BIOLOGY AND MANAGEMENT OF CABBAGE BUTTERFLY (Pieris brassicae L.) ON CAULIFLOWER CROP

Simple item page
dc.contributor.advisorSHARMA, KRISHAN CHANDER
dc.contributor.authorTHIND, DILRAJPREET SINGH
dc.date.accessioned2019-01-01T07:13:10Z
dc.date.available2019-01-01T07:13:10Z
dc.date.issued2018-10
dc.description.abstractABSTRACT The present studies on “Biology and management of cabbage butterfly (Pieris brassicae L.) on cauliflower crop.” was carried out in the Department of Entomology, College of Horticulture on cauliflower crop. The indices of cabbage butterfly under field conditions revealed that the eggs were first recorded on February 8 during 2018, the peak egg count of 28.4/10 plants was found on February 16, whereas no eggs were recorded after 24 April, 2018. However, the larvae were first recorded on February 12 during 2018, the peak larval count of 26.2 larvae/10 plants were recrded on February 20, whereas no larva was found after the 28 April, 2018. Studies on biology of the P. brassicae revealed that the pest passed through 4 stages viz., egg, larva, pupa and adult. Eggs hatched in 3-7 days with an average duration of 4.40±0.37 days. It had five larval instars. The mean duration of the first, second, third, fourth and fifth larval instar was 3.20±0.20 days, 3.50±0.17 days, 4.00±0.30 days, 4.40±0.16 days and 4.00±0.26 days respectively. The mean pupal period and the total development period (from egg to adult emergence) was 12.20±0.25 days and 35.90±1.07 days, respectively. Life fertility table was constructed on cauliflower and different fertility parameters were calculated, which revealed that the values of the gross reproductive rate (GRR) and the net reproductive rate (Ro) of P. brassicae were 120.38 and 67.87 female eggs/female, respectively. The approximate generation time (Tc) was 39.05 days and the innate capacity of natural increase (rc) was 0.1080 female/female/day. The arbitrary value of rc was used to determine the true intrinsic rate of increase (rm) graphically which was found to be 0.1082. The finite rate of increase (λ) was 1.11 females/day, while the true generation time (T) was 38.98 days. The doubling time of P. brassicae on cauliflower was 6.41 days and the weekly multiplication rate was found to be 2.13 days. Six pesticides viz., Malathion, Bacillus thuringiensis (Bt.), Beauveria bassiana, neem seed kernel extract, drake seed extract and jeevamrit were evaluated for their efficacy against the larvae of the cabbage butterfly on cauliflower crop under field conditions. The order of effectiveness of treatments based on mortality of the larvae was Malathion (0.1%) > Malathion (0.05%) > Bacillus thuringensis (0.2%) > Bacillus thuringensis (0.1%) > Beauveria bassiana (2.0%) > Neem seed kernel extract (8.0%) > Beauveria bassiana (1.0%) > Neem seed kernel extract (4.0%) > Drake seed extract (10%) > Jeevamrit (20%), Drake seed extract (5.0%) > Jeevamrit (10%), respectively.en_US
dc.identifier.urihttp://krishikosh.egranth.ac.in/handle/1/5810086881
dc.keywordsBiology and management, butterfly ,caulifloweren_US
dc.language.isoenen_US
dc.pages56+ien_US
dc.publisherUHF, NAUNIen_US
dc.subEntomologyen_US
dc.subjectnullen_US
dc.themeBiology and management, butterfly ,caulifloweren_US
dc.these.typeM.Scen_US
dc.titleBIOLOGY AND MANAGEMENT OF CABBAGE BUTTERFLY (Pieris brassicae L.) ON CAULIFLOWER CROPen_US
dc.typeThesisen_US
Files
Original bundle
Now showing 1 - 1 of 1
No Thumbnail Available
Name:
PDF M.Sc. Thesis Dilrajpreet Singh Thind (2018).pdf
Size:
1.94 MB
Format:
Adobe Portable Document Format
Description:
ENTOMOLOGY
Download
License bundle
Now showing 1 - 1 of 1
No Thumbnail Available
Name:
license.txt
Size:
1.71 KB
Format:
Item-specific license agreed upon to submission
Description:
Download
Collections
Theses