| Autor: |
Babu Naik, Vakudavath Chinna, Ghongade, Dilip Shriram, Supreeth, Gillesugur Sham, Gokte-Narkhedkar, Nandini, Prasad, Yenumula Gerard |
| Předmět: |
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| Zdroj: |
Biologia; Dec2023, Vol. 78 Issue 12, p3523-3532, 10p |
| Abstrakt: |
Pink bollworm (PBW), Pectinophora gossypiella is one of the major pests of cultivated cotton around the globe. Most of the attempts to control this pest by using chemical insecticides in crops have led to the evolution of numerous problems. Hence a suitable tool that addresses the problem will be a plausible way to manage the pest. The use of natural enemies may represent an effective alternative management tactic. Here, we study the parasitization potential of Bracon hebetor on different larval instars of P. gossypiella under laboratory condition. The release of B. hebetor at 30:50 (PBW larvae: parasitoid) and 30:40 ratios resulted in significantly higher level of parasitization on PBW larvae (85.8–94.2% in 2nd instar, 99.2–100% in 3rd instar and 100% in 4th instar of PBW) than with 30:30, 30:20 or 30:10 (PBW larvae: parasitoid) ratio (40.0–63.3% in 2nd instar, 47.5–78.3% in 3rd instar and 50.8–80.8% in 4th instar of PBW), respectively. Similarly, the survival of B. hebetor eggs demonstrated positive results, with up to 89.2% of parasitoid adults emerging from second-instar larvae when released in a ratio of 30:10. Additionally, on fourth-instar larvae, parasitoid emergence rates of 93.7% and 93.9% were observed for ratios of 30:10 and 30:20, respectively. This data indicates the host's suitability and the parasitoids high survivability. Lower number of eggs per larva was found to support a better survival of the parasitoid, with eggs ranging from 3.1 to 12.8 eggs per larvae and emergence of 7.9 to 93.9% at different ratios on all instars of PBW. The outcome of the present investigation is promising and suggests the parasitization and survival of B. hebetor is sufficient enough to manage the pest under controlled conditions and it is possibly an excellent candidate for augmentative biological control of PBW under field condition. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
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