Residual toxicity of some insecticides on Tuta absoluta (Lepidoptera: Gelechiidae) larvae under laboratory conditions
Journal Title: Journal of Entomological Society of Iran - Year 2021, Vol 41, Issue 2
Abstract
Tomato leaf miner (TLM), Tuta absoluta (Meyrick), is a destructive insect pest in greenhouses and fields on tomato plants. In this study, the efficacy of seven insecticides: spinosad (Laser®), chlorantraniliprole (Coragen®), indoxacarb (Steward®), abamectin (Vertimec®), metaflumizone (Alverde®), azadirachtin (NeemAzal®), and Bacillus thuringiensis was evaluated against T. absoluta during 30 days from spraying. Tomato plants were sprayed by half and a quarter of the recommended field concentrations of the insecticides. Thirty 2nd instar larvae were placed on the treated plants, 2, 4, 7, 10, 13, 17, 22, 26, and 30 days after treatment, and mortality was recorded 48 hours later. The results showed that spinosad and chlorantraniliprole in the half of the field recommended concentration caused maximum efficacy on T. absoluta larvae, 100 and 80 % mortality at the end of 30 days, respectively. On the other hand, indoxacarb caused 57 % mortality on the 22nd day after exposure to the quarter of the field recommended concentration. In the quarter field-recommended concentration, abamectin and metaflumizone also had moderate mortality (52 and 54 % on the 10th day). The application of these three compounds can be considered suitable for preventing an increasing pest population from reaching the economic injury level. Bacillus thuringiensis var. kurstaki and azadirachtin insecticides had slight mortality and short persistence on this pest. Experts and farmers can select the appropriate compounds to control this pest based on the pest population status according to the obtained results.
Authors and Affiliations
Zahra Nozad-Bonab, Solmaz Khani, Nariman Maroofpour, Shahzad Iranipour
Keywords
Related Articles
- EP ID EP706317
- DOI 10.22117/JESI.2022.356530.1433
- Views 74
- Downloads 0
Species of the genus Psylliodes Latreille (Coleoptera: Chrysomelidae, Galerucinae, Alticini) in the Canola fields of Guilan province with a new record for the Iranian fauna
Flea beetles (Coleoptera: Chrysomelidae, Galerucinae) are important pests of Canola, which the adult feedings on cotyledon cause severe damage to the crop. In this paper, Psylliodes Latreille species collected by sticky...
Hemocyte changes of larvae of the beet moth, Scrobipalpa ocellatella (Lepidoptera: Gelechiidae) affected by thermal stress
The hemocytes of insects are one of key components of immune system of insects against various stresses such as temperature changes. in hemolymph of Scrobipalpa ocellatella, Five types of identified hemocytes were prohem...
Nutritional indices and digestive proteolytic and amylolytic activities of Trogoderma granarium (Coleoptera: Dermestidae) on seed of different cereals
The khapra beetle, Trogoderma granarium (Everts), 1898 is one of the damaging pests of different stored cereal grains in Iran. In this research, effect of four cereal grain species including wheat (varieties N-91-9 and A...
Biology of cotton thistle leaf miner, Pegomya terebrans (Diptera: An-thomyiidae) in Urmia region, Iran
Field and laboratory surveys were carried out to study the biology of cotton thistle leaf miner, Pegomya terebrans (Rondani) in Urmia region. The results showed that the host plant species of this fly are restricted to t...
Life table, consumption rate and cold storage of Nabis pseudoferus (Hemiptera: Nabidae), the predator of agricultural crop pests
Nabis pseudoferus is a major biocontrol agent of sucking pests and caterpillars. Life history parameters, consumption rate and cold storage of N. pseudoferus on three diets; Aphis gossypii, Ephestia kuehniella eggs, and...