Toxicity of certain insecticides toSturmiopsis inferens, a larval parasite of sugarcane moth borers

Entomophaga ◽  
1990 ◽  
Vol 35 (3) ◽  
pp. 385-391 ◽  
Author(s):  
S. Easwaramoorthy ◽  
H. David ◽  
G. Santhalakshmi ◽  
M. Shanmugasundaram ◽  
V. Nandagopal ◽  
...  
Keyword(s):  
Larval Parasite ◽  
Sugarcane Moth Borers

Parasitic and Predacious Agents Affecting the Hippelates pusio Complex in Jamaica and Trinidad

1966 ◽  
Vol 98 (1) ◽  
pp. 28-33 ◽  
Author(s):  
E. F. Legner ◽  
E. C. Bay ◽  
T. H. Farr
Keyword(s):  
Natural Enemies ◽  
Larval Parasite ◽  
Predominant Species ◽  
Parasitic Hymenoptera

AbstractA search for natural enemies of Hippelates eye gnats in Jamaica and Trinidad in 1963 resulted in the discovery of four pupal parasites, Trichopria nov. sp., Spalcmgia drosophilae Ashmead, a species of Spalangia and Encyrtidae, and one larval parasite, Trybliographa nov. sp., in Jamaica. What were probably phoretic mites of the Acaridiae infested up to 6.1 per cent of the adult populations in Jamaica. No parasitic Hymenoptera were found attacking Hippelates in Trinidad. Parasitization in Jamaica sometimes approached 40 per cent, but overall parasitization with all host exposures considered did not exceed 2.5 per cent. The effect of predators on naturally breeding Hippelates populations in both Jamaica and Trinidad seemed highly significant, and predominant species are listed.

The Economic Impact of Sugarcane Moth Borers in Indonesia

Sugar Tech ◽  
2014 ◽  
Vol 16 (4) ◽  
pp. 405-410 ◽  
Author(s):  
Francois-Regis Goebel ◽  
Etik Achadian ◽  
Peter Mcguire
Keyword(s):  
Economic Impact ◽  
Sugarcane Moth Borers

Micromotility meter: an instrument designed to evaluate the action of drugs on motility of larval and adult nematodes

Parasitology ◽  
1986 ◽  
Vol 93 (2) ◽  
pp. 341-346 ◽  
Author(s):  
J. L. Bennett ◽  
R. A. Pax
Keyword(s):  
Caenorhabditis Elegans ◽  
Adult Female ◽  
Ascaris Suum ◽  
Drug Action ◽  
Single Sample ◽  
Nippostrongylus Brasiliensis ◽  
Brugia Pahangi ◽  
Larval Parasite ◽  
Parasite Motility ◽  
Larval Parasites

SUMMARYAn instrument for measuring the motility of larval and adult nematodes is described along with an analysis of its use as a tool to analyse drug action on these parasites. Motility was detected from larval parasites of Nippostrongylus brasiliensis and Ascaris suum in the absence and presence of various anti-nematodal drugs. These agents produced, within 48 h, a significant decrease in larval parasite motility. The instrument was also capable of detecting the motility of Caenorhabditis elegans, adult female Brugia pahangi and their response to anti-nematodal drugs. The design of the instrument allows us to accurately measure motility in a single sample within 60 sec.

PREVENTING AND TERMINATING PUPAL DIAPAUSE IN ATHRYCIA CINEREA (DIPTERA: TACHINIDAE)

1977 ◽  
Vol 109 (8) ◽  
pp. 1083-1090 ◽  
Author(s):  
H. G. Wylie
Keyword(s):  
High Temperature ◽  
Low Temperature ◽  
Adult Emergence ◽  
Larval Parasite ◽  
Long Day ◽  
Pupal Diapause ◽  
Young Parent ◽  
Diapause Incidence ◽  
Athrycia Cinerea ◽  
Bertha Armyworm

AbstractPupal diapause in Athrycia cinerea (Coq.), a larval parasite of bertha armyworm, Mamestra configurata Walk., was usually prevented if the parasite larvae were reared at 25°C, but not if they were reared at 20°C. Mature larvae of the parasite were more sensitive than younger larvae to this temperature effect. Diapause incidence in A. cinerea at 20°C was not reduced by using only young parent females for oviposition; by rearing the parent females at a high temperature (25°C) and long day (16 h) prior to and during oviposition; by using host larvae that had been light-programmed for non-diapause; or by increasing the photoperiod, to which the parasite larvae were exposed, from 12 to 16 h. Termination of pupal diapause was accelerated by low temperature; at least 24 weeks at 2 °C were required to synchronize adult emergence.

THE LIFE HISTORY OF THE AMBROSIA BEETLE XYLOTERINUS POLITUS (COLEOPTERA: SCOLYTIDAE)

1967 ◽  
Vol 99 (3) ◽  
pp. 285-299 ◽  
Author(s):  
David B. MacLean ◽  
Ronald L. Giese
Keyword(s):  
Head Capsule ◽  
Ambrosia Beetle ◽  
Head Width ◽  
Single Female ◽  
Larval Parasite ◽  
Gallery System ◽  
Variable Distance ◽  
History Of ◽  
Entrance Hole ◽  
Active Attack

AbstractHead capsule measurements of the ambrosia beetle Xyloterinus politus (Say) revealed three larval instars. The xylomycetophagous larvae lengthened their cradles and a positive correlation existed between head width and cradle length. A sex factor of 0.84 was in favor of the female adults. Dissection of active galleries revealed only a single female per gallery. Males were never seen to initiate or excavate a gallery and were forced from the entrance hole by the female when placed in an active attack. The gallery system studied was simple, the entrance hole penetrated into the sapwood for a variable distance before it branched into secondary tunnels at right angles to the main gallery.Eggs were laid singly in cup-shaped cradles excavated by the female. The cradle openings were plugged with frass throughout the duration of the immature stages. Callow adults emerged from the cradles by forcing the frass plug covering the entrance, and re-entered, their position reversed to feed upon the ambrosial fungus growing on the cradle walk X. politus overwintered as an adult in the old cradles and galleries. Larvae of Ipideurytoma sp. (Hymenoptera: Eurytomidae), probably a larval parasite of X. politus, were found in cradles.

Bionomics of Bracon ?hancocki (Wilkinson) (Hymenoptera: Braconidae), a Larval Parasite of Cydia Ptychora (Meyrick) (Lepidoptera: Tortricidae) in Nigeria

1982 ◽  
Vol 72 (4) ◽  
pp. 567-572 ◽  
Author(s):  
J. I. Olaifa ◽  
A. E. Akingbohungbe
Keyword(s):  
Life Cycle ◽  
Life Span ◽  
Larval Parasite ◽  
Preoviposition Period ◽  
Cydia Ptychora ◽  
Major Pest ◽  
Preferred Hosts

AbstractBracon ?hancocki (Wlkn.) is a larval ectoparasite of Cydia ptychora (Meyr.), a major pest of cowpea at Ile-Ife, Nigeria. Parasitism occurred in the field all the year round, varying from 0 to 65·9% and with the highest incidence from September to February. In the laboratory, the fecundity of the parasite was low, averaging about six eggs per female. The life-cycle was completed in ten days. Mating occurred soon after emergence, and the preoviposition period lasted about 2–3 days. Unmated females rarely laid eggs, and their life-span averaged six days as compared to 14 days for mated females. The female:male ratio was 2:1. The parasite rarely attacked previously paralysed hosts, and the preferred hosts were the older, larger larvae. A description of the egg and larvae is given.

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