| Autor: |
Jamwal, R, Sharma, PL, Verma, SC, Chandel, RS, Sharma, Nidhi |
| Předmět: |
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| Zdroj: |
International Journal of Tropical Insect Science; Jun2022, Vol. 42 Issue 3, p2473-2482, 10p |
| Abstrakt: |
Tuta absoluta (Meyrick) is one of the most devastating pests of tomato throughout the world and there is need to explore more ecofriendly options for its management. Consequently, the predatory potential of the bug, Blaptostethus pallescens Popp against T. absoluta and the intragulid predation on Trichogramma achaeae Nagaraja and Nagarkatti were studied. The predatory bug predated on the eggs and the first two larval stages of T. absoluta. During the nymphal stages, males and females of the predatory bug consumed almost same number of preys which varied with the prey stage, but the adult females were more voracious than males. During the lifetime, the females and males consumed an average of 756.2 and 400.2 prey eggs, 420.2 and 253.1 first instars and 73 and 71.4 s instar prey larvae, respectively. The pest-kill parameters like net kill rate (ko), true pest-kill rate (km), finite rate of pest kill (λ') and weekly kill rate (WK) of the predator were also higher on prey eggs than on larvae. Blaptostethus pallescens was also able to distinguish between Trichogramma achaeae-parasitized and unparasitized eggs of T. absoluta and Corcyra cephalonica both in choice and no-choice tests, and consumed selectively the unparasitised prey eggs. Manly's index of preference in each case was more than 0.9, confirming a strong preference for unparasitized prey eggs. These results indicate that the predatory bug is a potential biocontrol agent of T. absoluta and can be used compatibly with Trichogramma achaeae. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
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