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6. PPQ Insectary Sites in North Dakota.  Keith Winks, USDA-APHIS-PPQ, PO Box 2157, Bismarck, North Dakota 58502

PPQ insectary sites began in 1989. We started with two caged sites. The first releases made were with nigriscutis at one site and cyparissiae and flava at the other site. Neither one of these sites had done particularly well, but some insects were found at both sites before we terminated the sites. In 1990 we did releases at 15 sites. Several of these sites are producing where collections are now being made.

One of the 1990 sites is a flava site and is a producing insectary. This year the site was grazed to almost nothing by sheep. There was no spurge showing. We thought the site was lost. In July, the spurge started to grow back. We sampled the site and flava was found in large enough numbers so we were able to collect several thousand beetles.

We have six APHIS insectary sites that we could have made collections from this year. Due to the tremendous number of insects at the Valley City and Minot, sites most of our resources were directed at these two sites. 99% of the insects were collected from these two sites. We helped collect and distribute approximately 2 1/2 million insects this year. This included nigriscutis, czwalinae, and flava. This work was accomplished at four field days from 6-29 through 7-12. The insects were given to county weed boards, state and federal agencies, and some private individuals.

Everyone wants beetles. However, everyone must realize this is an integrated approach and all the tools available to combat leafy spurge should be used.

APHIS has 41 insectaries. We will drop 17 sites. They are not producers. If our cooperators want to maintain these insectaries they can.

This is a great program to be involved with. Fifteen years ago many people were in despair. They thought there was no hope. Now they have smiles on their faces. With all the tools that are coming into place, leafy spurge will not be a major problem in the future.

Field Day Activities - 1995

Gladstone6-29-95376,000 Nigriscutis
130,000 Czwalinae
506,000 Total
 
Mandan6-28-95253,000 Nigriscutis
158,000 Czwalinae
411,000 Total
 
Minot
 
7-6-95
 
759,600 Nigriscutis Total
 
Valley City7-12-9564,000 Nigriscutis
678,000 Czwalinae
742,000 Total
 
2,418,600 Total Redistribittion

PPQ SITES HARVEST 1995

Nigriscutis

Stark County - Gladstone6-29-9515,000
7-10-955,000
Morton County - GMA6-14-955,000
7-10-9565,000
Sioux County7-18-9520,000

Flava

Burleigh County7-17-9510,000
7-10-954,000

1995 PPQ DISTRIBUTION

48 Counties Total
Missing:
Divide
Cavalier
Grand Forks
Pierce
Ramsey

10 Government Agencies

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