Application of the combination of Calontropis gigantea L. and Crescentia cujete L. against Schirpophaga innotata and Leptocorisa acuta Thunb. and predator in paddy plants

Abstract

C. gigantea L. and C. cujete L. are plants that contain secondary metabolites that can act as insecticides. This study aimed to evaluate the implications of C. gigantea and C. cujete to reduce the population and intensity of attack by stem borer (S. innotata) and stink bug (L. acuta) which are the main pests of paddy plants. This study consisted of 4 treatments consisting of a mixture of C. gigantea and C. cujete extracts, C. gigantea extracts, C. cujete extracts, and control with 5 replications. The extract made by fermentation ant the extract was applied at the age of 1 month after planting with a concentration of 5% for 8 times with a frequency of 1 time a week. Observation parameters were population and attack intensity of S. innotata and L. acuta as well as natural enemy population. The results obtained were that the treatment of all extracts could reduce the population and intensity of attacks compared to the control. Treatment of the mixture of C. gigantea and C. cujete extracts can reduce the population and the intensity of attacks is higher than without the mixture. Predator is not affected by extract applications.

Application of majapahit (Crescentia cujete L.) fruit extract to control armyworm (Spodoptera litura Fabricius, 1775) infestation in Chinese mustard crops

“…This information may provide insights into the low LDI values obtained in this study when applying high concentrations of C. cujete extract. Similarly, using the same formulation, C. cujete extract was effective in reducing the intensity of attacks by paddy pests [19]. The determination of LC50 was conducted to measure the optimum and efficient concentration for future applications against the same target.…”

Insecticidal activity of fermented Calatropis gigantea L and Crescentea cujete L. extract combination against rice pests and natural enemies

“…Larvae of C. medinalis infest the leaves by eating the green tissue of rice. This infestation offers a big problem when the flag leaf is high, more than 50% in the maximum tillering and maturation phases [19]. The symptoms are characterized by the presence of white color on the leaves.…”

Evaluation of Spatial Distribution of Three Major Leptocorisa (Hemiptera: Alydidae) Pests Using MaxEnt Model

“…As climate change progresses, in addition to expanding the distribution range of the Leptocorisa species, it is expected that the life cycle will be accelerated, the density will increase, and the rice ear development period will be earlier, which can increase the possibility of heavy damage to rice. Even though a few studies have been conducted on the preparations for mitigating the economic damage of Leptocorisa species, such as insecticides including natural extracts, entomopathogenic fungus, natural enemies and parasitic species, density survey, and resistant rice varieties, a study on their distribution ranges according to climate change is demanded [ 80 , 91 , 92 , 93 , 94 , 95 , 96 , 97 , 98 ].…”