Biological Control Branch Station
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The propagation techniques and improvement of Parasitoid and Predatory natural enemies

Date:2014-06-17

Completion of three different specifications of the acrylic holder is removable to fixed lacewing and stinkbug in the installation of water and food utensils and could be achieved to prevent vibration dumping. When the delivery with a acrylic holder, the survival rate up to 100%. Without installed holder in the 30km delivery and the surviral rate of the first instar stinkbugs during 1st intar to adult was 79.7-95.2%, lacewings adults 92%;and over 300km, stink bug 33.7-93.2% and 82.5% for lacewing adult. Contain the petri dish with fresh fruit fly pupae and then put into boxes for rearing pupae of parasitoids are put a total of layer 5 or 6. More water vapor in the lower layer is obvious, especially in the bottom. it is than 30% in layer 5, more than 70% layer 6. If the bottom of the petri dish put the paper towels first, then the fruit fly pupae, which could be greatly alleviated. Pupae of parasitoids have been fitted with the oriental fruit fly pupae parasitized in the plastic box, easy to produce air-tight and there is water vapor. There will be a serious mildew that might affect the parasitoid emergence. If the 100 mesh gauze was replayed by 32 mesh, which could be alleviate these drawbacks. But there will still water vapor under high humidity. If 2mm thick cardboard placed firstly on the bottom of plastic boxes, which could be alleviated obviously. The higher the thickness of the fruit fly pupae is more easy to produce the phenomenon of water vapor. When it is up to 2cm, the water vapor increased significantly, and it is likely to affect the parasitoid emergence, and the emergence rate is lower are altitude increase.

 

 

different sizes of acrylic fixing instruments