BILOGICAL EFFECT OF Beauvera bassiana (Bals.) Vuill. ON THE FIRST LARVAL INSTAR OF TOMATO LEAF MINOR Tuta absoluta (Meyrick)

Merza, Saeed; Abdullah, Suaad I.

doi:10.33899/magrj.2018.161434

	BILOGICAL EFFECT OF Beauvera bassiana (Bals.) Vuill. ON THE FIRST LARVAL INSTAR OF TOMATO LEAF MINOR Tuta absoluta (Meyrick)
Mesopotamia Journal of Agriculture
Article 24, Volume 46, Issue 1, 2018, Pages 231-238 PDF (495.3 K)
Document Type: Research
DOI: 10.33899/magrj.2018.161434
Authors
Saeed Merza^* ¹; Suaad I. Abdullah²
¹Plant Protection Dept. Faculty of Agric. & Forestry Duhok University. Iraq
²Plant Protection Dept. College of Agric.& Forestry/ Mosul University. Iraq
Abstract
Study were conducted to evaluate the biological effect of Beauveria bassiana with four concentrations (10⁵, 10⁶, 10⁷and 10⁸) spores/ ml after two exposure times (one & two day) and two application methods as biocontrol agents against tomato leaf miner 1^st instar larvae and its residual effect on other stages. Results indicated that B. bassiana was pathogenic to the first instar larvae of tomato leaf miner although. Its capability differed according to the application method, fungus concentration and exposure duration. The larval mortality percentages increased significantly with B. bassiana at 10⁸ spores/ ml. to reach 58.146% and 40% for larvae directly sprayed and larvae feed on tomato leaves sprayed with B. bassiana conidial suspension respectively. The results also showed that B. bassiana had a residual effect on the survivous larvae after treatment, that the lowest adult emergency percentage was 0.00% from the first instar larvae treated directly with B. bassiana conidial suspension at both 10⁷and 10⁸ spores/ml. compared with 96.66 % in control treatment.
Keywords
Tomato moth Tuta absoluta; Beauveria bassiana; first larval instar; adult emergency

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