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The Global ETD Search service is a free service for researchers
to find electronic theses and dissertations. This service is
provided by the
Networked Digital Library of Theses and Dissertations.
Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
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Showing 1 to 10 of 296 (0.082 seconds)Spelling suggestions: "subject:"test managemement"" "subject:"test managementment""
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The effect of a braconid ectoparasitoid, Bracon hylobii Ratz., on larval populations of the large pine weevil, Hylobius abietis LHenry, Cliff J. January 1995 (has links)
No description available.
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| 2 |
Management of insect pests of farmed-stored maize in Kenya, with particular reference to Prostephanus truncatus (Horn)Giles, Peter H. January 1998 (has links)
No description available.
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| 3 |
Interaction of the spotted stem border Chilo partellus (Swinhoe) with some alternative hosts and its larval parasitoid Cotesia sesamiae (Cameron) in MalawiPhiri, George S. N. January 1995 (has links)
No description available.
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| 4 |
The development of a cereal aphid advisory model and an oilseed rape pest advisory modelMann, Brian January 1991 (has links)
No description available.
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| 5 |
Conservation and ecology of the endemic Madeira Laurel pigeon, Columbia trocazOliveira, Paulo Jorge Santos Gomes January 2003 (has links)
No description available.
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| 6 |
Controlled droplet application of particulate suspensions of a carbamate insecticideBateman, Roy Peter January 1990 (has links)
No description available.
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| 7 |
Effects of Defoliation in Soybeans and Susceptibility of Soybean Loopers to Reduced Risk InsecticidesOwen, Lucas Neil 12 May 2012 (has links)
Insect defoliation thresholds were reevaluated to determine their effectiveness during vegetative and reproductive stages of soybean. Field experiments were planted with maturity group IV soybeans and subjected 17, 33, 66, and 100% defoliation during R3, R5, and R6 growth stages. In addition to different amounts of defoliation for each growth stage, defoliation occurring within different portions of the plant canopy was also evaluated. Results of this experiment confirmed that soybeans during R3 and R5 stages are more susceptible to yield loss at high levels (>57%) of defoliation than R6 growth stage. However, yield loss was not significantly different below 57% defoliation. No significant yield difference was observed from defoliation occurring in the top or bottom part of the canopy. Yield loss from various levels of defoliation during the vegetative stages was significant at V6. No yield loss was observed from defoliation during the V3 growth stage. Both maturity group IV and V soybeans behaved similarly to each level of defoliation. Results from these experiments were used to determine dynamic economic injury levels for each growth stage based on yield loss equations, value of the crop, and cost of control and can be used to make insecticide application recommendations based on the amount of defoliation at a particular reproductive growth stage. Soybean looper, Chrysodeixis includens (Walker), is an economic pest of soybeans that has developed resistance to several insecticide classes. New insecticides have recently been labeled for control of lepidopteran pests in soybeans, including soybean loopers. Field reference strains were collected in 2010 and 2011 from soybean fields in Mississippi and Louisiana and subjected to insecticide incorporated diet treated with flubendiamide, chlorantraniliprole, and methoxyfenozide. Susceptibility of soybean loopers to flubendiamide and chlorantraniliprole did not differ. However the overall susceptibility to methoxyfenozide was greater than chlorantraniliprole. Diet incorporated assays determined a 9.4 fold variation in susceptibility to flubendiamide among the seven soybean looper populations tested. Variation to chlorantraniliprole was 6.25 fold and variation for methoxyfenozide was 5.37 fold. These data can be used as a benchmark for referencing future soybean looper populations in Mississippi and Lousiana.
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Effect of the host plant on the susceptibility of crucifer pests to the insect pathogenic fungus, Metarhizium anisopliaeInyang, Enenwan N. January 1997 (has links)
No description available.
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| 9 |
Possible tritrophic consequences of high levels of host plant resistance (as in transgenic resistance) to aphids in BrassicaceaeGanguly, Subhendu January 1999 (has links)
No description available.
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| 10 |
Host plant resistance in sugarcane Saccharum officinarum to the lophophid planthopper Pyrilla perpusilla Walker (Homoptera: Lophopidae)Kumarasinghe, Nimal Chandrakantha January 1994 (has links)
No description available.
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