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Response of cotton mealybug, Phenacoccus Solenopsis Tinsley (Sternorrhyncha: Pseudococcidae) to predators, neem oil, and synthetic insecticide under semi-field and field conditions
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Response of cotton mealybug, Phenacoccus Solenopsis Tinsley (Sternorrhyncha: Pseudococcidae) to predators, neem oil, and synthetic insecticide under semi-field and field conditions
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Response of cotton mealybug, Phenacoccus Solenopsis Tinsley (Sternorrhyncha: Pseudococcidae) to predators, neem oil, and synthetic insecticide under semi-field and field conditions
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Journal Article
Response of cotton mealybug, Phenacoccus Solenopsis Tinsley (Sternorrhyncha: Pseudococcidae) to predators, neem oil, and synthetic insecticide under semi-field and field conditions
2024
Overview
Mealybugs of the genus
Phenacoccus
attack a wide variety of crops, fruits, vegetables, ornamentals and weeds but cotton is the prime target. In current investigations, two trials were carried out under semi-field and field conditions for two consecutive years to investigate the compatibility of native predators,
Chrysoperla carnea
larvae and adults of
Brumus suturalis
and the exotic predator
Cryptolaemus montrouzieri
with neem oil for the control of
Phenacoccus solenopsis
during 2018–2019 and 2019–2020. The assessments were based on mealybug control (scale 0–9) and the percent recovery of predators. Both native predators,
C. carnea
and
B. suturalis
showed better control of the mealybug under semi-field and field conditions over the control and were also recovered at the end of the trials during both the study years which proved the conservation and colonization capability of the predator to local conditions. In contrast, the exotic predator,
C. montrouzieri
proved to be the most efficient predator of
P. solenopsis
under semi-field conditions, however, it failed to establish under field conditions and control the mealybug populations. No recoveries were made of the predator in either of the treatments under field conditions. The maximum reduction in the population of mealybug was noticed in the insecticide-treated plants. The present study showed that the application of neem oil followed by the release of
C. carnea
larvae and
B. suturalis
adults can be swapped to synthetic insecticides for the safer management of mealybug.
