Abstract
The present study was aimed to evaluate six indigenous plant extracts for their ability to protect maize from infestation by maize weevil Sitophilus zeamais (M). The plant extracts were tested for its toxicity by fumigation and grain surface coating methods. Further, the effects of botanical treatments on F1 progeny, seed emergence and antifungal activities were studied. The results indicated that the extracts of Eicchornia crassipes controlled the test insect in grain surface coating method (100%, P = 0.05). Further, the same plant extract had significantly reduced the development of F1 progeny (97 ± 0.7%). In germination experiments, T + UEx samples showed normal seed germination of maize. However, in T + Ex samples, the seed germination depended on the grain protectant efficacy of the tested botanical extracts. Always higher percantage seed germination was recorded in those treatments where there was less infestation. Extracts of Carica papaya had significantly reduced the incidence of seed-borne fungus Aspergillus flavus (4 ± 2.4%) and did not affect the seed germination when compared to other treatments and untreated control.
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