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Insect Pests Complex of Sunflower, Helianthus annuus L.

Author(s): S.A. Kakakhel | N. Islam | M. Amjad | M.A. Malik

Journal: Pakistan Journal of Biological Sciences
ISSN 1028-8880

Volume: 3;
Issue: 4;
Start page: 669;
Date: 2000;
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The most important species attacking the sunflower crop are whitefly (Bemisia tabaci Gennad.), plant hopper (Empoasca spp), cabbage semilooper (Thysanoplusia orichalcea F.), hairy caterpillar (Diacretia obliqua Walk.), green stink bug (Nezara viridula L.), Helicoverpa armigera Hubner and dusky bug (Nysius inconspicuus Distant.). The peak infestation of sucking pests, whitefly and plant hopper was observed in last week of May and first week of June, respectively on spring crop. Their population remained high upto the first week of October on autumn. Among the defoliators, the maximum population of cabbage semilooper was observed during the second week of April and again in the second week of September. The peak population of hairy caterpillar was recorded in the second week of October. However, the later pest did not appear during spring. Among the direct pests, the highest numbers of H. armigera Hubner was recorded in the first week of May. It did not attack during autumn. The highest population of dusk bug was noted in the first week of October as well as in the first week of June. These results, however, confirmed that whitefly is a serious pest on autumn sunflower while high population of plant hoppers during both the seasons caused more damage than that of whitefly. The present study also showed that cabbage semilooper may be a potential sunflower pest. The green stink bug and H. armigera Hubner. have found to be minor pests. The dusky bug might be classified as a serious pest of spring.

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