes(Cockerell) and Pseudococcus Longispinus (Targioni-Tozzetti) on coconut |
| 260 ## - PUBLICATION, DISTRIBUTION, ETC. (IMPRINT) | |
| Place of publication, distribution, etc. | Vellayani |
| Name of publisher, distributor, etc. | Department of Agricultural Entomology, College of Agriculture |
| Date of publication, distribution, etc. | 2003 |
| 502 ## - DISSERTATION NOTE | |
| Degree type | MSc |
| 520 3# - SUMMARY, ETC. | |
| Summary, etc. | A study was conducted at the College of Agriculture, Vellayani from <br/>January 2001 to December 2001 to study the biology, species composition <br/>and symptomatology of perianth infesting mealybugs, D. brevipes and P. <br/>longispinus infesting the coconut palm and to assess the yield losses <br/>caused by the pest and to evolve management measures. <br/>The biology of the two species was studied after reanng them on <br/>pumpkin fruits. The mean larval period and adult longevity of D. brevipes <br/>and P. longispinus when reared on pumpkin were 36 and 103.3 and 26 and <br/>57 days respectively. The mean sex ratio of D. brevipes was 3.17 and of <br/>P. longispinus was 3.54. Pumpkin appeared to be a good host material for <br/>mass rearing PMBs. <br/>Studies on the yield loss assessment revealed an annual yield loss of <br/>Rs 139.20/ palm in the highly susceptible palms whereas in the medium <br/>and low susceptible palms the yield losses were Rs. 85.80/palm and Rs. <br/>40.80/ palm respectively. <br/>When the influence of bunch age on the extent of damage by <br/>mealybugs was studied, highest mean per cent damage was observed in the <br/>fifth bunch followed by fourth and sixth bunches. Maximum population <br/>of PMBs were observed in the fifth nutlet. The mean population of D. <br/>brevipes was maximum during May (1.31) whereas the mean population of <br/>P. longispinus was maximum during March (1.13). <br/>Studies on the susceptibility of stage of bunch to mealybug damage <br/>indicated that the peak level of damage was in the fifth bunch. <br/>Consequently the maximum damage was observed in the month of June. <br/> <br/>Rainfall was observed to be the most important factor adversely affecting <br/>mealybug population. <br/>Development of symptoms as a consequence of feeding injury by <br/>PMBs include drying of nut without drying of calyx, stunting, deformities <br/>in the buttons such as development of cavities in place of embryo and <br/>gummy exudation. The mean population of other perianth infesting <br/>arthropods found associated with highly infested category of palms was <br/>low when compared to medium and low category palms. A positive <br/>relation between number of flowers per spikelet and susceptibility to <br/>mealybugs was observed. A study on the reaction of nutlets of WC'T <br/>variety to PMBs in terms of tepal colour revealed that orange and green <br/>coloured tepals were the most preferred by PMBs. Ant species C. nuda, <br/>T. albipis and A. longipes were seen closely associated with PMBs. <br/>Among the various pesticides evaluated against PMBs, triazophos <br/>(0.05) and profenofos (0.05) were found to be effective in controlling the <br/>pest. <br/><br/> |
| 700 ## - ADDED ENTRY--PERSONAL NAME | |
| Personal name | Premila K S (Guide) |
| 856 ## - ELECTRONIC LOCATION AND ACCESS | |
| Uniform Resource Identifier | <a href="https://krishikosh.egranth.ac.in/handle/1/5810155588">https://krishikosh.egranth.ac.in/handle/1/5810155588</a> |
| 942 ## - ADDED ENTRY ELEMENTS (KOHA) | |
| Source of classification or shelving scheme | Dewey Decimal Classification |
| Koha item type | Theses |
| Withdrawn status | Lost status | Source of classification or shelving scheme | Damaged status | Not for loan | Home library | Current library | Shelving location | Date acquired | Total Checkouts | Full call number | Barcode | Date last seen | Price effective from | Koha item type |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Dewey Decimal Classification | KAU Central Library, Thrissur | KAU Central Library, Thrissur | Theses | 18/03/2014 | 632.6 BIN/BI | 172156 | 18/03/2014 | 18/03/2014 | Theses |