are the major pests in guava. Alternate hosts are cotton, Plumeria alba, Jatropha, Guava, Calotropis, weeds, Coleus, Nerium, Parthenium, Redgram, wild Mulberry, and Solanum sp. Mealybug Life Cycle. This portal has been developed as part of the national level initiative - India Development Gateway (InDG), dedicated for providing information / knowledge and ICT based knowledge products and services in the domain of social development. and Green lacewing. The scarlet mite is also one of the pests of guava. Adults (1/10 — 1/4 inch long) are soft, oval distinctly segmented insects that are usually covered with a white or gray mealy wax. The guava plant is easy to recognize because of its smooth, thin, copper-colored bark that flakes off, showing the greenish layer beneath; and also because of the attractive, Loss of plant vigor and drying of shoots. The Larvae hatched creates webs. The guava is subject to attack by several kinds of insects. Control methods. Author(s) : Mani, M. Author Affiliation : Biological Control Laboratory, Division of Entomology and Nematology, Indian Institute of Horticultural Research, Bangalore 560089, Karnataka, India. Such fruits weaken, rot and drop down. • Small ‘crawlers’ get readily dispersed by wind, rain, irrigation water, birds, ants, clothing, and vehicle, etc. in the control of mealybug, Planococcus citri (Risso) in guava orchards. Nymphs and adults suck the sap from leaves, shoots and fruits. Here's how to stop a mealybug infestation: 1. Take good care of your plants. Nymphal normally takes around 14-16 days. They are active early on, but move little once a suitable feeding site is found.Note: There are approximately 275 species of mealybugs known to occur throughout the United States. This is a common symptom of bark caterpillars. Many Plant Lovers want to know about Make sure you don’t use already infected plantlets or … For large infestations, use Yates Nature’s Way Vegie & Herb Spray Concentrate. Regularly inspect mealybug-prone plant species in your landscape or indoor plantings for mealybugs. Severe damage can result in the death of attacked stem. Nematodes are a group of worms that commonly parasite plants causing a devastating loss in crop yield and quality. This is a pest of guava that affect guava plant yield and productivity. Thrips have dark brown to black coloration, with the female having a red color on the abdominal segments. Pupae stage takes place within the fruit in a silken cocoon. The pupae last for about 4-11 days in the parasitic life cycle. Please leave all source links intact and adhere to applicable copyright and intellectual property guidelines and laws. Guava Pests and Beneficial Insects. (2006). They cause a devastating loss in yield and quality of fruits in guava plant. Mealybugs are common indoor pests. They are Medium in size with bright orange-yellow color and numerous f black dots on wings. Published 2019 Feb 22. doi:10.1016/j.heliyon.2019.e01252, Sathe, Tukaram. It has been recognized as a difficult-to-control pest in Europe since 1813 (where it is called the greenhouse mealybug) and in the United States since 1879 (Anonymous 2007). It has been reported on host-plants belonging to over 203 genera in 77 families, and can damage many crops, particularly tropical fruit, nut and spice crops and field crops like soybean and tomato. The Maggot usually pupates in soil, and the pupae usually last for about  7 – 13 days. The Adult females of mealybug are pinkish and sparsely enclosed within a white wax. Adults produced take 13 to 21 days. They stay hidden in the galleries during the day time, and come out during the night and feed on the bark. on guava in India* - Volume 11 Issue 2 - M. Mani, A. Krishnamoorthy, S. P. Singh Spring-time attacks are the most deleterious. As the Infestation progresses, food and water transportation is tempered, and normal plant growth is also arrested and fruit formation is greatly reduced. The parasitic phase is completed within 22 days. Blackish larva can be observed underneath the fresh webbing. Heavily infested plants should be discarded. The larva bores into the young fruits and feed on juicy flesh. Effectiveness of the exotic encyrtid parasitoid, Leptomastix dactylopii How. One can control Mealy bugs easily in the following ways. Larvae faeces may be seen exuding out of the borer hole. Isolate infected plants so the infestation does not spread. The pink hibiscus mealybug, Maconellicoccus hirsutus, is a serious pest of many plants in tropical and subtropical regions, including Africa, southeast Asia, and northern Australia. This is another insect that affects the quality of the fruit of most plants including guava. GREEN GUAVA MEALYBUG. Feeds on internal contents (pulp and seeds), Infected fruits dry up and fall off without ripening. The Larval phase lasts for about  9 to 11 months and then develop into pupae within the stem. Natural enemies of fruit borers: Parasitoids: Trichogramma chilonis, Tetrastichus spp., Telenomus spp., Chelonus blackburni, Carcelia spp. The eggs normally take  1 to 4 days. The holes created by the larvae secret juicy excreta. The fruit fly, mealy bug, scale insects, etc. (2015). The lesions may combine to form large patches on leaves. They normally spend around  7-34 days in the parasitic life cycle. Removing dead areas of the plant can help take away their hiding spots, as well as reduce the occurrence of mold on your plant. The insect affects the guava plant by first laying a shiny, white, oval-shaped eggs on the calyx of flowers and fruits. The insect affects fruit quality and general plant vigor. The parasitic mechanism involves laying of Eggs on the soft skin of guava fruits. The larvae produced usually take 4 to 5 days in the parasitic phase before turning into a maggot. The females are brownish-violet having an orange patch on their forewings. The orange-colored crawler nymphs consist of both males and females that have 3 and 4 nymphal instars each. It has been recognized as a difficult-to-control pest in Europe since 1813 (where it is called the greenhouse mealybug) and in the United States since 1879 (Anonymous 2007). Green guava mealybug (also known as the green shield scale) is a tropical species common to Southeast Asia, the West Indies, Florida and Hawaii (Dahlsten & Hall 1999). Leaves of infested guava plants are covered by a sticky substance. The sticky sugar secretion released by the adults and nymphs pest may cause the formation of sooty mold fungus. There is a great reduction in pesticide load leading to less residue problems and environmental pollution by practicing biological control of the pests in guava eco-system. Caterpillar bores into young fruits but they may also bore buds and tender shoots. As the infestation progresses,  the entire surface of guava fruits will split. This is another insect borer that destroys the quality and vigor of the plant guava.
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