Effect of host plants on developmental and population parameters of invasive leafminer, Tuta absoluta (Meyrick) (Lepidoptera: Gelechiidae)
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Tuta absoluta (Meyrick) (Lepidoptera: Gelechiidae) is one of the most serious pests of tomato, capable of causing 100% crop losses under favourable conditions. We studied the effect of different host plants on developmental and population parameters of this pest at 25 ± 0.5 °C temperature, 70 ± 5% relative humidity and 12 L: 12D photoperiod. Host plant had significant effect on the developmental biology and the population growth parameters of the pest. The leafminer developed fastest on tomato leaves and slowest on potato tubers. Population growth parameters like intrinsic rate of increase, net reproductive rate, finite rate of increase, doubling time and weekly multiplication rate of T. absoluta were highest on tomato leaves and lowest on potato tubers. Mean generation time was minimum on tomato leaves and maximum on potato tubers. Females developed on tomato leaves were more fecund than other hosts. Though, tomato was found to be the most suitable host plant of T. absoluta, yet, the pest developed and grew successfully on other alternate hosts like potato (Solanum tuberosum L.), brinjal (Solanum melongena L.) and pepino (Solanum muricatum Aiton). These hosts can, therefore, play an important role in the survival, population build up and overwintering of the miner. Further, under favourable conditions the miner can become a serious pest on these crops and need to be monitored on these crops as well.
KeywordsFood plants Reproduction Solanaceous plants Survival Tomato leafminer
The authors are thankful to the Indian Council of Agricultural Research, New Delhi, India for providing funds through All India Coordinated Research Project on Biological Control of Crop Pests and weeds and the Professor and Head, Department of Entomology, YSP University of Horticulture and Forestry, Nauni, Solan (HP) India for providing necessary facilities.
Compliance with ethical standards
Conflict of interest
There is no conflict of interest among the authors.
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