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2015 ; 6
(2
): 489-507
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Slow-Release Sachets of Neoseiulus cucumeris Predatory Mites Reduce Intraguild
Predation by Dalotia coriaria in Greenhouse Biological Control Systems
#MMPMID26463199
Pochubay E
; Tourtois J
; Himmelein J
; Grieshop M
Insects
2015[Jun]; 6
(2
): 489-507
PMID26463199
show ga
Intraguild predation of Neoseiulus cucumeris Oudemans (Phytoseiidae) by
soil-dwelling predators, Dalotia coriaria Kraatz (Staphylinidae) may limit the
utility of open rearing systems in greenhouse thrips management programs. We
determined the rate of D. coriaria invasion of N. cucumeris breeder material
presented in piles or sachets, bran piles (without mites), and sawdust piles. We
also observed mite dispersal from breeder piles and sachets when D. coriaria were
not present. Dalotia coriaria invaded breeder and bran piles at higher rates than
sawdust piles and sachets. Furthermore, proportions of N. cucumeris in sachets
were six- to eight-fold higher compared with breeder piles. When D. coriaria were
absent, N. cucumeris dispersed from breeder piles and sachets for up to seven
weeks. In earlier weeks, more N. cucumeris dispersed from breeder piles compared
with sachets, and in later weeks more N. cucumeris dispersed from sachets
compared with breeder piles. Sachets protected N. cucumeris from intraguild
predation by D. coriaria resulting in higher populations of mites. Therefore,
sachets should be used in greenhouse biocontrol programs that also release D.
coriaria. Furthermore, breeder piles that provide "quick-releases" or sachets
that provide "slow-releases" of mites should be considered when incorporating N.
cucumeris into greenhouse thrips management programs.