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Effect of cold storage on some biological characteristics of parasitoid, aenasius bambawalei hayat (Hymenoptera: Encyrtidae)

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Title Effect of cold storage on some biological characteristics of parasitoid, aenasius bambawalei hayat (Hymenoptera: Encyrtidae)
 
Creator Rathee, Mandeep
 
Contributor Pala Ram
 
Subject Aenasius bambawalei, Phenacoccus solenopsis, Cold storage, Mummies, Adults, Temperature, Storage period, Emergence, Longevity, Fecundity, Survival, Overwintering
 
Description The present studies on cold storage and overwintering of Aenasius bamabawalei were carried
out during 2012-13 both in the laboratory as well as in the screen house of the Department of
Entomology, CCS Haryana Agricultural University, Hisar to generate information on effect of cold
storage of the parasitoid, A. bambawalei in different stages for different durations at different
temperatures on its biological parameters and to evaluate the survival of the parasitoid during winter
season. Studies on cold storage of the parasitoid were carried out by storing one-day-old Phenacoccus
solenopsis mummies (i.e. in pupal stage) and freshly emerged adults at four storage temperatures i.e. 5,
10, 15 and 20°C for 1 to 8 weeks. It was found that the parasitoid A. bambawalei can be stored in pupal
stage (i.e. in the mummies of P. solenopsis) for 1 week at 5°C and for 2 weeks each at 10 and 15°C,
respectively, without any significant effect on the key biological parameters like emergence, longevity,
fecundity and sex-ratio (F1 progeny). Emergence of the adults occurred within first week during storage
at 20°C, hence, this temperature was not suitable for storing the parasitoid in pupal stage. Females took
more time to emerge from the mummies stored for different durations at 5, 10 and 15°C as compared to
males. The parasitoid adults of A. bambawalei can be stored only for 1 week at 10°C without any
significant affect on the key biological parameters like survival, longevity, fecundity and sex-ratio (F1
progeny). The parasitoid A. bambawalei can be stored at low temperatures both in pupal and adult
stages. However, it can be stored safely for longer duration in pupal stage as compared to adult stage.
Emergence of parasitoid adults from overwintering mummies started from 11th standard week (first
week of February), being maximum in 14th standard week (first week of March) and continued until
16th standard week (third week of March) when all the parasitoid adults had emerged. Maximum
temperature ranged between 20.3 to 29.6oC and minimum between 6.6 to 12.5°C during the period of
adult emergence. Honey fed parasitoid adults i.e. males survived for 52-84 days (69.33 days) and
females survived for 69-103 days (83.40 days) during winter season in absence of host, when exposed
on 5th December. The results of the present studies may be helpful in mass rearing and conservation of
the parasitoid.
 
Date 2016-10-26T13:45:50Z
2016-10-26T13:45:50Z
2014
 
Type Thesis
 
Identifier http://krishikosh.egranth.ac.in/handle/1/82150
 
Language en
 
Format application/pdf
 
Publisher CCSHAU