Results 31 to 40 of about 162,464 (343)

SUPERNUMERARY LARVAL INSTARS IN CYCLORRHAPHOUS DIPTERA

open access: yesThe Biological Bulletin, 1972
1. The developmental program for metamorphosis is determined in third instar larvae of Calliphora and Sarcophaga very early after ecdysis. The process is activated by feeding and can be delayed for many days by starvation.2. High doses of ecdysterone (20 µg per larva) injected just after ecdysis or in starved larvae cause a precocious molt and the ...
J. Žďárek, K. Sláma
openaire   +4 more sources

Extraordinary morphological changes in valve morphology during the ontogeny of several species of the Australian ostracod genus Bennelongia (Crustacea, Ostracoda)

open access: yesEuropean Journal of Taxonomy, 2013
Ostracods belonging to the genus Bennelongia differ much in valve morphology between adults and juveniles. Adult valves are asymmetrical, characterised by a beak-like feature in the antero-ventral region of the left valve, and, with some notable ...
Patrick De Deckker, Koen Martens
doaj   +1 more source

Relative preference and demographic parameters of Encarsia formosa Gahan against Trialeurodes vaporariorum (Westwood)

open access: yesEgyptian Journal of Biological Pest Control, 2021
Background The greenhouse whitefly, Trialeurodes vaporariorum (Westwood) (Hemiptera: Aleyrodidae), is a cosmopolitan, polyphagous and a serious pest of vegetables and ornamentals in greenhouse.
Anamika Walia   +4 more
doaj   +1 more source

Silencing of two insulin receptor genes disrupts nymph-adult transition of alate brown citrus aphid [PDF]

open access: yes, 2017
Insulin receptors play key roles in growth, development, and polymorphism in insects. Here, we report two insulin receptor genes (AcInR1 and AcInR2) from the brown citrus aphid, Aphis (Toxoptera) citricidus.
Ding, Bi-Yue   +7 more
core   +2 more sources

Notes on the Biology and Parasitoids of the Sweet Fern Underwing (Lepidoptera: Noctuidae) in Michigan [PDF]

open access: yes, 2017
(excerpt) The sweet fern underwing, Catocala antinympha (Hubner), sometimes called the wayward nymph (Holland, 1968), is one of several lepidopterous defoliators of sweet fern, Comptonia peregrina (L.) Coult.
Wilson, Louis F
core   +2 more sources

Factors affecting methylmercury biomagnification by a widespread aquatic invertebrate predator, the phantom midge larvae Chaoborus [PDF]

open access: yes, 2012
MeHg biomagnification by the phantom midge Chaoborus in relation to MeHg concentrations in their prey and its migratory behavior was investigated in two Canadian Precambrian Shield lakes.
Aldamman, Lama   +5 more
core   +2 more sources

Determination of female-biased sexual size dimorphism in moths with a variable instar number: The role of additional instars [PDF]

open access: yesEuropean Journal of Entomology, 2006
While the ultimate causes and adaptive significance of sexual size dimorphism (SSD) have been extensively studied, the developmental mechanisms behind this phenomenon have received little attention. Going through an additional larval instar may form a specific way of achieving SSD in arthropods. In the present study, the mechanisms of SSD determination
Toomas Tammaru, Toomas Esperk
openaire   +3 more sources

Potential Protein and Biodiesel Sources from Black Soldier Fly Larvae: Insights of Larval Harvesting Instar and Fermented Feeding Medium

open access: yesEnergies, 2019
Primarily produced via transesterification of lipid sources, fatty acid methyl ester (FAME) of biodiesel derived from insect larvae has gained momentum in a great deal of research done over other types of feedstock.
Chung-Yiin Wong   +8 more
doaj   +1 more source

The Growth and Survival of Early Instars of \u3ci\u3eBellura Obliqua\u3c/i\u3e (Lepidoptera: Noctuidae) on \u3ci\u3eTypha Latifolia\u3c/i\u3e and \u3ci\u3eTypha Angustifolia\u3c/i\u3e [PDF]

open access: yes, 2017
Larvae of the noctuid moth Bellura obliqua are frequently encountered on Typha latifolia, but less commonly on Typha angustifolia. Experiments were conducted to compare the growth and survivorship of early B. obliqua instars on the two species of cattail.
Penko, J. M, Pratt, D. C
core   +2 more sources

Moulting pattern and mortality during the final emergence of the Coromandel Marsh Dart Damselfly Ceriagrion coromandelianum (Zygoptera: Coenagrionidae) in central India

open access: yesJournal of Threatened Taxa, 2019
The final emergence of the Coromandel Marsh Dart Damselfly Ceriagrion coromandelianum was studied for 50 days (22 January–12 March, 2011) from the botanical garden of Hislop College, Nagpur, India, (a semi controlled site) where small underground cement ...
Nilesh R. Thaokar   +2 more
doaj   +1 more source

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