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Efficacy of dodonaea viscosa plant extract on some insect pests infesting cotton plants under field conditions [electronic resources].

By:

Mogahed, M. I

Contributor(s):

Gesraha, M. A

Language: English Summary language: Arabic Description: p.739-747Other title:

فعالية مستخلص نبات الدودنيا ضد بعض الآفات الحشرية التي تصيب نباتات القطن تحت ظروف الحقل.‪‪‪ [Added title page title]

Uniform titles:

Annals of agricultural science, 2005 v. 50 (2) [electronic resource].

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In: Annals of Agricultural Science 2005.v.50(2)Summary: Cotton plants var. Moubarak-93 are attacked during their growing stages (from seedling till harvest) with many insect pests such as Aphis gossypii, Bemisia gossypiperda (Bemisia tahaci) and Thrips tabaci as well. Early cotton cultivation (March 10), caused low infestation with aphids, whitefly and thrips, while late cultivation (April 8) caused high infestation with these insect pests. No significant differences were noticed between cultivated dates and infestation percentages as a whole, or the infestation percentage with cotton bollworms. Application of Dodonaea viscosa plant extract mixed with kerosene significantly reduced infestations of cotton seedlings with aphids, whitefly and thrips. However, highly significant differences were recorded between the percent of infestation of untreated cotton (check) and those treated with Dodonia extract. On the other hand, highly signific2LDt difference was recorded between infestation percentages of cotton bolls with pink and spiny bollworms on the untreated cotton plants and those treated with Dodonia extract but no significant difference was found in case of American bollworm attacking bolls of treated and untreated cotton plants. Increasing the extract concentration increased the repellent effect against cotton bollworms adults for IS days following treatment. Difference between the average number of predators on the treated and untreated plants was insignificant.

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Cotton plants var. Moubarak-93 are attacked during their growing stages (from seedling till harvest) with many insect pests such as Aphis gossypii, Bemisia gossypiperda (Bemisia tahaci) and Thrips tabaci as well. Early cotton cultivation (March 10), caused low infestation with aphids, whitefly and thrips, while late cultivation (April 8) caused high infestation with these insect pests. No significant differences were noticed between cultivated dates and infestation percentages as a whole, or the infestation percentage with cotton bollworms. Application of Dodonaea viscosa plant extract mixed with kerosene significantly reduced infestations of cotton seedlings with aphids, whitefly and thrips. However, highly significant differences were recorded between the percent of infestation of untreated cotton (check) and those treated with Dodonia extract. On the other hand, highly signific2LDt difference was recorded between infestation percentages of cotton bolls with pink and spiny bollworms on the untreated cotton plants and those treated with Dodonia extract but no significant difference was found in case of American bollworm attacking bolls of treated and untreated cotton plants. Increasing the extract concentration increased the repellent effect against cotton bollworms adults for IS days following treatment. Difference between the average number of predators on the treated and untreated plants was insignificant.

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