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Autore principale:	Luis Miguel Hernández Mahecha
Natura:	Artículo científico
Lingua:	es
Pubblicazione:	Universidad Nacional de Colombia 2016
Soggetti:	Agrociencias marcaje recaptura Trialeurodes vaporariorum
Accesso online:	https://www.redalyc.org/articulo.oa?id=169943143013
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Efecto del viento en la dispersión a corta distancia del parasitoide Amitus fuscipennis MacGown y Nebeker (Hymenoptera: Platygasteridae) en cultivos de fríjol y habichuela Luis Miguel Hernández Mahecha Maria del Rosario Manzano Agrociencias marcaje recaptura Trialeurodes vaporariorum El parasitoide Amitus fuscipennis MacGown y Nebeker (Hymenoptera: Platygasteridae) es un agente de control biológico promisorio de la mosca blanca de los invernaderos Trialeurodes vaporariorum (Westwood) (Hemiptera: Aleyrodidae), no obstante no se conoce la distancia ni el efecto del viento en la dispersión del parasitoide en culti - vos. Por tanto, el objetivo de este estudio fue determinar la distancia y dirección del proceso inicial de dispersión de A. fucipennis en cultivos de frijol y habichuela infestados con T. vaporariorum . Adultos del parasitoide fueron marcados con fluorocromo rojo y recapturadas en trampas pegajosas amarillas de 1, 1.5 y 2 m de altura ubicadas a 4, 8 y 12 m de distancia del punto de liberación, respectivamente. Los resultados mostraron que A. fuscipennis se dispersó hasta 12 m sin diferencias (P > 0.05) en el promedio de adultos recapturados en las tres distancias probadas. La tasa promedio de recaptura fue de 2.06 % y la mayor tasa ocurrió en dirección Este (15.08%) lo que sugieren que el parasitoide se dispersa más de 12 m y que el viento contribuye a la dispersión pasiva una vez que el insecto inicia el vuelo. El parasitoide se dispersó preferiblemente en la dirección del viento predomi - nante en latitudes bajas de los Andes. Estos aspectos son relevantes al momento de liberar A. fuscipennis en un agro-paisaje andino con combinación de cultivos atacados y no atacados por T. vaporariorum para disminuir la dispersión del parasitoide hacia otros cultivos. 2016 artículo científico 0120-2812 https://www.redalyc.org/articulo.oa?id=169943143013 es http://www.redalyc.org/revista.oa?id=1699 Acta Agronómica application/pdf Universidad Nacional de Colombia Acta Agronómica (Colombia) Num.1 Vol.65

if (filemtime($filename) + $maxlifetime < time()) { unlink($filename); $count++; } } return $count; } /** * A function that is called internally when session data is to be saved. * * @param string $sessId The current session ID * @param string $data The session data to write * * @return bool */ protected function saveSession($sessId, $data): bool { $sessFile = $this->path . '/sess_' . $sessId; if ($handle = fopen($sessFile, 'w')) { $return = false; // Lock the file for exclusive access to avoid issues with multiple // processes writing session simultaneously: if (flock($handle, LOCK_EX)) { $return = fwrite($handle, $data); // Make sure that there's no trailing data by truncating the file to // the correct length: ftruncate($handle, strlen($data)); fflush($handle); flock($handle, LOCK_UN); } fclose($handle); if ($return !== false) { return true; } } // If we got this far, something went wrong with the file output... // It is tempting to throw an exception here, but this code is called // outside of the context of exception handling, so all we can do is // echo a message.

// Anecdotal testing Today and Yesterday seems to indicate destroy() // is called by the garbage collector and everything is good. // Something to keep in mind though. return 0; } /** * Write function that is called when session data is to be saved. * * @param string $sessId The current session ID * @param string $data The session data to write * * @return bool */ public function write($sessId, $data): bool { if ($this->writesDisabled) { return true; } return $this->saveSession($sessId, $data); } /** * A function that is called internally when session data is to be saved. * * @param string $sessId The current session ID * @param string $data The session data to write * * @return bool */ abstract protected function saveSession($sessId, $data): bool; }

* * @return void */ public function writeClose() { // The assumption is that we're using PHP's ext/session. // session_write_close() will actually overwrite $_SESSION with an // empty array on completion -- which leads to a mismatch between what // is in the storage object and $_SESSION. To get around this, we // temporarily reset $_SESSION to an array, and then re-link it to // the storage object. // // Additionally, while you _can_ write to $_SESSION following a // session_write_close() operation, no changes made to it will be // flushed to the session handler. As such, we now mark the storage // object isImmutable. $storage = $this->getStorage(); if (! $storage->isImmutable()) { $_SESSION = $storage->toArray(true); session_write_close(); $storage->fromArray($_SESSION); $storage->markImmutable(); } } /** * Attempt to set the session name * * If the session has already been started, or if the name provided fails * validation, an exception will be raised. * * @param string $name * @return SessionManager * @throws Exception\InvalidArgumentException */ public function setName($name) { if ($this->sessionExists()) { throw new Exception\InvalidArgumentException( 'Cannot set session name after a session has already started'

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