Jp. Parkman et Jh. Frank, DEVELOPMENT AND REPRODUCTION OF MOLE CRICKETS (ORTHOPTERA, GRYLLOTALPIDAE) AFTER TREATMENTS WITH HYDROPRENE AND PYRIPROXYFEN, Journal of economic entomology, 91(2), 1998, pp. 392-397
Hydroprene and pyriproxyfen, as liquid sprays applied to soil and as b
ait formulations, were evaluated against nymphs of Scapteriscus abbrec
iatus Scudder in the laboratory. Small and large nymphs were treated.
Survival, development, and resulting progeny production were observed.
Hydroprene treatments affected neither survival and development of ny
mphs nor reproduction of resulting adults. Pyriproxyfen treatments cau
sing substantial mortality were the 0.5% spray to small nymphs (33% mo
rtality), 0.1% spray to large nymphs (33% mortality of females). 0.5%
spray to large nymphs (87 and 67% mortality of females and males, resp
ectively), and baits offered to large nymphs (40% mortality of females
). Concentrations of pyriproxyfen within each treatment group that cau
sed the most deformities of surving adults were the 0.1% spray to smal
l nymphs(85% of females and males deformed), 0.5% spray to large nymph
s (100% of males deformed), and the 0.5% bait offered to large nymphs
(46% of females deformed). Baits offered to small nymphs caused no def
ormities. Nymphal development times were significantly lengthened by m
ost pyriproxyfen treatments. Treatments significantly reducing progeny
(egg and nymph) production of surviving adults were 0.1 and 0.5% spra
ys to small nymphs and 0.02, 0.1, and 0.5% sprays to large nymphs. Pro
geny production was significantly reduced when one or both members of
a mating pair were deformed. The potential of pyriproxyfen for mole cr
icket control and possible limitations are discussed.