Linked Life Data

10985022

Source:http://linkedlifedata.com/resource/pubmed/id/10985022

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
4
pubmed:dateCreated
2000-10-20
pubmed:abstractText
Field studies were conducted in 1996 and 1997 to reevaluate the use of augmentative releases of Trichogramma wasps for heliothine management in cotton. In 1996, nine releases of Trichogramma exiguum Pinto & Platner, spaced 3-4 d apart, were made into three 0.4-ha cotton plots. Six weekly releases were made in 1997, each containing two T. exiguum cohorts developmentally staggered by 45 degrees C degree-days. Field release rates, estimated from laboratory and field quality control data, averaged 108,357 T. exiguum female female per hectare per cohort per release in 1996 and 193,366 female female per hectare per cohort per release in 1997. In 1996, mean +/- SD adult emergence under laboratory conditions for released cohorts was 92 +/- 7%; 62 +/- 5% of emerged adults were females, 3 +/- 2% of females displayed brachyptery (nonfunctional wings), mean female longevity under laboratory conditions was 15 +/- 4 d, and mean +/- SD field emergence was 97 +/- 2%. Quality control measurements were similar in 1997. In 1996, mean +/- SD percent parasitism of heliothine eggs in field plots on the sampled dates ranged from 67 +/- 4 to 83 +/- 5% in T. exiguum release plots and 25 +/- 9 to 55 +/- 8% in control plots. In 1997, parasitism levels ranged from 74 +/- 4 to 89 +/- 5% in T. exiguum release plots and 18 +/- 18 to 69 +/- 11% in control plots. Despite increased parasitism levels in T. exiguum release plots, there were no significant differences in density of fifth instars, boll damage, or yield between T. exiguum release and control plots. Therefore, it is concluded that Trichogramma augmentation is not an effective heliothine management tool in North Carolina cotton.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:status
MEDLINE
pubmed:month
Aug
pubmed:issn
0022-0493
pubmed:author
pubmed:issnType
Print
pubmed:volume
93
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
1127-36
pubmed:dateRevised
2007-11-15
pubmed:meshHeading
pubmed:year
2000
pubmed:articleTitle
Trichogramma exiguum (Hymenoptera: Trichogrammatidae) releases in North Carolina cotton: evaluation of heliothine pest suppression.
pubmed:affiliation
Department of Entomology, North Carolina State University, Raleigh 27695-7613, USA.
pubmed:publicationType
Journal Article