The effects of a juvenile hormone analogue on laboratory colonies of pharaoh's ant, Monomorium pharaonis (L.) (Hymenoptera, Formicidae)

1975 ◽  
Vol 65 (1) ◽  
pp. 75-80 ◽  
Author(s):  
J. P. Edwards
Keyword(s):  
Juvenile Hormone ◽  
Real Potential ◽  
Hormone Analogue ◽  
Monomorium Pharaonis ◽  
Juvenile Hormone Analogue ◽  
Juvenile Hormone Analogues ◽  
Laboratory Colonies ◽  
Worker Caste

AbstractLaboratory colonies of Monomorium pharaonis (L.) were given access only to food containing the juvenile hormone analogue isopropyl-11-methoxy-3, 7, 11-trimethyl-dodeca-2, 4-dienoate (Altosid). In contrast to control colonies all the brood died in 4–8 weeks and queens ceased to lay eggs at about this time. Comparison of ovaries dissected from treated and untreated queens showed the former to be atrophied and without developing oocytes. In treated colonies the worker caste became extinct between 9 and 20 weeks after treatment commenced but queens remained alive for more than 20 weeks. Treatments were lethal with exposure periods of one week only. Juvenile hormone analogues show real potential for the control of M. pharaonis.

JUVENILE HORMONE ANALOGUE TOXICITY TO LABORATORY REARED GYPSY MOTH LARVAE, PORTHETRIA DISPAR (LEPIDOPTERA: LYMANTRIIDAE)

1974 ◽  
Vol 106 (7) ◽  
pp. 695-699 ◽  
Author(s):  
J. Granett
Keyword(s):  
Juvenile Hormone ◽  
Gypsy Moth ◽  
Artificial Diet ◽  
Hormone Analogue ◽  
Juvenile Hormone Analogue ◽  
Porthetria Dispar ◽  
Juvenile Hormone Analogues

AbstractJuvenile hormone analogues (JHA) were fed in an artificial diet to laboratory reared Porthelria dispar (L.) larvae. The analogues used were: I: Stauffer R-20458; 1-(4′-ethylphenoxy)-6,7-epoxy-3,7-dimethyl octene. II: Altozar®. III: Hoffmann-La Roche Ro 8-5497; 10,11-epoxy-3,7,11-trimethyl-1-(2-propynyloxy)-2,6-tridecadiene. For JHA I and II mortality occurred primarily during the larval and pupal stages with overall EC50 values from 0.19 to 0.43 p.p.m. in the diet. JHA III was not toxic. The log-probit dose–mortality curves showed low slopes. Morphologic aberrations in treated larvae and pupae were observed.

scholarly journals Development and silk production by silkworm larvae after topical application of methoprene

2002 ◽  
Vol 59 (3) ◽  
pp. 585-588 ◽  
Author(s):  
José Ednilson Miranda ◽  
Sérgio Antonio de Bortoli ◽  
Roque Takahashi
Keyword(s):  
Juvenile Hormone ◽  
Larval Instar ◽  
Negative Effects ◽  
Hormone Analogue ◽  
Insect Growth Regulators ◽  
Silkworm Larvae ◽  
Silk Production ◽  
Juvenile Hormone Analogues ◽  
Chemical Products ◽  
Silkworm Bombyx Mori

Juvenile hormone analogues have been tested as insect growth regulators in silkworm (Bombyx mori), seeking an increment of silk production. These chemical products, when applied in small or moderate rates, promote the extension of the last larval instar. To understand the physiologic consequences on silk production by the silkworm strain C115 x N108, the application of methoprene, a juvenile hormone analogue, was performed to evaluate its effects on larval development and silk production. Methoprene was topically applied 48h after the fourth larval ecdysis, on the dorsal integument of the 2nd thoracic segment of the insects, at seven rates between 0 and 20 ng a.i. Methoprene influenced positively the duration of the fifth instar and the weight gain of the insects. The application of 1ng methoprene resulted in the heaviest silkglands, cocoons, shell cocoons and pupae weights. Comparatively to the control, the increment on silk production (approximately 24%) by the use of 1ng methoprene was more accentuated than the corresponding negative effects on the cocooning rate (approximately 12%).

Effects of two juvenile hormone analogue insecticides, fenoxycarb and methoprene, on Neocaridina davidi

2019 ◽  
Vol 253 ◽  
pp. 89-99 ◽  
Author(s):  
Xue Lei Hu ◽  
Jiao Jiao Niu ◽  
Qi Meng ◽  
Yuet Hung Chai ◽  
Ka Hou Chu ◽  
...  
Keyword(s):  
Juvenile Hormone ◽  
Hormone Analogue ◽  
Juvenile Hormone Analogue
Sign in / Sign up

Export Citation Format

Share Document