The significance of genetic polymorphisms within and between founder populations of Ceratitis capitata (Wied.) from Argentina. (33/60)

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Evaluation of yeasts and yeast products in larval and adult diets for the oriental fruit fly, Bactrocera dorsalis, and adult diets for the medfly, Ceratitis capitata, and the melon fly, Bactrocera curcurbitae. (34/60)

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Diversity of Bacillus thuringiensis strains isolated from citrus orchards in spain and evaluation of their insecticidal activity against Ceratitis capitata. (35/60)

A survey of Bacillus thuringiensis (Berliner) strains isolated from Spanish citrus orchards has been performed, and the strains were tested for insecticidal activity against the Mediterranean fruit fly Ceratitis capitata (Wiedemann), a key citrus pest in Spain. From a total of 150 environmental samples, 376 isolates were selected, recording a total B. thuringiensis index of 0.52. The collection was characterized by means of phase-contrast microscopy, SDS-PAGE, and PCR analysis with primer pairs detecting toxin genes cry1, cry2, cry3, cry4, cry5, cry7, cry8, cry9, cry10, cry11, cry12, cry14, cry17, cry19, cry21, cry27, cry39, cry44, cyt1, and cyt2. Diverse crystal inclusion morphologies were identified: bipyramidal (45%), round (40%), adhered to the spore (7%), small (5%), and irregular (3%). SDSPAGE of spore-crystal preparations revealed 39 different electrophoresis patterns. All primer pairs used in PCR tests gave positive amplifications in strains of our collection, except for primers for detection of cry3, cry19, cry39, or cry44 genes. Strains containing cry1, cry2, cry4, and cry27 genes were the most abundant (48.7%, 46%, 11.2%, and 8.2% of the strains, respectively). Ten different genetic profiles were found, although a total of 109 strains did not amplify with the set of primers used. Screening for toxicity against C. capitata adults was performed using both spore-crystal and soluble fractions. Mortality levels were less than 30%. We have developed a large and diverse B. thuringiensis strain collection with huge potential to control several agricultural pests; however, further research is needed to find out Bt strains active against C. capitata.  (+info)

Reproduction is adapted to survival characteristics across geographically isolated medfly populations. (36/60)

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Site-specific recombination for the modification of transgenic strains of the Mediterranean fruit fly Ceratitis capitata. (37/60)

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Cost of reproduction in male medflies: the primacy of sexual courting in extreme longevity reduction. (38/60)

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Selection of a Bacillus pumilus strain highly active against Ceratitis capitata (Wiedemann) larvae. (39/60)

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Sex and the single embryo: early deveiopment in the Mediterranean fruit fly, Ceratitis capitata. (40/60)

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