PREDATORY POTENTIAL OF Blaptostethus pallescens Popp AGAINST Tetranychus urticae Koch AND ITS INTRAGUILD PREDATION ON Neoseiulus longispinosus (Evans)
| dc.contributor.advisor | SHARMA, P L | |
| dc.contributor.author | THAKUR, SHAGUN | |
| dc.date.accessioned | 2021-11-05T06:49:51Z | |
| dc.date.available | 2021-11-05T06:49:51Z | |
| dc.date.issued | 2021-10 | |
| dc.description.abstract | ABSTRACT The present study entitled “Predatory potential of Blaptostethus pallescens Popp against Tetranychus urticae Koch and its intraguild predation on Neoseiulus longispinosus (Evans)” was carried out in the Biocontrol Laboratory of Department of Entomology, Dr. YS Parmar University of Horticulture and Forestry, Nauni, Solan (HP), during 2020-2021. The predatory bug failed to complete its life cycle on all the tested fife stages of T. urticae and could not develop beyond the fourth nymphal instar. However, when Corcyra cephalonica (Stainton) eggs were included in the predator’s diet along with T. urticae for 6 or 12h, the bug developed successfully. The biological and population parameters of the bug were highest on C. cephalonica eggs followed by T. urticae+C. cephalonica (12+12h), T. urticae+C. cephalonica (18+6h). The fecundity was highest (190.4 eggs/female) in females reared exclusively on C. cephalonica eggs followed by those reared on T. urticae+C. cephalonica (12+12h) (117.8 eggs/female) and T. urticae+C. cephalonica (18+6h) (98 eggs/female). The feeding and pest-kill potential of the predator was also higher on C. cephalonica eggs than on T. urticae+C. cephalonica (12+12h) or T. urticae+C. cephalonica (18+6h). The consumption rate of adult male and female predators was 251.8 and 410.8 on C. cephalonica eggs, which was higher than recorded for the predator feeding on T. urticae+C. cephalonica (12+12h) (170.3 and 246.4, respectively) and T. urticae+C. cephalonica (18+6h) (126.3 and 186.8, respectively). The predatory bug exhibited a type II functional response to the target prey and the parameters were higher on proto- and deutonymph than on eggs and adults. The intraguild predation of N. longispinosus by B. pallescens was not strong and the bug predated almost negligible or a few intraguild preys. Based on these results, B. pallescens can be used against T. urticae, but repeated applications may be required, as it will not be able to increase its population exclusively on the mite. Further field studies are, however, required to standardize the release rates. The predatory bug can also be used compatibly with the predatory mite, N. longispinosus as it showed only negligible intraguild predation on the predatory mite. | en_US |
| dc.identifier.uri | https://krishikosh.egranth.ac.in/handle/1/5810177735 | |
| dc.keywords | Blaptostethus pallescens Popp ,Tetranychus urticae Koch ,ntraguild predation,Neoseiulus longispinosus (Evans,Biocontrol Laboratory | en_US |
| dc.language.iso | English | en_US |
| dc.pages | 99+vii | en_US |
| dc.publisher | UHF,NAUNI | en_US |
| dc.sub | Entomology | en_US |
| dc.theme | Blaptostethus pallescens Popp ,Tetranychus urticae Koch ,ntraguild predation,Neoseiulus longispinosus (Evans,Biocontrol Laboratory | en_US |
| dc.these.type | M.Sc | en_US |
| dc.title | PREDATORY POTENTIAL OF Blaptostethus pallescens Popp AGAINST Tetranychus urticae Koch AND ITS INTRAGUILD PREDATION ON Neoseiulus longispinosus (Evans) | en_US |
| dc.type | Thesis | en_US |