Citrus Mealybug Control: Proven Strategies to Protect Your Orchards and Maximize Yields

Citrus mealybugs and their kin in blueberry plantations is an issue that bothers berry cultivators and gardeners both. These sucking insects multiply very fast and protect themselves using a hard and waxy cover thereby making them elusive for citrus mealybug control. I found out over the years that a combination of sometimes hard intensive cultural work, coupled with the application of biological products that can sustain themselves over time is the best way to go. I have made some good progress collaborating with university labs and microbial specialists in designing an approach to managing these pest organisms that are so challenging to control by working with the university and microbial specialists and as well as introducing products such as Beveria WP, organic pesticide for mealybugs, which is composed of a fungus Beauvaria bassiana and allows us to shift the balance a bit to help fight these pests in a smarter way. Continue reading to know about how to treat mealybugs. 

Understanding the Citrus Mealybug: Life Cycle & Threats

The citrus mealybug (Planococcus citri) is a soft bodied, oval shaped insect that is readily identified by its waxy white covering. The life cycle of the citrus mealybug starts with the laying of hundreds of tiny eggs by the females in cottony sacs. The eggs emerge as yellowish nymphs called crawlers which actively seek good feeding sites on the plant. Citrus mealybug has multiple overlapping generations per year and so it is not unusual to find multiple life stages on a plant at any one time. This makes management difficult especially in hot and sheltered environments such as citrus orchards and high value blueberry plantations. It is important to understand this citrus mealybug life cycle in order to develop specific citrus mealybug control measures to interrupt their reproduction and feeding pattern before they become overwhelming.

Citrus Mealybug Damage: What to Watch Out For

The infestation of citrus mealybug (Planococcus citri) has many detrimental effects on plants. The feeding behavior of these pests causes the leaves to turn yellow, curl, wilt and eventually fall off, with a resultant stunted growth of the plant. The mealybugs secrete a sticky substance known as honeydew as they feed and this encourages the growth of black sooty mould that covers the leaves and fruit and dramatically reduces their quality. Severe infestations of citrus mealybugs may cause up to 80 percent of the leaves to be lost and fruit to drop off. In blueberry crops, mealybugs are concentrated on the stems and calyxes of the fruit; they readily move between plants by hitching a ride on contaminated equipment and through dense, shady canopies. It is important to understand citrus mealybug damage to take timely citrus mealybug control measures and to effective citrus mealybug treatment, given that there are several overlapping stages in the citrus mealybug life cycle that make infestations persistent and difficult to eliminate.

Practical Cultural Practices for Mealybug Control: Gardener’s Perspective

Cultural practices should be an excellent start to every sustainable fight against mealybugs. Close monitoring of newly planted plants is likely to help identify infestations early enough, and pruning of infested branches before they can spread an outbreak is also beneficial. Regular pruning will also help in good air circulation and also eliminate the shady areas where mealybugs love to live. It is also advisable to remove fallen leaves and debris, clean gardening tools to prevent the spread of pests and control weeds and other alternative host plants, which harbor mealybugs. In small gardens a good spray of water may be used to knock off young mealybug crawlers. Also, restricting nitrogen fertilizers will ensure that the plant does not produce the soft, lush growth that mealybugs love to feed on. University entomologists confirm that these are the basic gardening principles, which are the foundation of effective citrus mealybug control and are the key elements of how to treat mealybugs naturally and sustainably.

How to Treat Mealybugs: Lady Beetles, Parasitoids, and Fungal Biocontrols

Nature provides a number of major partners in the citrus mealybug management. The most successful of these is the predatory beetle Cryptolaemus montrouzieri, or the so-called mealybug destroyer. Its larvae and adults feed on all mealybug stages and decrease the populations of the pests in various crops. In addition, the parasitoid wasp Leptomastix dactylopii helps in the control of the mealybugs by parasitizing them. In chronic epidemics, entomopathogenic fungi, especially Beauveria bassiana, have proved highly effective. Agricultural research in India and Australia has demonstrated that these biological controls have a strong and sustainable effect on the population of citrus mealybug, with little chance of resistance development and no adverse effect on pollinators or beneficial insects. Collectively, these natural enemies form an important component of an integrated management of citrus mealybug to offer non-chemical options to chemical control. The use of these allies with organic pesticide for citrus mealybug treatment is the most important part of effective and sustainable control.

Spotlight: Beveria WP and Beauveria bassiana—Citrus mealybug treatment

Beveria WP, organic pesticide for mealybugs for citrus mealybug control, is a commercial wettable powder that contains the spores of Beauveria bassiana, which is leading the way in organic pesticide against mealybugs. When applied as a foliar or soil spray, the fungal spores attach to the waxy coating of the pest, enter it, and reproduce inside the insect killing it, no matter what stage of its life cycle it is in. University trials have repeatedly demonstrated that regular applications of Beveria WP, containing Beauveria bassiana, can reduce citrus mealybug populations by more than 75 percent, with no risk to beneficial insects or pollinators and in combination with broader integrated pest management. 

Application Tips: How to Treat Mealybugs Effectively with Beveria WP

The best performance of controlling mealybugs with Beveria WP, organic pesticide for mealybugs, is achieved by mixing 1-1.2 grams of the product per liter of water, and spraying thoroughly all the surfaces- especially the undersides of leaves and crevices where mealybugs conceal themselves. When drenching the soil, the dose is 2-3 grams/liter. Spraying should be done early in the morning or in the evening to prevent heat stress on the fungus and should be repeated after every 7-10 days when the pest population is high. It is recommended that humidity be maintained at 60% or above to optimize fungal activity of Beauveria bassiana. Also, do not leave freshly prepared solutions in the sun or heat to maintain spore viability. This technique is compatible with successful citrus mealybug control by using Beauveria bassiana as an efficient and non-hazardous organic insecticide against mealybugs.

Why Biological Citrus Mealybug Controls Like Beveria WP Make Sense: How to treat Mealybugs

Biological pest citrus mealybug management is becoming more and more popular in modern, sustainable farming. Organic pesticide for mealybugs such as Beveria WP, which has the entomopathogenic fungus Beauveria bassiana, are synergistic with natural predators and parasitoids to keep mealybug populations down. These biological controls are not harmful to pollinators and other beneficial insects and do not cause resistance as is often the case with broad-spectrum chemical pesticides. These bioproducts offer a potential solution to gardeners and growers who want efficient, residue-free, and organic-friendly solutions to healthy, pest-resistant orchards and gardens. This solution fits well into sustainable citrus mealybug control, as it provides a good organic pesticide against mealybugs.

Conclusion: My Advice for Healthier Orchards and Gardens

As a gardener who has dealt with a few mealybug epidemics, begin with regular plant inspections, regular sanitation, and encouragement of beneficial insects. Periodic examination of plants will allow detecting infestations early, and orchard and garden cleanliness will minimize the habitats of mealybugs. Preserving and encouraging natural predators is an addition to these efforts. When you have to put more muscle on persistent pests, turn to effective bioproducts like Beveria WP,organic pesticide for mealybugs, to provide reliable citrus mealybug control and citrus mealybug treatment. Always contact local extension services or trusted suppliers to customize the strategies to your own circumstances. Sustainable citrus mealybug management is a long-term measure--but with these combined measures, you will keep your harvest and garden peace intact. Proper treatment of citrus mealybugs, understanding how to treat mealybugs.

Reference:

• Acheampong, M. A., et al. "UV sensitivity of Beauveria bassiana and Metarhizium anisopliae isolates under investigation as potential biological control agents in South African citrus orchards." Fungal Biology 124.5 (2020): 304-310.
• Chartier FitzGerald, V. C., et al. "Screening of entomopathogenic fungi against citrus mealybug, Plannococcus citri (Hemiptera: Pseudococcidae)." African Entomology 24.2 (2016): 343-351.