Importance of Nutritional and Physical Characteristics of Diets for Mass Rearing Screwworm & Pink...
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Transcript of Importance of Nutritional and Physical Characteristics of Diets for Mass Rearing Screwworm & Pink...
Importance of Nutritional and Importance of Nutritional and Physical Characteristics of Physical Characteristics of
Diets for Mass Rearing Diets for Mass Rearing Screwworm & Pink BollwormScrewworm & Pink Bollworm
Norman C. Leppla, Muhammad Norman C. Leppla, Muhammad F. Chaudhury &F. Chaudhury & Fred D. Stewart Fred D. Stewart University of Florida and USDAUniversity of Florida and USDA
New World ScrewwormNew World ScrewwormCochliomyia hominivoraxCochliomyia hominivorax
(Diptera:Calliphoridae)(Diptera:Calliphoridae)
Eggs on woundEggs on woundAdultsAdults
ScrewwormScrewworm Life CycleLife Cycle
Pupae in groundPupae in ground Larvae in woundLarvae in wound
Composition of Larval DietComposition of Larval Diet
Spray-dried bovine bloodSpray-dried bovine blood 6% 6%Spray-dried eggSpray-dried egg 4% 4%Milk substituteMilk substitute 4% 4%Gelling agentGelling agent (or 6% Cellulose) 2%(or 6% Cellulose) 2%Water (or 79.9% with cellulose) 83.9%Water (or 79.9% with cellulose) 83.9%FormalinFormalin 0.1% 0.1%
Spray Dried WholeSpray Dried Whole Bovine Blood Bovine Blood
ProteinProtein 85% 85%FatFat 1% 1%AshAsh 4.5% 4.5%FiberFiber 1% 1%MoistureMoisture 6% 6%
Egg PowderEgg Powder
Protein 50-58%Protein 50-58%Fat 25-30%Fat 25-30%Moisture 5% or lessMoisture 5% or lessCholesterol traceCholesterol traceVitamins A, BVitamins A, B1,2,6,12,1,2,6,12,D,E,D,E, Folate, BiotinFolate, BiotinMinerals Na, K, Ca, P, Mg,Minerals Na, K, Ca, P, Mg, Fe, Cu, Cl, I, ZnFe, Cu, Cl, I, Zn
Milk Powder SubstituteMilk Powder SubstituteProtein 20 gProtein 20 gFat 28 gFat 28 gCarbohydrate 42 gCarbohydrate 42 gMoisture 3 gMoisture 3 gAsh 3 g Ash 3 g Total Vitamins ~1 gTotal Vitamins ~1 g A, BA, B11, B, B22, B, B33, B, B66, B, B1212, Biotin, Biotin C, D, E, Folate, Pantothenic acid C, D, E, Folate, Pantothenic acid Minerals ~2.5 gMinerals ~2.5 g Calcium, Copper, Iodine, IronCalcium, Copper, Iodine, Iron Magnesium, PhosphorousMagnesium, Phosphorous Potassium, Sodium, Zinc Potassium, Sodium, Zinc
Physical CharacteristicsPhysical Characteristics
Role of gelling agent (or cellulose fiber)Role of gelling agent (or cellulose fiber) - Provide texture and matrix to diet- Provide texture and matrix to diet - Gel polymer is not bio-degradable- Gel polymer is not bio-degradable
- Cellulose is biodegradable- Cellulose is biodegradable Importance of viscosityImportance of viscosity
- Larval mobility and growth- Larval mobility and growth - Proper functioning of equipment- Proper functioning of equipment
Importance of pHImportance of pH -- pH change occurs during feedingpH change occurs during feeding - Feeding not effected between 6.8 & 5.5- Feeding not effected between 6.8 & 5.5
Larval Diet CompositionLarval Diet CompositionWheat germWheat germSugarSugarSoy flourSoy flourYeastYeastAnti-microbials (3)Anti-microbials (3)Vitamins(8)Vitamins(8)Choline chlorideCholine chlorideRed dyeRed dye
Successful Diet CharacteristicsSuccessful Diet Characteristics
Stimulate and enable feedingStimulate and enable feeding
Contain essential nutrientsContain essential nutrients
Organize ingredients in a matrixOrganize ingredients in a matrix
Nutrients biologically availableNutrients biologically available
• Chemically stable & cleanChemically stable & clean
• Eliminate anti-nutrients Eliminate anti-nutrients
• Easy to prepareEasy to prepare
• Easy to discard (biodegradable)Easy to discard (biodegradable)
• Provides a “happy” homeProvides a “happy” home
Successful Diet CharacteristicsSuccessful Diet Characteristics