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2022 Volume 1 Issue 5
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REN Liyun, DONG Huiying, WEI Jiguang. The Effects of Different Soil Fertility on Composition of Soluble Organics of Cucumber and Occurrence of Thrips palmi[J]. PLANT HEALTH AND MEDICINE, 2022, (5): 79-87. doi: 10.13718/j.cnki.zwyx.2022.05.009
Citation: REN Liyun, DONG Huiying, WEI Jiguang. The Effects of Different Soil Fertility on Composition of Soluble Organics of Cucumber and Occurrence of Thrips palmi[J]. PLANT HEALTH AND MEDICINE, 2022, (5): 79-87. doi: 10.13718/j.cnki.zwyx.2022.05.009
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The Effects of Different Soil Fertility on Composition of Soluble Organics of Cucumber and Occurrence of Thrips palmi

  • 1. College of Agricultural Engineering, Guangxi Vocational University of Agriculture, Nanning 530007, China;

  • 2. College of Agriculture, Guangxi University, Nanning 530005, China;

  • 3. College of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, China

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  • Received Date: 11/07/2022

  • MSC: S158.3;S642.2

  • Soil fertility affects not only the physiological indexes of crops, but also the growth and development of insects that inhibit and feed on crops, and finally affects the development of insect populations. To evaluate the effects of different soil fertility on Thrips palmi population, the contents of soluble organic matter(reducing sugar, total soluble sugar, soluble protein, lipids, free amino acids, flavonoids and total phenols) in cucumber leaves were studied under three levels of nitrogen, phosphorus and potassium fertilizers applications. Five-point sampling method was used to investigate the differences in the number of Thrips palmi.The results showed that the content of free amino acids in cucumber leavessignificantly increased with the increasing doses of nitrogen and phosphorus fertilizer, but did not increase with increasing doses of potassium fertilizer. Increase of nitrogen fertilizer significantly increased the number of adult thrips and eggs on the epical leaves, which was highly positively correlated with the increase of free amino acid content in epical leaf of cucumber. There was a high positive correlation between the number of nymphs on the middle leaf and the content of free amino acids in the middle leaf. The number of adults on epical leaf increased significantly with the increase of the dose of P fertilizer, and the number of eggs on epical leaf and nymphs feeding on middle leaf increased first and then decreased. The content of free amino acids in the parietal leaf was moderately positively correlated with the number of adults on the epical leaf. The increase of potassium fertilizer dose only caused a significant increase in the number of adults on the epical leaf, but no significant changes in the number of eggs laid on the epical leaf and nymphs on the middle leaf. The contents of flavonoids and total phenols in epical leaf were not significantly affected by the application of N, P and K fertilizer. These results indicated that the increase of free amino acid content in leaves caused by nitrogen and phosphorus fertilizer application was an important factor promoting the increase of the number of T. palmi. The content of free amino acid is also an important factor to determine whether cucumber has insect resistance. Total phenols and flavonoids had no effect on insect resistance.
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The Effects of Different Soil Fertility on Composition of Soluble Organics of Cucumber and Occurrence of Thrips palmi

  • Received Date: 11/07/2022

Abstract: Soil fertility affects not only the physiological indexes of crops, but also the growth and development of insects that inhibit and feed on crops, and finally affects the development of insect populations. To evaluate the effects of different soil fertility on Thrips palmi population, the contents of soluble organic matter(reducing sugar, total soluble sugar, soluble protein, lipids, free amino acids, flavonoids and total phenols) in cucumber leaves were studied under three levels of nitrogen, phosphorus and potassium fertilizers applications. Five-point sampling method was used to investigate the differences in the number of Thrips palmi.The results showed that the content of free amino acids in cucumber leavessignificantly increased with the increasing doses of nitrogen and phosphorus fertilizer, but did not increase with increasing doses of potassium fertilizer. Increase of nitrogen fertilizer significantly increased the number of adult thrips and eggs on the epical leaves, which was highly positively correlated with the increase of free amino acid content in epical leaf of cucumber. There was a high positive correlation between the number of nymphs on the middle leaf and the content of free amino acids in the middle leaf. The number of adults on epical leaf increased significantly with the increase of the dose of P fertilizer, and the number of eggs on epical leaf and nymphs feeding on middle leaf increased first and then decreased. The content of free amino acids in the parietal leaf was moderately positively correlated with the number of adults on the epical leaf. The increase of potassium fertilizer dose only caused a significant increase in the number of adults on the epical leaf, but no significant changes in the number of eggs laid on the epical leaf and nymphs on the middle leaf. The contents of flavonoids and total phenols in epical leaf were not significantly affected by the application of N, P and K fertilizer. These results indicated that the increase of free amino acid content in leaves caused by nitrogen and phosphorus fertilizer application was an important factor promoting the increase of the number of T. palmi. The content of free amino acid is also an important factor to determine whether cucumber has insect resistance. Total phenols and flavonoids had no effect on insect resistance.

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