Field and laboratory studies on the adults of Ascotis selenaria reciprocaria (WLK) Lep, geometridae), a pest of Arabica coffee in Kenya
In arabica coffee estates at Kahuguni and Magogoni, Kenya, female giant looper moths, Ascotis selenaria reciprocaria (Wlk.), rested on coffee tree stems at 60.7 + 9,8 cm above ground and males at 65.7 + 6.6 cm; most eggs were laid less than 122 cm above ground. In the laboratory, females laid on average 693 eggs in 5.3 batches; peak oviposition and fertility were 2-3 days after emergence. Life span was 8.3 days for females and 10.4 days for males; at death females contained 1.4 spermatophores each (1.1 in field-collected specimens). It is concluded that hand-picking of moths will have little control value unless done the day after emergence, but that tree-banding with residual insecticide 122-130 cm above ground kill 90 of the emerging larvae
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| Format: | biblioteca |
| Published: |
Feb
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| Subjects: | COFFEA ARABICA, INSECTOS DAÑINOS (TALLO), LEPIDOPTERA, REPRODUCCION, FERTILIDAD, OVIPOSICION, LARVAS, KENIA, ASCOTIS SELENARIA RECIPROCARIA, |
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| Summary: | In arabica coffee estates at Kahuguni and Magogoni, Kenya, female giant looper moths, Ascotis selenaria reciprocaria (Wlk.), rested on coffee tree stems at 60.7 + 9,8 cm above ground and males at 65.7 + 6.6 cm; most eggs were laid less than 122 cm above ground. In the laboratory, females laid on average 693 eggs in 5.3 batches; peak oviposition and fertility were 2-3 days after emergence. Life span was 8.3 days for females and 10.4 days for males; at death females contained 1.4 spermatophores each (1.1 in field-collected specimens). It is concluded that hand-picking of moths will have little control value unless done the day after emergence, but that tree-banding with residual insecticide 122-130 cm above ground kill 90 of the emerging larvae |
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