Effects of feeding two host plants on growth and development and detoxification enzyme activity of Tuta absoluta
[Objective]The aim of this study was to investigate the potential for tomato leaf miners to feed on and transition to harming potatoes,leading to the development of a scientifically sound strategy for field control of this pest.[Method]Two host plants,tomato(Lycopersicon esculentum)and potato(Sola-num tuberosum),were chosen to examine the developmental timeframe and survival rate of tomato leaf min-ers after feeding on different hosts.The activities of carboxylesterase,cytochrome P450,and glutathione S-transferase were assessed at 12 hours,24 hours,and 48 hours post-feeding.[Result]The larval develop-mental period,adult lifespan,and larval survival rate of tomato leaf miners were significantly higher than those of potato leaf miners(P<0.05).However,no variations were observed in the egg stage,pupal stage,pupal weight,female pupa ratio,egg hatching rate,emergence rate,and oviposition quantity.Following feed-ing on both host plants,the three detoxification enzyme activities of tomato leaf miners increased after con-suming potato leaves and decreased after consuming tomato leaves,with potato leaf miner enzyme activities surpassing those of tomato leaf miners.[Conclusion]Feeding on tomatoes favored the growth of tomato leaf miners,indicating a greater affinity of tomato leaf miners for tomatoes over potatoes.Post-feeding on the two host plants,variations in the activity levels of different detoxification enzymes in tomato leaf miners were observed,reflecting a correlation with host plant feeding preferences.Host plants with higher feeding suitability exhibited minimal changes and lower detoxification enzyme activity levels,while those less suit-able experienced rapid changes and higher enzyme activity levels.
Tuta absolutadifferent hostgrowth and developmentdetoxifying enzymesdiversion harm
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