Efficiency of some control programs in controlling Thrips tabaci (Lindman) infesting garlic plants and resulted yield
Marwa AM Abd-Allah, Maha AM Tantawy, Fatina Baiomy
This study was conducted in Al-Zaytoun village - Beni Suef Governorate during two consecutive seasons 2018-2019 and 2019-2020, where five control programs were applied to reduce the population density of T. tabaci infesting garlic plants and obtaining the highest yield of heads. The results showed that the application of the five tested programs led to a decrease in the infestation of thrips and an increase the resulted yield when compared to the control, with significant differences between all treatments. The best results obtained after applying the 3rd program (Spinetoram and Emamectin benzoate) where the treated plants were exposed to the significantly lowest infestation of thrips, as the seasonal mean numbers for the two studied seasons were 27.67 and 25.00 individuals/ plant, respectively and produced the highest yield, as the average production of garlic heads for both seasons together was 10886.70 kg/ feddan. Although garlic plants which treated with 1st program were highly exposed to thrips during the two seasons (30.24 and 39.98 individuals/ plant respectively), it occupied second one in production, as it was the average head yield for both seasons is 10221.20 kg/ feddan. Results showed that the garlic plants that were received the 2nd program came in third place for infestation of thrips (34.31 and 44.15 individuals/ plant for the two seasons respectively) and also came in the third place for production, as they produced 10059.50 kg/ feddan for both seasons together. Applying 4th and 5th programs on garlic plants led to plants exposed to the highest significant infestation with thrips during the two seasons and produced the lowest production of garlic heads when compared to the other three control programs. The results confirmed that garlic plants that were not treated with any pesticides (control) were infested with the heaviest infestation of thrips during the two seasons (54.37 and 65.87 fled / plant, respectively, and produced the lowest significant yield of garlic heads, as the average production for both seasons was 5646.85 kg/ feddan. Finally, the results indicated that the application of the 1st program on garlic plants gave the highest net profit of 19382.40 LE / feddan, followed by the 3rd and 4th programs, where they gave the net profit of 18825.40 and 18437.40 LE/ Feddan. As for the applying of the 2nd and 5th programs, they gave the lowest net profit per feddan of 16631.10 and 16038.20 LE/ feddan. On the contrary, the garlic plants in the control (untreated plots) which produced the lowest production of garlic heads gave the lowest net profit when compared to all treatment, as they gave a net profit of 11293.70 LE /feddan.
Marwa AM Abd-Allah, Maha AM Tantawy, Fatina Baiomy. Efficiency of some control programs in controlling Thrips tabaci (Lindman) infesting garlic plants and resulted yield. International Journal of Entomology Research, Volume 6, Issue 2, 2021, Pages 175-181