Abstract
AbstractTomato leaf miner, Tuta absoluta (Lepidoptera: Gelechiidae), is a serious insect pest on tomato plants worldwide. Its larvae can cause up to 100% damage if not controlled. Furthermore, using of chemical pesticides is causing serious threat to environment and human health. The effect of two photosensitizers; magnesium and copper chlorophyllin (Mg-Chl and Cu-Chl) alone and two nanomaterials (GO and Ag) over their photosensitizers (Mg-Chl /Go, Mg-Chl /Ag, Cu-Chl/ Go, and Cu-Chl /Ag) on T. absoluta in tomato field at two seasons were studied. The tested concentrations of photosensitizer and nanocomposites were 10−3 (100 ml/L), 10−4 (10 ml/L) and 10–5 (1 ml/L). The effect of photosensitizer and nanocomposites on reduction % of Tuta absoluta, tomato plants growth, yield, and quality were studied. The number of tunnels was recorded, the reduction percentages for each treatment were calculated compared to control before and after 1, 5, and 7 days of spraying. Results showed that the reduction in the number of tunnels after one day of spraying with photosensitizers (Mg-Chl and Cu-Chl) at the highest concentration (10−3) was 72.79 and 70.52% in the 1st season and 77.95 and 60.08% in the 2nd season. The reduction percentage increased gradually with the number of days after spraying and reached 100% after seven days in both seasons. The reduction percentage reached 100% in plants treated with all nanomaterial concentrations after five days of spraying in the 1st season and after one day of spraying in the second season. Photosensitizer and nanocomposites treatments at all concentrations positively affected all vegetative growth parameters of tomato plants compared with insecticides and control. The highest concentration of all treatments increased yield and enhanced the storability of tomato fruits. The yield after treatment with Mg-Chl was 28.67 tons/fed, which was more than the yield of those treated with Cu-Chl (24.8 tons/fed). Loading nano silver (Ag) over Mg-Chl achieved tomato yield (35.18 tons/fed) compared with the loading of nano graphene oxide (Go) (32.95 tons/fed). Therefore, treatment with these materials can be recommended in the IPM program to control T. absoluta in tomato fields.
Publisher
Springer Science and Business Media LLC
Reference61 articles.
1. Abbas MM (2020) Enhancement of the nutrients efficiency and productivity of tomato (Lycopersicum esculentum mill.) Plants by using nano silver. Plant Arch 20(2):4242–4244
2. Abbas WT, Abbas HH, Abdel-Shafy S, Shaapan RM, Ahmed SS, Abdel-Kader MH (2022) Evaluation of using of some novel natural nano-pesticides on fish health and water physico-chemical parameters. Egypt J Aquat Biol Fish 26(2):31–44
3. Abd El-Naby SM (2019) Toxicity of chlorophyllin compound on field and susceptible strains of Spodoptera littoralis, and its biochemical impact on α, β and acetylcholinesterases. Egypt J Agric Res 97(1):89–100
4. Abd El-Rahman SF, Khalil SSH, Ahmed SS (2019) Laboratory evaluation of photosensitizers against cotton leaf worm, Spodoptera littoralis (Boisd.) (Lepidoptera: Noctuidae). Acad J Entomol 12(3):61–69
5. Abouelkassem S, El-Borady OM, Mohamed MB (2017) Towards using of new and safety nanomaterials against tomato leafminer, Tuta absoluta (Mayrick) in tomato under field conditions. J Nanomed Nanotechnol 8(7):39