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Insects.
5
Biological pest control agents.
5
Weeds.
4
Leafy spurge.
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1990
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1990 Leafy Spurge Symposium Proceedings
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Subject: Insects.
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The biological control of leafy spurge-1990
(
1990
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Successful laboratory mass rearing of the gall midge, Spurgia esulae Gagne, for field release
(
1990
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Progress report on field and quarantine research toward biological control of leafy spurge with phytophagous insects
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1990
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Travel to the USSR to collect biological control agents of weeds
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1990
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1989 redistribution of insects attacking leafy spurge
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1990
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