Varietal resistance in maize against chemical control of stem-borer, shoot-fly and termites in Sahiwal, Punjab, Pakistan
2007
Ahmed, S. (University of Agriculture, Faisalabad (Pakistan). Dept. of Agricultural Entomology) | Obaid-ur-Rehman (Maize and Millet Research Inst., Sahiwal (Pakistan)) | Ahmad, F. | Riaz, M.A. | Hussain, A.
The chemical control integrated with varietal resistance against insect pests of maize (maize stem borer (Chilo partellus Swinhoe), shoot fly (Atherigona soccata Rond.) and termites was conducted to sort out the need for additional and separate control measure for termites in spring and autumn maize at "Maize and Millet Research Institute" Sahiwal. From a total of ten varieties (AG-2002, NX-8441, EV-1098, 7982, SWL-2002, 666, EV- 5098, Engro-2512, 34-N-43, 32-W-86) sown under Randomized Complete Block Design (RCBD), AG-2002 was considered resistant because termites' count (8.55), shoot fly (1.94%) and borer infestation (2.53%) was lowest and thus this variety was used in experiments of chemical control. The chemical control aimed against the termites with seed treatment (imidacloprid) and soil application of Lorsban 40EC could bring difference of infestation, between, before and after treatment, being 0.76 and 0 in case of shoot fly and borer, respectively. However, the termites' population increased with a difference of 6.86 times from pre- to post-treatment. Seed treatment alone was ineffective in reducing the termites' population. Application of fenpropathrin 10 EC @ 300ml, triazophos 40 EC @ 600 ml, furadan 3G @ 8 Kg and Lorsban 40EC @ 2 litre acre-1 could not bring a reduction in termites' population. It is concluded from the data that chemical control of borers' and shoot fly would have no effect on termites and vice versa. Therefore, termites should be controlled in maize apart from treatment for shoot fly and borer.
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