Abstract
The problems"How many buds does an average pollen beetle damage per day and how may punctures does an average seed weevil make in the pods per day", were investigated by experiments in both field and laboratory. Small cages (net-sleeves in the field and plexi-glass tubes in the laboratory) were used to isolate single individuals. In the seed weevil experiments they were isolated on a raceme with flowers and at least 15 pods. In the pollen beetle experiment they were isolated on an inflorescence with at least 20 buds and no flowers. The number of seed weevil feeding punctures and number of ovipositions in the laboratory were found to depend on temperature and time. An equation using these parameters as variables was fitted to the data. This equation was able to predict the results from the field experiments with good precision. In the pollen beetle data there was a tendency towards a decrease in the number of damaged buds with time. A decrease in temperature also seemed to decrease the damage. The data were not consistent enough to fit into any equation. Average number of damaged buds was 1.19 and 2.28 buds/day/beetle for males and females, respectively
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Claims 6
Claim · model-written summary
Seed weevil feeding punctures and ovipositions in the laboratory depended on temperature and time.
- Taxon
- seed weevilt0
- Treatment
- temperature and timee1
- Outcome
- number of seed weevil feeding punctures and number of ovipositionse1
- Setting
- in the laboratorye1
Not reportedDirection
Verbatim
t0“seed weevil (Ceutorrhynchus assimilis Payk) and the pollen beetle (Meligethes aeneus F.)”
e1“The number of seed weevil feeding punctures and number of ovipositions in the laboratory were found to depend on temperature and time”
Claim · model-written summary
The fitted equation predicted field results of seed weevil damage with good precision.
Verbatim
t0“seed weevil (Ceutorrhynchus assimilis Payk) and the pollen beetle (Meligethes aeneus F.)”
e2“This equation was able to predict the results from the field experiments with good precision”
Claim · model-written summary
Pollen beetle damaged buds showed a tendency to decrease with time.
Verbatim
t0“seed weevil (Ceutorrhynchus assimilis Payk) and the pollen beetle (Meligethes aeneus F.)”
e3“In the pollen beetle data there was a tendency towards a decrease in the number of damaged buds with time”
Claim · model-written summary
A decrease in temperature seemed to decrease pollen beetle damage.
Verbatim
t0“seed weevil (Ceutorrhynchus assimilis Payk) and the pollen beetle (Meligethes aeneus F.)”
e4“A decrease in temperature also seemed to decrease the damage”
Claim · model-written summary
Males of pollen beetle damaged on average 1.19 buds per day.
Verbatim
t0“seed weevil (Ceutorrhynchus assimilis Payk) and the pollen beetle (Meligethes aeneus F.)”
e5“Average number of damaged buds was 1.19 and 2.28 buds/day/beetle for males and females, respectively”
Claim · model-written summary
Females of pollen beetle damaged on average 2.28 buds per day.
Verbatim
t0“seed weevil (Ceutorrhynchus assimilis Payk) and the pollen beetle (Meligethes aeneus F.)”
e5“Average number of damaged buds was 1.19 and 2.28 buds/day/beetle for males and females, respectively”