Abstract
The role of inunudation by the egg parasitoid , Trichogramma evanescens West alone and combined with Agerin (Bacillus thuringiensis ) compared with recommended insecticides(Relidan and Somithion ) was evaluated against the honeydew moth (HDM) Cryptoblabes gnidiella Mill. infesting grape orchards in Mina region during two successive seasons of (2006 and 2007) .The results obtained showed that the highest general percentage of parasitism on HDM eggs was observed in grape orchard treated with egg parasitoid and Agerin (B.t.) together followed with those treated with only egg parasitoid, while it was nil in those treated with insecticides and untreated areas (control). Also spraying insecticides in grape orchard significant reduced the number of predators compared with the other two treatments. Furthermore , the release of the egg parasitoid plus spraying Agerin (B.t.) in grape orchards demonstrate the highest general mean percent reduction in infestation by C. gnidiella (67.65 and 68.99 %) followed with 63.39 and 44.56 % reduction in grape orchards treated with insecticides and 59.35 and 44.78 % reduction in those treated with the egg parasitoid alone compared to the untreated orchard in both years seasons, respectively. The statistical analysis showed significant difference between the effectiveness of the three tested control methods in reducing damage by this pest. Also, the costs of honeydew moth control compared with chemical treatments were reduced by 41.1% and 62.5 % in grape trees treated with egg- parasitoid combined with Agerin (B.t.) and only egg parasitoid , respectively. On the other hand, the percentage of increasing in grape fruit yield/tree was significantly higher in the grape orchards treated with egg parasitoid plus Agerin than (27.43 and 29.09 %) in those treated with egg parasitoid alone (21.90 and 22.77 %) and insecticides (25.45 and 24.27%) compared to the control ones in both seasons, respectively. These results seems to be of great significance when planning for control program against this pest.
Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 10
Claim · model-written summary
Parasitoid plus Agerin gave the highest honeydew moth egg parasitism, followed by parasitoid alone; insecticide and control orchards had none.
Verbatim
e0“highest general percentage of parasitism on HDM eggs was observed in grape orchard treated with egg parasitoid and Agerin (B.t.) together followed with those treated with only egg parasitoid, while it was nil in those treated with insecticides and untreated areas (control)”
Claim · model-written summary
Insecticide spraying significantly reduced predator numbers compared with biological treatments.
Verbatim
e0“spraying insecticides in grape orchard significant reduced the number of predators compared with the other two treatments”
Claim · model-written summary
Parasitoid plus Agerin reduced moth infestation by 67.65 and 68.99% in the two seasons.
- Taxon
- grapee0
- Treatment
- release of the egg parasitoid plus spraying Agerin (B.t.)e0
- Interactor
- C. gnidiellaCryptoblabes gnidiellae0pest
- Outcome
- infestation by C. gnidiellae0
- Direction
- reductione0
- Value
- 67.65 and 68.99 %e0
Not reportedComparator
Verbatim
e0“release of the egg parasitoid plus spraying Agerin (B.t.) in grape orchards demonstrate the highest general mean percent reduction in infestation by C. gnidiella (67.65 and 68.99 %)”
Claim · model-written summary
Insecticides reduced moth infestation by 63.39 and 44.56% in the two seasons.
Not reportedComparator
Verbatim
e0“63.39 and 44.56 % reduction in grape orchards treated with insecticides”
Claim · model-written summary
Parasitoid alone reduced moth infestation by 59.35 and 44.78% in the two seasons.
- Treatment
- egg parasitoid alonee0
- Outcome
- reductione0
- Direction
- reductione0
- Value
- 59.35 and 44.78 %e0
- Comparator
- untreated orcharde0
Not reportedTaxon
Verbatim
e0“59.35 and 44.78 % reduction in those treated with the egg parasitoid alone compared to the untreated orchard”
Claim · model-written summary
Combined parasitoid and Agerin control lowered costs by 41.1% relative to chemical treatments.
Verbatim
e0“costs of honeydew moth control compared with chemical treatments were reduced by 41.1% and 62.5 % in grape trees treated with egg- parasitoid combined with Agerin (B.t.) and only egg parasitoid , respectively”
Claim · model-written summary
Parasitoid alone lowered control costs by 62.5% relative to chemical treatments.
Verbatim
e0“costs of honeydew moth control compared with chemical treatments were reduced by 41.1% and 62.5 % in grape trees treated with egg- parasitoid combined with Agerin (B.t.) and only egg parasitoid , respectively”
Claim · model-written summary
Parasitoid plus Agerin increased grape yield per tree by 27.43 and 29.09% in the two seasons, more than comparison treatments.
- Taxon
- grapee0
- Treatment
- egg parasitoid plus Agerine0
- Outcome
- grape fruit yield/treee0
- Direction
- highere0
- Value
- 27.43 and 29.09 %e0
Not reportedComparator
Verbatim
e0“percentage of increasing in grape fruit yield/tree was significantly higher in the grape orchards treated with egg parasitoid plus Agerin than (27.43 and 29.09 %)”
Claim · model-written summary
Parasitoid alone increased grape fruit yield per tree by 21.90 and 22.77% in the two seasons.
Verbatim
e0“those treated with egg parasitoid alone (21.90 and 22.77 %) and insecticides (25.45 and 24.27%) compared to the control ones in both seasons, respectively”
e1“increasing in grape fruit yield/tree”
Claim · model-written summary
Insecticides increased grape fruit yield per tree by 25.45 and 24.27% in the two seasons.
Verbatim
e0“those treated with egg parasitoid alone (21.90 and 22.77 %) and insecticides (25.45 and 24.27%) compared to the control ones in both seasons, respectively”
e1“increasing in grape fruit yield/tree”
The same questions in other papers
biocontrol · pest · VitisPositive and negative results
2 papers in the same direction as this paper · 1 in the opposite direction
- negative
- positive
- positive
insecticide · ecology: diversity · VitisResults agree
1 paper in the same direction as this paper
- no effect
insecticide · yield · VitisResults agree
2 papers in the same direction as this paper
- positive
- positive
biocontrol · yield · VitisResults agree
3 papers in the same direction as this paper
- positive
- positive
- positive
biocontrol · control · VitisResults agree
4 papers in the same direction as this paper
- positive
- positive
- positive
1 paper more in this group
See all 5 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.